Between brackets is the number of accepted species
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2 Shows the number of accepted species within the taxon
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- Biota
- Kingdom Animalia
- Kingdom Archaea
- Kingdom Bacteria
- Kingdom Chromista
- Kingdom Fungi
- Kingdom Plantae
- Phylum Acritarcha †
- Phylum Algae (awaiting allocation)
- Phylum Algae incertae sedis
- Phylum Anthocerotophyta
- Phylum Bryophyta
- Phylum Calcitarcha †
- Phylum Charophyta
- Phylum Chlorophyta
- Phylum Eophyta †
- Phylum Glaucophyta
- Phylum Gymnospermophyta accepted as Tracheophyta
- Phylum Horneophyta †
- Phylum Magnoliophyta accepted as Tracheophyta
- Phylum Marchantiophyta
- Phylum Picozoa
- Phylum Plantae (awaiting allocation)
- Phylum Prasinodermatophyta
- Phylum Pteridophyta accepted as Tracheophyta
- Phylum Rhodelphidia
- Phylum Rhodophyta
- Phylum Sporae dispersae †
- Phylum Tracheophyta
- Subdivision Lycopodiophytina
- Subdivision Polypodiophytina
- Subdivision Spermatophytina
- Superclass Angiospermae
- Class Liliopsida accepted as Magnoliopsida
- Class Magnoliopsida
- Order Acorales
- Order Adoxales accepted as Dipsacales
- Order Alismatales
- Order Alstroemeriales accepted as Liliales
- Order Amaryllidales accepted as Asparagales
- Order Amborellales
- Order Apiales
- Order Apocynales accepted as Gentianales
- Order Aquifoliales
- Order Arales accepted as Alismatales
- Order Araliales accepted as Apiales
- Order Aralidiales accepted as Apiales
- Order Arecales
- Order Aristolochiales accepted as Piperales
- Order Asparagales
- Order Asterales
- Family Abrophyllaceae Nakai, 1943 accepted as Rousseaceae de Candolle, 1839
- Family Alseuosmiaceae Airy Shaw, 1965
- Family Argophyllaceae Takhtajan, 1987
- Family Asteraceae von Berchtold & J. Presl, 1820
- Genus Aaronsohnia O. Warburg & A. Eig, 1927
- Genus Abasoloa La Llave in La Llave & Lexarza, 1824
- Genus Abrotanella Cassini in F. Cuvier, 1825
- Genus Abrotanum Duhamel du Monceau, 1755
- Genus Absinthium P. Miller, 1754 accepted as Artemisia Linnaeus, 1753
- Genus Acamptopappus (A. Gray) A. Gray, 1873
- Genus Acanos Adanson, 1763
- Genus Acanthambrosia Rydberg, 1922
- Genus Acanthium Heister ex Fabricius, 1759
- Genus Acanthocephalus Karelin & Kirilov, 1842
- Genus Acanthocladium F. von Mueller, 1861
- Genus Acanthodesmos C.D. Adams & M.C. du Quesnay, 1971
- Genus Acantholepis Lessing, 1831 accepted as Echinops Linnaeus, 1753
- Genus Acanthophyllum W.J. Hooker & Arnott in W.J. Hooker, 1835 accepted as Nassauvia Commerson ex A.L. Jussieu, 1789
- Genus Acanthophyton Lessing, 1832
- Genus Acanthosonchus (Schultz-Bip) M.E. Kirpicznikov, 1960
- Genus Acanthospermum Schrank, 1820
- Genus Acanthostyles R.M. King & H.E. Robinson, 1971
- Genus Acanthotheca A.P. de Candolle, 1838
- Genus Acanthoxanthium (A.P. de Candolle) Fourreau, 1869
- Genus Acarna Boehmer in C.G. Ludwig, 1760 accepted as Atractylis Linnaeus, 1753
- Genus Acarna J. Hill, 1762
- Genus Acarphaea W.H. Harvey & A. Gray ex A. Gray, 1849
- Genus Achaenipodium T.S. Brandegee, 1906 accepted as Verbesina Linnaeus, 1753
- Genus Achaetogeron A. Gray, 1849 accepted as Erigeron Linnaeus, 1753
- Genus Achariterium M.J. Bluff & C.A. Fingerhuth, 1825-1826
- Genus Achillea Linnaeus, 1753
- Genus Achnophora F. von Mueller, 1883
- Genus Achnopogon Maguire, Steyermark & Wurdack, 1957
- Genus Achromolaena Cassini in F. Cuvier, 1828
- Genus Achrysum A. Gray, 1852
- Genus Achyrachaena Schauer, 1838
- Genus Achyranthemum N. Bergh in Bergh & Manning, 2019
- Genus Achyrobaccharis C.H. Schultz-Bipontinus ex Walpers, 1843 accepted as Baccharis Linnaeus, 1753
- Genus Achyrocline (Lessing) A.P. de Candolle, 1838
- Genus Achyrocoma (Cassini) Cassini in F. Cuvier, 1823 accepted as Vernonia Schreber, 1791
- Genus Achyrocome Schrank, 1824
- Genus Achyropappus Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Achyrophorus Adanson, 1763 accepted as Hypochaeris Linnaeus, 1753
- Genus Achyroseris C.H. Schultz-Bipontinus, 1845 accepted as Scorzonera Linnaeus, 1753
- Genus Achyrothalamus O. Hoffmann, 1893 accepted as Erythrocephalum Bentham in Bentham & J.D. Hooker, 1873
- Genus Aciclinium Torrey & A. Gray, 1842
- Genus Acilepidopsis H. Robinson, 1989
- Genus Acilepis D. Don, 1825
- Genus Aciphyllaea (A.P. de Candolle) A. Gray, 1849 accepted as Thymophylla Lagasca, 1816
- Genus Acleia A.P. de Candolle, 1838
- Genus Acmella L.C.M. Richard in Persoon, 1807
- Genus Acoma Bentham, 1844
- Genus Acomis F. von Mueller, 1864
- Genus Acosta Adanson, 1763
- Genus Acostitrapa S. Rauschert, 1973
- Genus Acourtia D. Don, 1830
- Genus Acrisione B. Nordenstam, 1985
- Genus Acritopappus R.M. King & H.E. Robinson, 1972
- Genus Acrocentron Cassini in F. Cuvier, 1826
- Genus Acroclinium A. Gray, 1852 accepted as Rhodanthe Lindley, 1834
- Genus Acrolophus Cassini in F. Cuvier, 1827
- Genus Acroptilion accepted as Acroptilon Cassini in F. Cuvier, 1827
- Genus Acroptilon Cassini in F. Cuvier, 1827 accepted as Rhaponticum S. Vaillant, 1754
- Genus Actartife Rafinesque, 1840
- Genus Actimeris Rafinesque, 1819
- Genus Actinea A.L. Jussieu, 1803 accepted as Helenium Linnaeus, 1753
- Genus Actinella Persoon, 1807 accepted as Helenium Linnaeus, 1753
- Genus Actinella Jussieu ex Nuttall, 1818
- Genus Actinobole Endlicher, 1843
- Genus Actinolepis A.P. de Candolle, 1836
- Genus Actinomeris Nuttall, 1818 accepted as Verbesina Linnaeus, 1753
- Genus Actinopappus J.D. Hooker ex A. Gray, 1852
- Genus Actinoseris (Endlicher) Cabrera, 1970 accepted as Richterago O. Kuntze, 1891
- Genus Actinospermum S. Elliott, 1823 accepted as Balduina Nuttall, 1818
- Genus Actipsis Rafinesque, 1837
- Genus Actites N.S. Lander, 1976
- Genus Acunniana A.E. Orchard, 2013
- Genus Addisonia H.H. Rusby, 1893
- Genus Adeia G.L. Nesom, 2021
- Genus Adelmannia H.G.L. Reichenbach, 1829
- Genus Adelostigma Steetz in Peters, 1864
- Genus Adenachaena A.P. de Candolle, 1838 accepted as Phymaspermum Lessing, 1832
- Genus Adenanthellum B. Nordenstam, 1979
- Genus Adenanthemum B. Nordenstam, 1976 accepted as Adenanthellum B. Nordenstam, 1979
- Genus Adenocaulon W.J. Hooker, 1829
- Genus Adenochaena A.P. de Candolle, 1838
- Genus Adenocritonia R.M. King & H. Robinson, 1976
- Genus Adenocyclus Lessing, 1829
- Genus Adenoglossa B. Nordenstam, 1976
- Genus Adenogonum Welwitsch ex W.P. Hiern, 1898
- Genus Adenolepis Lessing, 1831
- Genus Adenoon Dalzell, 1850
- Genus Adenopappus Bentham, 1840 accepted as Tagetes Linnaeus, 1753
- Genus Adenophyllum Persoon, 1807
- Genus Adenosolen A.P. de Candolle, 1838
- Genus Adenospermum W.J. Hooker & Arnott, 1841
- Genus Adenostemma J.R. Forster & J.G.A. Forster, 1775
- Genus Adenostyles Cassini in F. Cuvier, 1816
- Genus Adenothamnus Keck, 1935
- Genus Adenotrichia J. Lindley, 1828
- Genus Adiaphila G.L. Nesom, 2021
- Genus Adonigeron Fourreau, 1868
- Genus Adopogon Necker ex O. Kuntze, 1891
- Genus Adventina Rafinesque, 1836 accepted as Galinsoga Ruiz & Pavon, 1794
- Genus Aedesia O. Hoffmann in Engler & Prantl, 1897
- Genus Aegialophila Boissier & Heldreich ex Boissier, 1849
- Genus Aegopordon Boissier, 1846 accepted as Jurinea Cassini, 1821
- Genus Aequatorium B. Nordenstam, 1978
- Genus Aetheocephalus Gagnepain, 1920
- Genus Aetheolaena Cassini in F. Cuvier, 1827 accepted as Senecio Linnaeus, 1753
- Genus Aetheopappus Cassini in F. Cuvier, 1827
- Genus Aetheorhiza Cassini in F. Cuvier, 1827
- Genus Aethonia D. Don, 1829
- Genus Afroaster J. Manning & P. Goldblatt, 2012
- Genus Afrocarduus (S.M.A. Kazmi) N. Garcia-Jacas, L.D. Moreyra & A. Susanna in Moreyra et al., 2023
- Genus Afrocirsium J.A. Calleja, N. Garcia-Jacas, L.D. Moreyra & A. Susanna in Moreyra et al., 2023
- Genus Aganippea A.P. de Candolle, 1838
- Genus Agarista A.P. de Candolle, 1836
- Genus Agassizia A. Gray & Engelmann, 1846
- Genus Agataeha Cassini, 1815
- Genus Agathaea Cassini, 1815 accepted as Felicia Cassini, 1818
- Genus Agathomeris Delaunay, 1805
- Genus Agathyrsus D. Don, 1829
- Genus Agenora D. Don, 1829
- Genus Ageratella A. Gray in S. Watson, 1887
- Genus Ageratina Spach, 1841
- Genus Ageratina O. Hoffmann in Engler, 1900
- Genus Ageratinastrum Mattfeld, 1932
- Genus Ageratum Linnaeus, 1753
- Genus Agiabampoa J.N. Rose ex O. Hoffmann in Engler & Prantl, 1894 accepted as Alvordia T.S. Brandegee, 1889
- Genus Aglaodendron Rémy, 1849
- Genus Aglotoma Rafinesque, 1837
- Genus Agnorhiza (W.L. Jepson) W.A. Weber, 1999
- Genus Agoseris Rafinesque, 1817
- Genus Agrianthus C.F.P. Martius ex A.P. de Candolle, 1836
- Genus Agriphyllum A.L. Jussieu, 1789 accepted as Berkheya F. Ehrhart, 1784
- Genus Aimorra Rafinesque, 1838
- Genus Ainsliaea A.P. de Candolle, 1838
- Genus Aiolotheca A.P. de Candolle, 1836 accepted as Zaluzania Persoon, 1807
- Genus Ajania P.P. Poljakov, 1955 accepted as Chrysanthemum Linnaeus, 1753
- Genus Ajaniopsis C. Shih, 1978
- Genus Akeassia J.-P. Lebrun & A.L. Stork, 1993
- Genus Akylopsis J.G.C. Lehmann in E. Otto, 1852
- Genus Alarconia A.P. de Candolle, 1836 accepted as Wyethia Nuttall, 1834
- Genus Alatoseta R.H. Compton, 1931
- Genus Albertinia K.P.J. Sprengel, 1820
- Genus Albinea Hombron & Jacquinot in Dumont d'Urville, 1845
- Genus Alboviodoxa Woronow ex A.A. Grossheim, 1949
- Genus Alcantara Glaziou ex G.M. Barroso, 1969 accepted as Xerxes J.R. Grant, 1994
- Genus Alcina Cavanilles, 1791 accepted as Melampodium Linnaeus, 1753
- Genus Alciope A.P. de Candolle in J. Lindley, 1836 accepted as Capelio B. Nordenstam, 2002
- Genus Aldama La Llave in La Llave & Lexarza, 1824
- Genus Aldunatea E.J. Remy in C. Gay, 1848
- Genus Alepidocline S.F. Blake, 1934
- Genus Alepodocline S.F. Blake, 1934 accepted as Alepidocline S.F. Blake, 1934
- Genus Alfredia Cassini in F. Cuvier, 1816
- Genus Alibum Lessing, 1832
- Genus Aliella M. Qaiser & H.W. Lack, 1986
- Genus Aliseta Rafinesque, 1836
- Genus Alitubus Dulac, 1867
- Genus Alkibias Rafinesque, 1838
- Genus Allagopappus Cassini in F. Cuvier, 1828
- Genus Allardia Decaisne in Jacquemont, 1841
- Genus Allendea La Llave in La Llave & Lexarza, 1824
- Genus Allittia P.S. Short, 2004
- Genus Allocarpus Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Allocephalus J.B. de A. Bringel Jr., J.N. Nakajima & H. Robinson, 2011
- Genus Alloiozonium G. Kunze, 1844
- Genus Alloispermum Willdenow, 1807
- Genus Allopterigeron C.R. Dunlop, 1981
- Genus Almutaster Á. Löve & D. Löve in Á. Löve, 1982
- Genus Alomia Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Alomiella R.M. King & H.E. Robinson, 1972
- Genus Alophium Cassini in F. Cuvier, 1829
- Genus Altamirania Greenman, 1903
- Genus Alvordia T.S. Brandegee, 1889
- Genus Alymnia Necker ex Spach, 1841
- Genus Amauria Bentham, 1844
- Genus Amauriopsis Rydberg, 1914
- Genus Ambassa Steetz in Peters, 1864
- Genus Amberboa (Persoon) Lessing, 1832
- Genus Amberboi Adanson, 1763 accepted as Volutaria Cassini, 1816
- Genus Amblyocarpum F.E.L. Fischer & C.A. Meyer, 1837
- Genus Amblyolepis A.P. de Candolle, 1836
- Genus Amblyopappus W.J. Hooker & Arnott, 1841
- Genus Amblyopogon (F.E.L. Fischer & C.A. Meyer ex A.P. de Candolle) Jaubert & Spach, 1847
- Genus Amblysperma Bentham in Endlicher et al., 1837 accepted as Trichocline Cassini, 1817
- Genus Amboroa Cabrera, 1956
- Genus Ambraria Cruse, 1825
- Genus Ambrosia Linnaeus, 1753
- Genus Ameghinoa Spegazzini, 1897
- Genus Amellus Linnaeus, 1759
- Genus Amellus P. Browne, 1756
- Genus Amellus Adanson, 1763
- Genus Amida Nuttall, 1841
- Genus Ammanthus Boissier & Heldreich ex Boissier, 1849
- Genus Ammobium R. Brown in J. Sims, 1824
- Genus Ammocyanus (Boissier) J. Dostál, 1973 accepted as Centaurea Linnaeus, 1753
- Genus Ammodia Nuttall, 1840
- Genus Ammogeton H.A. Schrader, 1833
- Genus Ammopursus J.K. Small, 1924
- Genus Ammoseris Endlicher, 1838
- Genus Amolinia R.M. King & H.E. Robinson, 1972
- Genus Ampelaster G.L. Nesom, 1995
- Genus Ampherephis Kunth in Humboldt, Bonpland & Kunth, 1818 accepted as Centratherum Cassini, 1817
- Genus Amphiachyris (Alph. de Candolle) Nuttall, 1840
- Genus Amphibecis Humboldt ex Schrank, 1823-1824
- Genus Amphicalea (A.P. de Candolle) Gardner, 1848 accepted as Calea Linnaeus, 1763
- Genus Amphidoxa A.P. de Candolle, 1838 accepted as Gnaphalium Linnaeus, 1753
- Genus Amphiglossa A.P. de Candolle, 1838
- Genus Amphipappus J. Torrey & A. Gray, 1845
- Genus Amphiraphis A.P. de Candolle accepted as Amphirhapis A.P. de Candolle, 1836
- Genus Amphirhapis A.P. de Candolle, 1836 accepted as Duhaldea A.P. de Candolle, 1836
- Genus Amphoricarpos Visiani, 1844
- Genus Anacantha (M.M. Iljin) J. Soják, 1982
- Genus Anacis Schrank, 1817
- Genus Anactinia (J.D. Hooker) E.J. Remy in C. Gay, 1849
- Genus Anactis Rafinesque, 1815
- Genus Anactis Cassini in F. Cuvier, 1827
- Genus Anacyclus Linnaeus, 1753
- Genus Anacylus accepted as Anacyclus Linnaeus, 1753
- Genus Anaglypha A.P. de Candolle, 1836
- Genus Anaitis A.P. de Candolle, 1836
- Genus Anandria Lessing, 1830 accepted as Leibnitzia Cassini in F. Cuvier, 1822
- Genus Ananthura H. Robinson & J.J. Skvarla, 2011
- Genus Anaphalioides (Bentham) Kirpichnikov, 1950
- Genus Anaphalis A.P. de Candolle, 1838
- Genus Anaschovadi Adanson, 1763
- Genus Anastraphia D. Don, 1830
- Genus Anaxeton J. Gaertner, 1791
- Genus Ancathia A.P. de Candolle, 1833
- Genus Ancistrocarphus A. Gray, 1868
- Genus Ancistrophora A. Gray, 1859
- Genus Anderbergia R.B. Nordenstam, 1996
- Genus Andicolea L. Mayta & E. Molinari-Novoa, 2021
- Genus Andrieuxia A.P. de Candolle, 1836
- Genus Andromachia Bonpland in Humboldt & Bonpland, 1812
- Genus Andryala Linnaeus, 1753
- Genus Anemocarpa Paul G. Wilson, 1992
- Genus Anemonospermos Boehmer in C.G. Ludwig, 1760
- Genus Angelandra Endlicher, 1843
- Genus Angeldiazia M.O. Dillon & M. Zapata Cruz, 2010
- Genus Angelianthus H.E. Robinson & R.D. Brettell, 1974 accepted as Microliabum Cabrera, 1955
- Genus Angelphytum G.M. Barroso, 1980
- Genus Angianthus J.C. Wendland, 1808 (?)
- Genus Anisocarpus Nuttall, 1841
- Genus Anisochaeta A.P. de Candolle, 1836
- Genus Anisocoma J. Torrey & A. Gray in A. Gray, 1845
- Genus Anisoderis Cassini in F. Cuvier, 1827 accepted as Crepis Linnaeus, 1753
- Genus Anisolepis Steetz in J.G.C. Lehmann, 1845
- Genus Anisopappus W.J. Hooker & Arnott, 1837
- Genus Anisoramphus A.P. de Candolle, 1838
- Genus Anisothrix O. Hoffmann in O. Kuntze, 1898
- Genus Anomostephium A.P. de Candolle, 1836 accepted as Wedelia N.J. Jacquin, 1760
- Genus Antennaria J. Gaertner, 1791
- Genus Anteremanthus H.E. Robinson, 1992
- Genus Anthechamomilla S. Rauschert, 1974
- Genus Anthechrysanthemum Domin, 1935
- Genus Antheidosorus A. Gray, 1851
- Genus Anthematricaria accepted as Anthemimatricaria P. Fournier, 1928
- Genus Anthemimatricaria P. Fournier, 1928
- Genus Anthemi-matricaria P. Fournier, 1928 accepted as Anthemimatricaria P. Fournier, 1928
- Genus Anthemis Linnaeus, 1753
- Genus Anthepleurospermum W.H.P. Rothmaler, 1963
- Genus Antheropeas Rydberg, 1915 accepted as Eriophyllum Lagasca, 1816
- Genus Anthocerastes A. Gray, 1852
- Genus Anthochytrum H.G. Reichenbach, 1859
- Genus Anticona E. Linares-Perea, J. Campos-de la Cruz & A. Galán de Mera, 2014
- Genus Antillanthus B. Nordenstam, 2006
- Genus Antillia R.M. King & H.E. Robinson, 1971
- Genus Antiphiona Merxmueller, 1954
- Genus Antithrixia A.P. de Candolle, 1838
- Genus Antrospermum C.H. Schultz-Bipontinus, 1844
- Genus Antunesia O. Hoffmann, 1892
- Genus Anura (S.V. Juzepczuk) O.V. Tscherneva, 1962 accepted as Cousinia Cassini in F. Cuvier, 1827
- Genus Anvillea A.P. de Candolle, 1836
- Genus Anvilleina Maire, 1939 accepted as Anvillea A.P. de Candolle, 1836
- Genus Aostea Buscalioni & Muschler, 1913
- Genus Apalochlamys Cassini in F. Cuvier, 1828
- Genus Apalus A.P. de Candolle, 1836
- Genus Apargia Scopoli, 1772 accepted as Leontodon Linnaeus, 1753
- Genus Apargidium Torrey & A. Gray, 1843 accepted as Microseris D. Don, 1832
- Genus Apatanthus D. Viviani, 1824
- Genus Aphanactis Weddell, 1856
- Genus Aphanopappus Endlicher, 1842
- Genus Aphanostephus A.P. de Candolle, 1836
- Genus Aphantochaeta A. Gray in Torrey, 1857 accepted as Chaetopappa A.P. de Candolle, 1836
- Genus Aphelexis D. Don, 1826
- Genus Aphyllocaulon Lagasca, 1811
- Genus Aphyllocladus Weddell, 1855
- Genus Aplactis Rafinesque, 1837
- Genus Aplina Rafinesque, 1838
- Genus Aplopappus Cassini in F. Cuvier, 1828 accepted as Haplopappus Cassini in F. Cuvier, 1828
- Genus Aplophyllum Cassini in F. Cuvier, 1824
- Genus Aplotaxis A.P. de Candolle, 1833 accepted as Saussurea A.P. de Candolle, 1810
- Genus Apodocephala J.G. Baker, 1885
- Genus Apogon S. Elliott, 1823
- Genus Apopyros G.L. Nesom, 1994
- Genus Aposeris Necker ex Cassini in F. Cuvier, 1827
- Genus Apostates N.S. Lander, 1989
- Genus Apowollastonia A.E. Orchard, 2013
- Genus Aptilon Rafinesque, 1838
- Genus Apuleia J. Gaertner, 1791 accepted as Apuleja J. Gaertner, 1791
- Genus Apuleja J. Gaertner, 1791
- Genus Aquilula G.L. Nesom, 2018
- Genus Arachnopogon Berg ex Haberle, ante 1832?
- Genus Arachnospermum F.W. Schmidt, 1795
- Genus Aracium A. Monnier, 1829
- Genus Arbelaezaster J. Cuatrecasas, 1986
- Genus Archanthemis R.M. Lo Presti & C. Oberprieler in R.M. Lo Presti, S. Oppolzer & C. Oberprieler, 2010
- Genus Archibaccharis W. Heering, 1904
- Genus Archidasyphyllum (A.L. Cabrera) P.L. Ferreira, M.M. Saavedra & M. Groppo, 2019
- Genus Archiserratula L. Martins, 2006
- Genus Arcion Bubani, 1899
- Genus Arctanthemum (N.N. Tzvelev) N.N. Tzvelev, 1985 accepted as Chrysanthemum Linnaeus, 1753
- Genus Arction Cassini in F. Cuvier, 1826
- Genus Arctium Linnaeus, 1753
- Genus Arctium Lamarck, 1779
- Genus Arctogeron A.P. de Candolle, 1836
- Genus Arctotheca J.C. Wendland, 1798
- Genus Arctotis Linnaeus, 1753
- Genus Arcyna A.M. Wiklund, 2003
- Genus Argentipallium Paul G. Wilson, 1992
- Genus Argyranthemum P.B. Webb in P.B. Webb & Berthelot, 1839
- Genus Argyrautia E.E. Sherff, 1944
- Genus Argyrochaeta Cavanilles, 1798
- Genus Argyrocome Breyne ex O. Kuntze, 1891
- Genus Argyrocome J. Gaertner, 1791
- Genus Argyroglottis Turczaninow, 1851
- Genus Argyrophanes D.F.L. Schlechtendal, 1847 accepted as Chrysocephalum Walpers, 1841
- Genus Argyrophyton W.J. Hooker, 1837
- Genus Argyrotegium J.M. Ward & I. Breitwieser in J.M. Ward, I. Breitwieser & C. Flann, 2003
- Genus Argyrovernonia N.F.F. MacLeish, 1984 accepted as Chresta Vellozo ex A.P. de Candolle, 1836
- Genus Argyroxiphium A.P. de Candolle, 1836
- Genus Arida (R.L. Hartman) D.R. Morgan & R.L. Hartman, 2003
- Genus Aristeguietia R.M. King & H. Robinson, 1975
- Genus Aristomenia Vellozo, 1829
- Genus Aristotela Adanson, 1763
- Genus Armania Bertero ex A.P. de Candolle, 1836
- Genus Arnaldoa Cabrera, 1962
- Genus Arnica Linnaeus, 1753
- Genus Arnica Boehmer in C.G. Ludwig, 1760
- Genus Arnicastrum Greenman, 1903
- Genus Arnoglossum Rafinesque, 1817
- Genus Arnoldia Cassini in F. Cuvier, 1824
- Genus Arnopogon Willdenow, 1803
- Genus Arnoseris J. Gaertner, 1791
- Genus Aromia Nuttall, 1841
- Genus Aronicum Necker ex H.G.L. Reichenbach, 1831
- Genus Arrhenachne Cassini in F. Cuvier, 1828
- Genus Arrhenechthites Mattfeld, 1938
- Genus Arrojadoa Mattfeld in Pilger, 1923
- Genus Arrojadocharis Mattfeld in Burret, 1930
- Genus Arrowsmithia A.P. de Candolle, 1838
- Genus Artanacetum (R.J. Rzazade) R.J. Rzazade, 1956
- Genus Artemisia Linnaeus, 1753
- Genus Artemisiastrum Rydberg, 1916
- Genus Artemisiella A. Ghafoor, 1992
- Genus Artemisiopsis S.M. Moore, 1902
- Genus Arthrolepis Boissier, 1849
- Genus Asaemia (W.H. Harvey) Bentham & J.D. Hooker, 1873
- Genus Asanthus R.M. King & H.E. Robinson, 1972 accepted as Steviopsis R.M. King & H.E. Robinson, 1971
- Genus Ascalea J. Hill, 1762
- Genus Ascaricida (Cassini) Cassini in F. Cuvier, 1817 accepted as Baccharoides Moench, 1794
- Genus Aschenbornia Schauer in C.G.D. Nees & Schauer, 1847 accepted as Calea Linnaeus, 1763
- Genus Ascidiogyne Cuatrecasas, 1965
- Genus Askellia W.A. Weber, 1984
- Genus Aslia Ş. Yıldırımlı, 2020 accepted as Pseudopodospermum (S.J. Lipschitz & I.M. Krascheninnikov) S.I. Kuthatheladze, 1978
- Genus Aspelina Cassini in F. Cuvier, 1826
- Genus Aspilia L.M.A.A. Du Petit-Thouars, 1806
- Genus Aspiliopsis Greenman, 1903 accepted as Podachaenium Bentham ex Oersted, 1852
- Genus Asplundianthus R.M. King & H. Robinson, 1975 accepted as Eupatorium Linnaeus, 1753
- Genus Astartoseris N. Kilian, R. Hand, G.N. Hadjikyriakou, C.S. Christodoulou & M. Bou Dagher-Kharrat, 2017
- Genus Astelma R. Brown ex Ker-Gawler, 1821
- Genus Astemma Lessing, 1832 accepted as Monactis Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Astephania D. Oliver, 1886
- Genus Astephanocarpa J.G. Baker, 1887
- Genus Aster Linnaeus, 1753
- Genus Asterago T.H. Everett, 1937 accepted as Solidaster Wehrhahn in Bondstedt, 1932
- Genus Asteridea J. Lindley, 1839
- Genus Asterigeron P.A. Rydberg, 1917 accepted as Erigeron Linnaeus, 1753
- Genus Asterigeron N.N. Tzvelev, 1994 accepted as Asterron I. Olshanskyi, 2022
- Genus Asteriscodes O. Kuntze, 1891
- Genus Asteriscus P. Miller, 1754
- Genus Asteroides P. Miller, 1754
- Genus Asteromoea Blume, 1826
- Genus Asteropsis Lessing, 1832
- Genus Asteropterus Adanson, 1763
- Genus Asterosperma Lessing, 1832
- Genus Asterothamnus I.V. Novopokrovsky, 1950
- Genus Asterothrix Cassini in F. Cuvier, 1827
- Genus Asterron I. Olshanskyi, 2022
- Genus Astradelphus E.J. Remy, 1849
- Genus Astranthium Nuttall, 1840
- Genus Astranthuim accepted as Astranthium Nuttall, 1840
- Genus Astrichoseris accepted as Atrichoseris A. Gray, 1884
- Genus Atalanthus D. Don, 1829
- Genus Athalmum Necker ex O. Kuntze, 1891
- Genus Athanasia Linnaeus, 1763
- Genus Athenaea Adanson, 1763
- Genus Athrixia Ker-Gawler, 1823
- Genus Athroisma A.P. de Candolle, 1833
- Genus Atractylis Linnaeus, 1753
- Genus Atractylis Boehmer in C.G. Ludwig, 1760 accepted as Phonus J. Hill, 1762
- Genus Atractylodes A.P. de Candolle, 1838
- Genus Atrichantha O.M. Hilliard & B.L. Burtt, 1981
- Genus Atrichoseris A. Gray, 1884
- Genus Auchera A.P. de Candolle, 1838
- Genus Aucklandia Falconer, 1841 accepted as Saussurea A.P. de Candolle, 1810
- Genus Augusta P. Leandro de Sacramento, 1821
- Genus Aurelia Cassini in F. Cuvier, 1817
- Genus Austrobrickellia R.M. King & H.E. Robinson, 1972
- Genus Austrocritonia R.M. King & H.E. Robinson, 1975
- Genus Austroeupatorium R.M. King & H.E. Robinson, 1970
- Genus Austroflourensia J.C. Ospina & S.E. Freire in Freire et al., 2023
- Genus Austroliabum H.E. Robinson & R.D. Brettell, 1974 accepted as Microliabum Cabrera, 1955
- Genus Austrosynotis C. Jeffrey, 1986
- Genus Autrania C. Winkler & Barbey in G.E. Post, 1892 accepted as Myopordon Boissier, 1846
- Genus Avellara G. Blanca & C. Díaz de la Guardia, 1985 accepted as Scorzonera Linnaeus, 1753
- Genus Axiniphyllum Bentham, 1872
- Genus Ayapana Spach, 1841
- Genus Ayapanopsis R.M. King & H.E. Robinson, 1972
- Genus Aylacophora Cabrera, 1953 accepted as Nardophyllum (W.J. Hooker & Arnott) W.J. Hooker & Arnott in W.J. Hooker, 1836
- Genus Aynia H.E. Robinson, 1988
- Genus Aytacia Ş. Yıldırımlı, 2020
- Genus Aztecaster G. L Nesom, 1993
- Genus Babcockia Boulos, 1965 accepted as Sonchus Linnaeus, 1753
- Genus Bacasia Ruiz & Pavon, 1794
- Genus Baccharidastrum Cabrera, 1937 accepted as Baccharis Linnaeus, 1753
- Genus Baccharidiopsis G.M. Barroso, 1975 accepted as Aster Linnaeus, 1753
- Genus Baccharidopsis G.M. Barroso accepted as Aster Linnaeus, 1753
- Genus Baccharis Linnaeus, 1753
- Genus Baccharites G. Saporta, 1881 †
- Genus Baccharoides Moench, 1794
- Genus Baculellum L.V. Ozerova & A.C. Timonin in Ozerova et al., 2017
- Genus Bacurio G.F. Smith & E. Figueiredo, 2020
- Genus Badilloa R.M. King & H. Robinson, 1975
- Genus Baeria F.E.L. Fischer & C.A. Meyer, 1836 accepted as Lasthenia Cassini, 1834
- Genus Baeriopsis J.T. Howell, 1942
- Genus Bafutia C.D. Adams, 1962 accepted as Emilia Cassini, 1817
- Genus Bahia Lagasca, 1816
- Genus Bahianthus R.M. King & H.E. Robinson, 1972
- Genus Bahiopsis Kellogg, 1863
- Genus Baileya W.H. Harvey & A. Gray ex J. Torrey in W.H. Emory, 1848
- Genus Baillieria Aublet, 1775 accepted as Clibadium F. Allamand ex Linnaeus, 1771
- Genus Bajacalia D.J. Loockerman, B.L. Turner & R.K. Jansen, 2003
- Genus Balbisia A.P. de Candolle, 1833
- Genus Balbisia Willdenow, 1803
- Genus Baldingeria F.W. Schmidt, 1795
- Genus Balduina Nuttall, 1818
- Genus Balladonia P.S. Short, 2016
- Genus Balsamita P. Miller, 1754 accepted as Tanacetum Linnaeus, 1753
- Genus Balsamita Desfontaines, 1792 accepted as Tanacetum Linnaeus, 1753
- Genus Balsamorhiza Nuttall, 1840
- Genus Baltimora Linnaeus, 1771
- Genus Barbellina Cassini in F. Cuvier, 1827
- Genus Barbeya N. Alboff, 1893
- Genus Barckhausenia Menke, 1854
- Genus Bardana J. Hill, 1762
- Genus Barkhausia Moench, 1794 accepted as Crepis Linnaeus, 1753
- Genus Barkleyanthus H.E. Robinson & R.D. Brettell, 1974
- Genus Barnadesia Mutis ex Linnaeus f., 1782
- Genus Barrattia A. Gray & Engelmann, 1847 accepted as Simsia Persoon, 1807
- Genus Barroetea A. Gray, 1880 accepted as Brickellia S. Elliott, 1823
- Genus Barrosoa R.M. King & H.E. Robinson, 1971
- Genus Bartlettia A. Gray, 1854
- Genus Bartlettina R.M. King & H.E. Robinson, 1971
- Genus Bartolina Adanson, 1763
- Genus Basedowia Pritzel, 1918
- Genus Basteria Houttuyn, 1776
- Genus Bathysanthus G.L. Nesom, 2018
- Genus Batopilasia G.L. Nesom & R.D. Noyes, 2000
- Genus Batschia Moench, 1794
- Genus Baucis R.A. Philippi, 1894
- Genus Baziasa Steudel, 1840
- Genus Bebbia E.L. Greene, 1885
- Genus Bechium A.P. de Candolle, 1836
- Genus Bedfordia A.P. de Candolle, 1833
- Genus Behen J. Hill, 1762
- Genus Bejaranoa R.M. King & H. Robinson, 1978
- Genus Bellardia Colla, 1835
- Genus Bellida Ewart, 1907
- Genus Bellidastrum J.A. Scopoli, 1760 accepted as Bellidiastrum J.A. Scopoli, 1760
- Genus Bellidiaster Dumortier, 1827
- Genus Bellidiastrum C.F. Lessing, 1832
- Genus Bellidiastrum J.A. Scopoli, 1760
- Genus Bellidiastrum A.H.G. de Cassini, 1816 accepted as Aster Linnaeus, 1753
- Genus Bellidiopsis (A.P. de Candolle) Spach, 1841 accepted as Osmitopsis Cassini, 1817
- Genus Belliopsis Pomel, 1860
- Genus Bellis Linnaeus, 1753
- Genus Bellium Linnaeus, 1771
- Genus Belloa E.J. Remy in C. Gay, 1848
- Genus Bembycodium G. Kunze, 1842
- Genus Benedicta Bernhardi, 1800
- Genus Benitoa Keck, 1956 accepted as Lessingia Chamisso, 1829
- Genus Bennettia S.F. Gray, 1821
- Genus Berardia Villars, 1779
- Genus Berinia Brignoli di Brunnhoff, 1810
- Genus Berkheya F. Ehrhart, 1784
- Genus Berkheyopsis O. Hoffmann in Engler & Prantl, 1893
- Genus Berlandiera A.P. de Candolle, 1836
- Genus Berniera A.P. de Candolle, 1838
- Genus Berroa Beauverd, 1913
- Genus Berthelotia A.P. de Candolle, 1836
- Genus Bertilia G.V. Cron, 2013
- Genus Berylsimpsonia B.L. Turner, 1993
- Genus Bethencourtia J.D. Choisy in C.L. von Buch, 1825
- Genus Bezanilla E.J. Remy in C. Gay, 1849
- Genus Bichenia D. Don, 1830
- Genus Bidens Linnaeus, 1753
- Genus Bidentites Heer, 1859 †
- Genus Bielzia Schur, 1866
- Genus Bigelovia accepted as Bigelowia A.P. de Candolle, 1836
- Genus Bigelowia A.P. de Candolle, 1836
- Genus Bikera Adanson, 1763
- Genus Bileveillea Vaniot, 1904
- Genus Bilgea Ş. Yıldırımlı, 2021 accepted as Gelasia Cassini, 1818
- Genus Billotia C.H. Schultz-Bipontinus, 1841
- Genus Billya Cassini in F. Cuvier, 1825 accepted as Petalacte D. Don, 1826
- Genus Bindera Rafinesque, 1838
- Genus Biolettia E.L. Greene, 1891
- Genus Biotia Cassini in F. Cuvier, 1825
- Genus Biotia A.P. de Candolle, 1836 accepted as Eurybia (Cassini) Cassini in F. Cuvier, 1820
- Genus Bipontia S.F. Blake, 1937 accepted as Soaresia C.H. Schultz-Bipontinus, 1863
- Genus Bishopalea H.E. Robinson, 1981
- Genus Bishopanthus H.E. Robinson, 1983
- Genus Bishopiella R.M. King & H.E. Robinson, 1981
- Genus Bishovia R.M. King & H. Robinson, 1978
- Genus Blainvillea Cassini in F. Cuvier, 1823
- Genus Blakeanthus R.M. King & H.E. Robinson, 1972
- Genus Blakiella Cuatrecasas, 1968
- Genus Blanchetia A.P. de Candolle, 1836
- Genus Blaxium Cassini in F. Cuvier, 1824
- Genus Blennosperma Lessing, 1832
- Genus Blennospora A. Gray, 1851
- Genus Blepharipappus W.J. Hooker, 1833
- Genus Blepharispermum A.P. de Candolle in R. Wight, 1834
- Genus Blepharizonia (A. Gray) E.L. Greene, 1885
- Genus Blumea A.P. de Candolle, 1833
- Genus Blumeopsis Gagnepain, 1920
- Genus Bocquetia Ş. Yıldırımlı, 2021 accepted as Gelasia Cassini, 1818
- Genus Boebera Willdenow, 1803 accepted as Dyssodia Cavanilles, 1801
- Genus Boeberastrum (A. Gray) Rydberg, 1915
- Genus Boeberoides (A.P. de Candolle) J.L. Strother, 1986
- Genus Bohadschia F.W. Schmidt, 1795
- Genus Bojeria A.P. de Candolle, 1836 accepted as Inula Linnaeus, 1753
- Genus Bolandia G.V. Cron, 2006
- Genus Bolanosa A. Gray, 1852
- Genus Bolocephalus Handel-Mazzetti, 1938
- Genus Bolophyta Nuttall, 1840 accepted as Parthenium Linnaeus, 1753
- Genus Boltonia L'Héritier de Brutelle, 1789
- Genus Bombycilaena (A.P. de Candolle) Smoljaninova, 1955
- Genus Borkonstia M.S. Ignatov, 1983 accepted as Aster Linnaeus, 1753
- Genus Borrichia Adanson, 1763
- Genus Borrikia Adanson, 1763
- Genus Bothriocline D. Oliver ex Bentham, 1873
- Genus Botryadenia F.E.L. Fischer & C.A. Meyer, 1836
- Genus Bourdonia E.L. Greene, 1893 accepted as Chaetopappa A.P. de Candolle, 1836
- Genus Bourgaea Cosson, 1849
- Genus Bowmania G. Gardner, 1843
- Genus Brachanthemum A.P. de Candolle, 1838
- Genus Brachionostylum Mattfeld, 1932
- Genus Brachyachenium J.G. Baker, 1890
- Genus Brachyactis Ledebour, 1845
- Genus Brachyandra R.A. Philippi, 1860 accepted as Helogyne Nuttall, 1841
- Genus Brachyaster Ambrosi, 1857
- Genus Brachychaeta Torrey & A. Gray, 1842 accepted as Solidago Linnaeus, 1753
- Genus Brachyclados Gillies ex D. Don, 1832
- Genus Brachycome Cassini, 1825 accepted as Brachyscome Cassini, 1816
- Genus Brachyderea Cassini in F. Cuvier, 1827
- Genus Brachyglottis J.R. Forster & J.G.A. Forster, 1775
- Genus Brachygyne Cassini, 1827 accepted as Eriocephalus Linnaeus, 1753
- Genus Brachylaena R. Brown, 1817
- Genus Brachymeris A.P. de Candolle, 1837 accepted as Phymaspermum Lessing, 1832
- Genus Brachyonostylum Mattfeld accepted as Brachionostylum Mattfeld, 1932
- Genus Brachypappus C.H. Schultz-Bipontinus, 1855
- Genus Brachyramphus A.P. de Candolle, 1838 accepted as Launaea Cassini in F. Cuvier, 1822
- Genus Brachyrhynchos Lessing, 1832
- Genus Brachyridium Meisner, 1839
- Genus Brachyris Nuttall, 1818 accepted as Gutierrezia Lagasca, 1816
- Genus Brachyrynchos Lessing, 1832
- Genus Brachyscome Cassini, 1816
- Genus Brachystephium Lessing, 1832
- Genus Brachythrix H. Wild & G.V. Pope, 1978
- Genus Bracteantha A.A. Anderberg & L. Haegi in A.A. Anderberg, 1991 accepted as Xerochrysum N.N. Tzvelev, 1990
- Genus Bracyrhamphus accepted as Launaea Cassini in F. Cuvier, 1822
- Genus Bradburia J. Torrey & A. Gray, 1842 accepted as Chrysopsis (Nuttall) S. Elliott, 1823
- Genus Brasilia G.M. Barroso, 1962 accepted as Calea Linnaeus, 1763
- Genus Brassavola Adanson, 1763
- Genus Brauneria Necker ex T.C. Porter & N.L. Britton, 1894 accepted as Echinacea Moench, 1794
- Genus Breea Lessing, 1832
- Genus Brenandendron H.E. Robinson, 1999
- Genus Brephocton Rafinesque, 1837
- Genus Breteuillia Buchoz, 1785 accepted as Didelta L'Héritier de Brutelle, 1786
- Genus Brickellia S. Elliott, 1823
- Genus Brickelliastrum R.M. King & H.E. Robinson, 1972
- Genus Bridgesia W.J. Hooker, 1831
- Genus Brintonia E.L. Greene, 1895
- Genus Brocchia Visiani, 1836
- Genus Brotera K.P.J. Sprengel, 1801
- Genus Brotera Willdenow, 1803 accepted as Cardopatium A.L. Jussieu, 1805
- Genus Broteroa C.E.O. Kuntze, 1891 accepted as Cardopatium A.L. Jussieu, 1805
- Genus Bryomorphe W.H. Harvey, 1863
- Genus Bubonium J. Hill, 1761 accepted as Asteriscus P. Miller, 1754
- Genus Bulbostylis A.P. de Candolle, 1836 accepted as Coleostephus Cassini in F. Cuvier, 1826
- Genus Buphtalmum Linnaeus, 1753
- Genus Buphthalmum P. Miller, 1754
- Genus Buphthalmum Linnaeus, 1753
- Genus Burkartia J.V. Crisci, 1976
- Genus Burnellia Mesfin Tadesse & D.J. Crawford, 2023
- Genus Burrielia A.P. de Candolle, 1836
- Genus Bustia Adanson, 1763 accepted as Buphthalmum Linnaeus, 1753
- Genus Caatinganthus H.E. Robinson, 1999
- Genus Cabobanthus H.E. Robinson, 1999
- Genus Cabralia F. von Paula von Schrank in P. Leandro de Sacramento, 1821
- Genus Cabreraea J.M. Bonifacino, 2009
- Genus Cabreriella J. Cuatrecasas, 1980
- Genus Cacalia O. Kuntze, 1891
- Genus Cacalia Linnaeus, 1753 accepted as Adenostyles Cassini in F. Cuvier, 1816
- Genus Cacaliopsis A. Gray, 1883
- Genus Cacosmia Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Cacotanis Rafinesque, 1837
- Genus Cadiscus E.H.F. Meyer ex A.P. de Candolle, 1838 accepted as Senecio Linnaeus, 1753
- Genus Caelestina Cassini, 1817
- Genus Caenotus (Nuttall) Rafinesque, 1837
- Genus Caesulia Roxburgh, 1798
- Genus Calais A.P. de Candolle, 1838 accepted as Microseris D. Don, 1832
- Genus Calanticaria (B.L. Robinson & J.M. Greenman) E.E. Schilling & J.L. Panero, 2002
- Genus Calcalia Krocker, 1790
- Genus Calcitrapa Heister ex Fabricius, 1759
- Genus Calcitrapa J. Hill, 1762
- Genus Calcitrapoides Fabricius, 1759
- Genus Calea Linnaeus, 1763
- Genus Caleacte C.F. Lessing in D.F.L. von Schlechtendal & A. de Chamisso, 1830
- Genus Calebrachys Cassini in F. Cuvier, 1828
- Genus Calendella O. Kuntze, 1898
- Genus Calendula Linnaeus, 1753
- Genus Caleopsis Fedde, 1910 accepted as Goldmanella Greenman, 1908
- Genus Calhounia A. Nelson, 1924
- Genus Calimeris C.G.D. Nees, 1832 accepted as Kalimeris H. Cassini in F. Cuvier, 1822
- Genus Calliachyris J. Torrey & A. Gray, 1845
- Genus Callicephalus C.A. Meyer, 1831
- Genus Callichroa F.E.L. Fischer & C.A. Meyer, 1836 accepted as Layia W.J. Hooker & Arnott ex A.P. de Candolle, 1838
- Genus Callicornia N.L. Burman, 1768 accepted as Asteropterus Adanson, 1763
- Genus Calliglossa W.J. Hooker & Arnott, 1839
- Genus Callilepis A.P. de Candolle, 1836
- Genus Calliopea D. Don, 1829
- Genus Calliopsis H.G.L. Reichenbach, 1823 accepted as Coreopsis Linnaeus, 1753
- Genus Callipappus Meyen, 1834 accepted as Calopappus F.J.F. Meyen, 1834
- Genus Callisia Linnaeus, 1760
- Genus Callistemma Cassini, 1817 accepted as Callistephus Cassini in F. Cuvier, 1825
- Genus Callistephus Cassini in F. Cuvier, 1825
- Genus Calocephalus R. Brown, 1817
- Genus Calodonta Nuttall, 1841
- Genus Calomeria Ventenat, 1804
- Genus Calonnea Buchoz, 1786
- Genus Calopappus F.J.F. Meyen, 1834
- Genus Caloptilium Lagasca, 1811
- Genus Calorezia J.L. Panero, 2007 accepted as Perezia Lagasca, 1811
- Genus Caloseris Bentham, 1841
- Genus Calostephane Bentham, 1872
- Genus Calotesta P.O. Karis, 1990
- Genus Calotis R. Brown, 1820
- Genus Caltha P. Miller, 1754
- Genus Calycadenia A.P. de Candolle, 1836
- Genus Calycocorsus F.W. Schmidt, 1795 accepted as Willemetia Necker, 1777-1778
- Genus Calycoseris A. Gray, 1853
- Genus Calydermos Lagasca, 1816
- Genus Calymmandra Torrey & A. Gray, 1842 accepted as Diaperia Nuttall, 1840
- Genus Calyptocarpus Lessing, 1832
- Genus Camchaya Gagnepain, 1920 accepted as Vernonia Schreber, 1791
- Genus Campovassouria R.M. King & H.E. Robinson, 1971
- Genus Camptacra N.T. Burbidge, 1982
- Genus Campuloclinium A.P. de Candolle, 1836
- Genus Campylotheca Cassini in F. Cuvier, 1827 accepted as Bidens Linnaeus, 1753
- Genus Canadanthus G.L. Nesom, 1995
- Genus Canariothamnus B. Nordenstam, 2006 accepted as Bethencourtia J.D. Choisy in C.L. von Buch, 1825
- Genus Cancrinia Karelin & Kirilov, 1842
- Genus Cancriniella N.N. Tzvelev in B.K. Schischkin & E.G. Bobrov, 1961
- Genus Candidea M. Tenore, 1839
- Genus Candollea Ş. Yıldırımlı, 2021 accepted as Kandemiria Ş. Yıldırımlı in Yıldırımlı & Doğru Koca, 2022
- Genus Capelio B. Nordenstam, 2002
- Genus Caputia B. Nordenstam & P.B. Pelser, 2012
- Genus Caradesia Rafinesque, 1838
- Genus Caramanica Tineo, 1846
- Genus Carbeni Adanson, 1763
- Genus Carderina (Cassini) Cassini in F. Cuvier, 1827 accepted as Senecio Linnaeus, 1753
- Genus Cardiagyris G.L. Nesom, 2020
- Genus Cardonaea L. Aristeguieta, B. Maguire & J.A. Steyermark in J.A. Steyermark, B. Maguire et al., 1972 accepted as Gongylolepis R. Schomburgk, 1847
- Genus Cardopatium A.L. Jussieu, 1805
- Genus Cardosanctus Bubani, 1899
- Genus Cardosoa S. Ortiz & J.A.R. Paiva in S. Ortiz, 2010
- Genus Carduncellus Adanson, 1763 accepted as Carthamus Linnaeus, 1753
- Genus Carduocirsium E.C. Sennen in E.C. Sennen & P. Fournier, 1933
- Genus Carduogalactites P.V. Fournier, 1940
- Genus Carduus Linnaeus, 1753
- Genus Carelia A.L. Jussieu ex Cavanilles, 1803 accepted as Mikania Willdenow, 1803
- Genus Carelia Lessing, 1832
- Genus Carelia Fabricius, 1759
- Genus Cargila Rafinesque, 1840
- Genus Cargilla Adanson, 1763
- Genus Carlina Linnaeus, 1753
- Genus Carlowizia Moench, 1802
- Genus Carlquistia B.G. Baldwin, 1999
- Genus Carmelita C. Gay ex A.P. de Candolle, 1838
- Genus Carminatia Moçiño ex A.P. de Candolle, 1838
- Genus Carpesium Linnaeus, 1753
- Genus Carphephorus Cassini, 1816
- Genus Carphochaete A. Gray, 1849
- Genus Carpholoma D. Don, 1826
- Genus Carphopappus C.H. Schultz-Bipontinus in Walpers, 1843
- Genus Carphostephium Cassini in F. Cuvier, 1826
- Genus Carramboa J. Cuatrecasas, 1976
- Genus Carterothamnus R.M. King, 1967 accepted as Hofmeisteria Walpers, 1846
- Genus Cartesia Cassini, 1816
- Genus Carthamodes O. Kuntze, 1891
- Genus Carthamoides N.M. Wolf, 1776
- Genus Carthamus Linnaeus, 1753
- Genus Cassinia R. Brown, 1817
- Genus Cassinia R. Brown in W.T. Aiton, 1813
- Genus Castalis Cassini in F. Cuvier, 1824 accepted as Dimorphotheca S. Vaillant, 1754
- Genus Castanedia accepted as Castenedia R.M. King & H. Robinson, 1978
- Genus Castenedia R.M. King & H. Robinson, 1978
- Genus Castra Vellozo, 1829
- Genus Castrilanthemum R. Vogt & C. Oberprieler, 1996
- Genus Castroviejoa M. Galbany, L. Sáez & C. Benedí, 2004
- Genus Catamixis T. Thomson, 1867
- Genus Catananche Linnaeus, 1753
- Genus Catatia Humbert, 1923
- Genus Cathamus accepted as Carthamus Linnaeus, 1753
- Genus Catolesia D.J.N. Hind, 2000
- Genus Catonia Moench, 1794
- Genus Caucasalia R.B. Nordenstam, 1997
- Genus Caucasoseris M. Güzel, N. Kilian, Sennikov & Coşkunçelebi, 2022
- Genus Cavalcantia R.M. King & H.E. Robinson, 1980
- Genus Cavea W.W. Smith & J.K. Small, 1917
- Genus Caxamarca M.O. Dillon & A. Sagástegui, 1999
- Genus Celmearia P. Heenan, 1993
- Genus Celmisia Cassini in F. Cuvier, 1825
- Genus Celmisia Cassini, 1817
- Genus Cenia Commerson ex A.L. Jussieu, 1789
- Genus Cenocline K.H.E. Koch, 1843
- Genus Centaurea Linnaeus, 1753
- Genus Centaureopappus Heydt, 1932
- Genus Centauridium Torrey & A. Gray, 1842
- Genus Centaurium A. Haller, 1768
- Genus Centaurodendron Johow, 1896
- Genus Centauropsis Bojer ex A.P. de Candolle, 1836
- Genus Centaurothamnus G. Wagenitz & M. Dittrich in G. Wagenitz, M. Dittrich & J. Damboldt, 1982
- Genus Centauserratula J. Arènes, 1952
- Genus Centenaria P. Gonzáles, A. Cano & H. Robinson, 2018
- Genus Centipeda Loureiro, 1790
- Genus Centrachena Schott ex H.G.L. Reichenbach, 1827
- Genus Centrapalus Cassini, 1817
- Genus Centratherum Cassini, 1817
- Genus Centrocarpha D. Don in Sweet, 1831 accepted as Rudbeckia Linnaeus, 1753
- Genus Centroclinium D. Don, 1830
- Genus Centromadia E.L. Greene, 1894
- Genus Centropappus J.D. Hooker, 1847
- Genus Centrospermum Kunth in Humboldt, Bonpland & Kunth, 1818 accepted as Acanthospermum Schrank, 1820
- Genus Centrospermum K.P.J. Sprengel, 1818
- Genus Cephalipterum A. Gray, 1852
- Genus Cephalobembix Rydberg, 1914 accepted as Schkuhria A.W. Roth, 1797
- Genus Cephalonoplos (Necker ex A.P. de Candolle) Fourreau, 1869
- Genus Cephalopappus C.G.D. Nees & C.F.P. Martius, 1824
- Genus Cephalophora Cavanilles, 1801 accepted as Helenium Linnaeus, 1753
- Genus Cephalorhyncus P.E. Boissier accepted as Cephalorrhynchus Boissier, 1844
- Genus Cephalorrhynchus Boissier, 1844
- Genus Cephaloseris Poeppig ex H.G.L. Reichenbach, 1829
- Genus Cephalosorus A. Gray, 1851
- Genus Ceradia J. Lindley, 1845
- Genus Ceramiocephalum C.H. Schultz-Bipontinus, 1862
- Genus Ceratella J.D. Hooker, 1844
- Genus Ceratocephalus O. Kuntze, 1891 accepted as Acmella L.C.M. Richard in Persoon, 1807
- Genus Ceratogyne Turczaninow, 1851
- Genus Cercostylos Lessing, 1832
- Genus Ceruana Forsskål, 1775
- Genus Cestrinus Cassini in F. Cuvier, 1817
- Genus Chabraea A.P. de Candolle, 1812
- Genus Chacoa R.M. King & H.E. Robinson, 1975
- Genus Chaenactis A.P. de Candolle, 1836
- Genus Chaenocephalus Grisebach, 1861 accepted as Verbesina Linnaeus, 1753
- Genus Chaetacalia J.F. Pruski, 2021
- Genus Chaetachlaena D. Don, 1830
- Genus Chaetadelpha A. Gray ex S. Watson, 1873
- Genus Chaetadelphia accepted as Chaetadelpha A. Gray ex S. Watson, 1873
- Genus Chaetanthera Ruiz & Pavon, 1794
- Genus Chaetanthera Nuttall, 1834
- Genus Chaetaphora Nuttall, 1837
- Genus Chaetopappa A.P. de Candolle, 1836
- Genus Chaetoseris C. Shih, 1991
- Genus Chaetospira S.F. Blake, 1935 accepted as Pseudelephantopus Rohr, 1792
- Genus Chaetymenia W.J. Hooker & Arnott, 1838
- Genus Chamaechaenactis Rydberg, 1906
- Genus Chamaegeron A.G. Schrenk, 1845
- Genus Chamaeleon I.F. Tausch, 1828
- Genus Chamaeleon Cassini in F. Cuvier, 1827
- Genus Chamaemelum Visiani, 1845
- Genus Chamaemelum P. Miller, 1754
- Genus Chamaepeuce A.P. de Candolle, 1837 accepted as Ptilostemon Cassini, 1816
- Genus Chamaepus G. Wagenitz in G. Georgiadou et al., 1980
- Genus Chamaesphaerion A. Gray, 1851
- Genus Chamaestephanum Willdenow, 1807
- Genus Chamaezelum Link, 1829
- Genus Chamalium Cassini, 1827
- Genus Chamalium A.L. Jussieu, 1805
- Genus Chamartemisia Rydberg, 1916 accepted as Artemisia Linnaeus, 1753
- Genus Chamissomneia O. Kuntze, 1891 accepted as Schlechtendalia Lessing, 1830
- Genus Chamomilla S.F. Gray, 1821 accepted as Matricaria Linnaeus, 1753
- Genus Chamomilla Godron, 1843
- Genus Chaochienchangia G.L. Nesom, 2020
- Genus Chaptalia Ventenat, 1802
- Genus Charadranaetes J.P. Janovec & H. Robinson, 1997
- Genus Chardinia Desfontaines, 1817
- Genus Charieis Cassini, 1817 accepted as Felicia Cassini, 1818
- Genus Chartolepis Cassini in F. Cuvier, 1826 accepted as Centaurea Linnaeus, 1753
- Genus Chatiakella Cassini in F. Cuvier, 1823
- Genus Cheilodiscus Triana, 1858
- Genus Cheirolepis Boissier, 1849 accepted as Centaurea Linnaeus, 1753
- Genus Cheiroloma F. von Mueller, 1853 accepted as Calotis R. Brown, 1820
- Genus Cheirolophus Cassini in F. Cuvier, 1827
- Genus Cherina Cassini, 1817
- Genus Chersodoma R.A. Philippi, 1891
- Genus Chevreulia Cassini, 1817
- Genus Chihuahuana L.E. Urbatsch & R.P. Roberts, 2004
- Genus Childsia J.L. Childs, 1899
- Genus Chiliadenus Cassini in F. Cuvier, 1825
- Genus Chiliocephalum Bentham, 1873
- Genus Chiliophyllum R.A. Philippi, 1864
- Genus Chiliophyllum A.P. de Candolle, 1836
- Genus Chiliotrichiopsis A.L. Cabrera, 1937
- Genus Chiliotrichum Cassini, 1817
- Genus Chimantaea Maguire, Steyermark & Wurdack, 1957
- Genus Chionolaena A.P. de Candolle, 1836
- Genus Chionopappus Bentham in Bentham & J.D. Hooker, 1873
- Genus Chionoptera A.P. de Candolle, 1838
- Genus Chirolophus Cassini in F. Cuvier, 1827
- Genus Chlaenobolus Cassini in F. Cuvier, 1827
- Genus Chlamydites J.R. Drummond, 1907
- Genus Chlamydophora Ehrenberg ex Lessing, 1832
- Genus Chlamysperma Lessing, 1832
- Genus Chloracantha G.L. Nesom, Y.B. Suh, D.R. Morgan, S.D. Sudberg & B.B. Simpson, 1991
- Genus Chlorocrepis A. Grisebach, 1853
- Genus Choeroseris Link, 1829
- Genus Chondrilla Linnaeus, 1753
- Genus Chondrochilus R.A. Philippi, 1858
- Genus Chondrophora Rafinesque ex T.C. Porter & N.L. Britton, 1894
- Genus Chondropyxis D.A. Cooke in J.P. Jessop & H.R. Toelken, 1986
- Genus Chone Dulac, 1867
- Genus Chorisis A.P. de Candolle, 1838 accepted as Ixeris (Cassini) Cassini in F. Cuvier, 1822
- Genus Chorisiva (A. Gray) Rydberg, 1922
- Genus Chorisma D. Don, 1829
- Genus Choristea Thunberg, 1800
- Genus Chresta Vellozo ex A.P. de Candolle, 1836
- Genus Chroilema Bernhardi in Schlechtendal, 1841
- Genus Chromatolepis Dulac, 1867
- Genus Chromatopogon F.W. Schmidt, 1795
- Genus Chromochiton Cassini in F. Cuvier, 1828
- Genus Chromolaena A.P. de Candolle, 1836
- Genus Chromolepis Bentham, 1840
- Genus Chronopappus A.P. de Candolle, 1836
- Genus Chrysaboltonia G. Arends ex K. Heydenreich, 1938
- Genus Chrysactinia A. Gray, 1849
- Genus Chrysactinium (Kunth) Weddell, 1857
- Genus Chrysanthellina Cassini in F. Cuvier, 1822
- Genus Chrysanthellum Persoon, 1807
- Genus Chrysanthemoachillea J. Prodan, 1931
- Genus Chrysanthemoides Fabricius, 1759
- Genus Chrysanthemoides Medikus, 1789 accepted as Chrysanthemoides Fabricius, 1759
- Genus Chrysanthemum Linnaeus, 1753
- Genus Chrysanthoglossum B.H. Wilcox, K. Bremer & C.J. Humphries in K. Bremer & C.J. Humphries, 1993
- Genus Chryseis Cassini, 1817 accepted as Amberboa (Persoon) Lessing, 1832
- Genus Chryselium E. Urtubey & S.E. Freire in Freire & Urtubey, 2019
- Genus Chrysocephalum Walpers, 1841
- Genus Chrysocoma Linnaeus, 1753
- Genus Chrysocoryne Endlicher, 1843 accepted as Gnephosis Cassini, 1820
- Genus Chrysodiscus Steetz in J.G.C. Lehmann, 1845
- Genus Chrysogonum Linnaeus, 1753
- Genus Chrysolaena H.E. Robinson, 1988
- Genus Chrysoma Nuttall, 1834
- Genus Chrysomelea Tausch, 1823
- Genus Chrysopappus Takhtajan, 1938 accepted as Centaurea Linnaeus, 1753
- Genus Chrysopelta I.F. Tausch, 1821
- Genus Chrysophania Kunth ex Lessing, 1832
- Genus Chrysophtalmum C.H. Schultz-Bipontinus ex Walpers, 1843 accepted as Chrysophthalmum C.H. Schultz Bipontinus, 1843
- Genus Chrysophthalmum R.A. Philippi, 1858
- Genus Chrysophthalmum C.H. Schultz Bipontinus, 1843
- Genus Chrysopsis (Nuttall) S. Elliott, 1823
- Genus Chrysostemma Lessing, 1832 accepted as Anacis Schrank, 1817
- Genus Chrysothamnus Nuttall, 1840
- Genus Chthonia Cassini, 1817
- Genus Chthonocephalus Steetz in J.G.C. Lehmann, 1845
- Genus Chucoa Cabrera, 1955
- Genus Chuquiraga A.L. Jussieu, 1789
- Genus Chylodia L.C. Richard ex Cassini in F. Cuvier, 1823
- Genus Cicerbita Wallroth, 1822
- Genus Ciceronia Urban, 1925
- Genus Cichorium Linnaeus, 1753
- Genus Cigdemia Ş. Yıldırımlı, 2021 accepted as Gelasia Cassini, 1818
- Genus Cinara P. Miller, 1754
- Genus Cineraria Linnaeus, 1763
- Genus Cirsellium J. Gaertner, 1791
- Genus Cirsiocarduus P. Fournier, 1928 accepted as Cirsio-Carduus P. Fournier, 1928
- Genus Cirsio-Carduus P. Fournier, 1928
- Genus Cirsium P. Miller, 1754
- Genus Cissampelopsis (A.P. de Candolle) Miquel, 1856
- Genus Cistrum J. Hill, 1762
- Genus Cladanthus Cassini, 1816
- Genus Cladochaeta A.P. de Candolle, 1838
- Genus Cladopogon C.H. Schultz-Bipontinus ex J.G.C. Lehmann & E. Otto, 1853
- Genus Cladoseris (Lessing) Spach, 1841
- Genus Clairvillea A.P. de Candolle, 1836
- Genus Claotrachelus Zollinger & Moritzi ex Zollinger, 1845
- Genus Clappia A. Gray in J. Torrey, 1859
- Genus Clarionea Lagasca ex A.P. de Candolle, 1812
- Genus Clavena A.P. de Candolle, 1838
- Genus Clavigera A.P. de Candolle, 1836 accepted as Brickellia S. Elliott, 1823
- Genus Cleanthes D. Don, 1830
- Genus Cleistanthium G. Kunze, 1851 accepted as Gerbera Linnaeus, 1758
- Genus Cleitria H.A. Schrader, 1831
- Genus Clibadium F. Allamand ex Linnaeus, 1771
- Genus Clipteria Rafinesque, 1837
- Genus Cloiselia S.M. Moore, 1906
- Genus Clomenocoma Cassini, 1816
- Genus Clomium Adanson, 1763
- Genus Closia Rémy in C. Gay, 1849
- Genus Closirospermum Necker ex Ruprecht, 1860
- Genus Clybatis R.A. Philippi, 1872 accepted as Leucheria Lagasca, 1811
- Genus Cnicothamnus Grisebach, 1874
- Genus Cnicus Linnaeus, 1753 accepted as Centaurea Linnaeus, 1753
- Genus Codonocephalum Fenzl, 1843 accepted as Inula Linnaeus, 1753
- Genus Coelestina J. Hill, 1761
- Genus Coelestina Cassini, 1817 accepted as Ageratum Linnaeus, 1753
- Genus Coespeletia J. Cuatrecasas, 1976
- Genus Coinogyne Lessing, 1831
- Genus Coleocoma F. von Mueller, 1857
- Genus Coleosanthus Cassini, 1817 accepted as Brickellia S. Elliott, 1823
- Genus Coleostephus Cassini in F. Cuvier, 1826
- Genus Collaea K.P.J. Sprengel, 1826
- Genus Colobanthera Humbert, 1923
- Genus Colobium A.W. Roth, 1796
- Genus Colobogyne Gagnepain, 1920 accepted as Acmella L.C.M. Richard in Persoon, 1807
- Genus Cololobus H.E. Robinson, 1994
- Genus Columbiadoria G.L. Nesom, 1991
- Genus Columellea N.J. Jacquin, 1798
- Genus Colycea J. Fernández Casas & A. Susanna, 1982
- Genus Colymbacosta S. Rauschert, 1973
- Genus Colymbada J. Hill, 1762
- Genus Comaclinium Scheidweiler & J.E. Planchon, 1852
- Genus Comborhiza A.A. Anderberg & K. Bremer, 1991
- Genus Commidendrum A.P. de Candolle, 1833
- Genus Complaya J.L. Strother, 1991 accepted as Sphagneticola O. Hoffmann, 1900
- Genus Comptonanthus R.B. Nordenstam, 1964 accepted as Ifloga Cassini, 1819
- Genus Conanthodium A. Gray, 1852
- Genus Condylidium R.M. King & H.E. Robinson, 1972
- Genus Condylopodium R.M. King & H.E. Robinson, 1972
- Genus Coniothele A.P. de Candolle, 1836
- Genus Conocliniopsis R.M. King & H.E. Robinson, 1972
- Genus Conoclinium A.P. de Candolle, 1836
- Genus Conophora (A.P. de Candolle) Nieuwland, 1914 accepted as Arnoglossum Rafinesque, 1817
- Genus Constancea B.G. Baldwin, 2000
- Genus Contarena Adanson, 1763
- Genus Conygeron J. Holub, 1973
- Genus Conysa Adanson, 1763 accepted as Conyza Linnaeus, 1753
- Genus Conyza Lessing, 1832
- Genus Conyza J. Hill, 1756
- Genus Conyza Linnaeus, 1753
- Genus Conyzanthus S.G. Tamamschjan in B.K. Schischkin, 1959 accepted as Aster Linnaeus, 1753
- Genus Conyzella Fabricius, 1759
- Genus Conyzigeron S. Rauschert, 1973
- Genus Conyzoides Fabricius, 1759
- Genus Cordiofontis G.L. Nesom, 2020
- Genus Coreacis H.N. Sun & Z.H. Feng in Feng et al., 2024 accepted as Epilepis Bentham, 1839
- Genus Coreocarpus Bentham, 1844
- Genus Coreopsis Linnaeus, 1753
- Genus Coreopsoides Moench, 1794
- Genus Corethamnium R.M. King & H. Robinson, 1978
- Genus Corethrogyne A.P. de Candolle, 1836
- Genus Coronidium P.G. Wilson, 2008
- Genus Coronocarpus H.C.F. Schumacher, 1827 accepted as Aspilia L.M.A.A. Du Petit-Thouars, 1806
- Genus Correllia A.M. Powell, 1973
- Genus Corvisartia Mérat, 1812
- Genus Corymbium Linnaeus, 1753
- Genus Corynanthelium G. Kunze, 1847
- Genus Cosmidium Nuttall, 1841 accepted as Thelesperma Lessing, 1831
- Genus Cosmophyllum K.H.E. Koch, 1855
- Genus Cosmos Cavanilles, 1791
- Genus Cota J. Gay ex Gussone, 1845 (?)
- Genus Cotula Linnaeus, 1753
- Genus Cotulina Pomel, 1874
- Genus Coulterella G. Vasey & J.N. Rose, 1890
- Genus Courrantia C.H. Schultz-Bipontinus in P.B. Webb & S. Berthelot, 1844
- Genus Cousinia Cassini in F. Cuvier, 1827
- Genus Cousiniopsis Nevski, 1937
- Genus Covola Necker ex Rafinesque, 1820
- Genus Crantzia Vellozo, 1831
- Genus Craspedia J.G.A. Forster, 1786
- Genus Crassina C. Scepin, 1758 accepted as Zinnia Linnaeus, 1759
- Genus Crassocephalum Moench, 1794
- Genus Crassothonna B. Nordenstam, 2012
- Genus Cratystylis S. Moore, 1905
- Genus Cremanthodium Bentham, 1873
- Genus Cremnothamnus C.F. Puttock, 1994
- Genus Cremocephalum Cassini in F. Cuvier, 1825
- Genus Crenamon Rafinesque, 1838
- Genus Crenamum Adanson, 1763
- Genus Crepidiastrixeris S. Kitamura, 1937
- Genus Crepidiastrum Nakai, 1920
- Genus Crepidifolium A.N. Sennikov, 2007
- Genus Crepidispermum E.M. Fries, 1862
- Genus Crepidium Tausch, 1828
- Genus Crepidopsis C. Arvet-Touvet, 1897 accepted as Hieracium Linnaeus, 1753
- Genus Crepihieracium P. Fournier, 1928
- Genus Crepi-Hieracium P. Fournier, 1928 accepted as Crepihieracium P. Fournier, 1928
- Genus Crepinia H.G.L. Reichenbach in J.C. Mössler, 1829
- Genus Crepis Linnaeus, 1753
- Genus Crepula J. Hill, 1762
- Genus Crinita Moench, 1794
- Genus Crinitaria Cassini in F. Cuvier, 1825 accepted as Aster Linnaeus, 1753
- Genus Criscia L. Katinas, 1994
- Genus Criscianthus M.A. Grossi & J.N. Nakajima in Grossi et al., 2013
- Genus Critonia P. Browne, 1756
- Genus Critoniadelphus R.M. King & H.E. Robinson, 1971
- Genus Critoniella R.M. King & H. Robinson, 1975
- Genus Critoniopsis C.H. Schultz-Bipontinus, 1863
- Genus Crocidium W.J. Hooker, 1833
- Genus Crociseris (H.G.L. Reichenbach) Fourreau, 1868
- Genus Crockeria E.L. Greene ex A. Gray, 1884
- Genus Crocodilina Bubani, 1899
- Genus Crocodilium J. Hill, 1762
- Genus Crocodilodes Adanson, 1763
- Genus Cronquistia R.M. King, 1968 accepted as Carphochaete A. Gray, 1849
- Genus Cronquistianthus R.M. King & H.E. Robinson, 1972
- Genus Croptilon Rafinesque, 1837
- Genus Crossolepis Lessing, 1832
- Genus Crossolepis Bentham in Endlicher et al., 1837
- Genus Crossostephium Lessing, 1831
- Genus Crossothamnus R.M. King & H.E. Robinson, 1972
- Genus Crupina (Persoon) A.P. de Candolle, 1810
- Genus Cryanthemum R.V. Kamelin in T.A. Adylov & T.I. Zuckerwanik, 1993
- Genus Cryphiospermum Palisot de Beauvois, 1810
- Genus Cryptadia Lindley ex Endlicher, 1841
- Genus Cryptogyne Cassini in F. Cuvier, 1827
- Genus Cryptopetalon Cassini, 1817
- Genus Cryptopleura Nuttall, 1841
- Genus Cryptostemma R. Brown in W.T. Aiton, 1813 accepted as Arctotheca J.C. Wendland, 1798
- Genus Crystallopollen Steetz in Peters, 1864 accepted as Polydora E. Fenzl, 1844
- Genus Ctenosperma J.D. Hooker, 1847
- Genus Cuatrecasanthus H.E. Robinson, 1989
- Genus Cuatrecasasiella H.E. Robinson, 1985
- Genus Cuchumatanea Seidenschnur & Beaman, 1966
- Genus Culcitium Bonpland in Humboldt & Bonpland, 1808 accepted as Senecio Linnaeus, 1753
- Genus Cullumia R. Brown in W.T. Aiton, 1813
- Genus Cullumiopsis Drake del Castillo, 1899
- Genus Cuniculotinus L.E. Urbatsch, R.P. Roberts & K.M. Neubig, 2005
- Genus Cunigunda Bubani, 1899
- Genus Cupidone Lemaire in A.C.V.D. d'Orbigny, 1849
- Genus Cupidonia Bubani, 1899
- Genus Cupularia Godron & Grenier ex Godron in Grenier & Godron, 1851 (?)
- Genus Curio P.V. Heath, 1997
- Genus Cursonia Nuttall, 1841
- Genus Cuspidia J. Gaertner, 1791
- Genus Cyananthus Rafinesque, 1815
- Genus Cyanastrum Cassini, 1826 accepted as Volutaria Cassini, 1816
- Genus Cyanopis Blume, 1828
- Genus Cyanopsis Cassini, 1816 accepted as Volutaria Cassini, 1816
- Genus Cyanoseris (W.D.J. Koch) Schur, 1853
- Genus Cyanthillium Blume, 1826
- Genus Cyanus P. Miller, 1754 accepted as Centaurea Linnaeus, 1753
- Genus Cyathidium Lindley ex Royle, 1835
- Genus Cyathocephalum Nakai, 1915
- Genus Cyathocline Cassini, 1829
- Genus Cyathomone S.F. Blake, 1923
- Genus Cyathopappus C.H. Schultz-Bipontinus, 1861
- Genus Cyathopappus F. von Mueller, 1861
- Genus Cyclachaena Fresenius, 1836
- Genus Cyclolepis Gillies ex D. Don, 1832
- Genus Cycnoseris Endlicher, 1843
- Genus Cylindrocline Cassini, 1817
- Genus Cylindrosorus Bentham in Endlicher et al., 1837
- Genus Cymbia (Torry & A. Gray) Standley, 1911
- Genus Cymbolaena Smoljan, 1955 accepted as Filago Linnaeus, 1753
- Genus Cymbonotus Cassini in F. Cuvier, 1825
- Genus Cymbopappus B. Nordenstam, 1976
- Genus Cymboseris Boissier, 1849
- Genus Cymophora B.L. Robinson, 1907 accepted as Tridax Linnaeus, 1753
- Genus Cynara Linnaeus, 1753
- Genus Cynarocephalus F. von Kerner, 1916 †
- Genus Cynaroides (Boissier ex Walpers) J. Dostál, 1973 accepted as Centaurea Linnaeus, 1753
- Genus Cynaropsis C.E.O. Kuntze, 1903 accepted as Cynara Linnaeus, 1753
- Genus Cynotis Hoffmannsegg, 1826
- Genus Cynthia D. Don, 1829 accepted as Krigia Schreber, 1791
- Genus Cypselites Heer, 1859 †
- Genus Cypselodontia A.P. de Candolle, 1838
- Genus Cyrtocymura H.E. Robinson, 1987
- Genus Cyrtolepis Lessing, 1831
- Genus Cyttarium Petermann, 1838
- Genus Dacryotrichia H. Wild, 1973
- Genus Dadia Vellozo, 1829
- Genus Dahlia Cavanilles, 1791
- Genus Dalea P. Browne, 1756 accepted as Critonia P. Browne, 1756
- Genus Damatris Cassini, 1817
- Genus Damironia Cassini in F. Cuvier, 1828
- Genus Damnamenia D.R. Given, 1973
- Genus Damnxanthodium J.L. Strother, 1987
- Genus Danaa Colla, 1835
- Genus Darwiniothamnus G. Harling, 1962 accepted as Erigeron Linnaeus, 1753
- Genus Dasiorima Rafinesque, 1837
- Genus Dasyandantha H.E. Robinson, 1993
- Genus Dasyanthina H.E. Robinson, 1993
- Genus Dasyanthus Bubani, 1899
- Genus Dasycondylus R.M. King & H.E. Robinson, 1972
- Genus Dasyphyllum Kunth in Humboldt, Bonpland & Kunth, 1828
- Genus Daumailia J. Arènes, 1948 accepted as Urospermum Scopoli, 1777
- Genus Dauresia B. Nordenstam & P.B. Pelser, 2005
- Genus Daveana Willkomm ex Mariz, 1891
- Genus Daveaua Willkomm ex Mariz, 1891
- Genus Davilanthus E.E. Schilling & J.L. Panero, 2010
- Genus Decachaeta A.P. de Candolle, 1836
- Genus Decaneuropsis H.E. Robinson & J.J. Skvarla, 2007
- Genus Decaneurum C.H. Schultz-Bipontinus, 1844
- Genus Decaneurum A.P. de Candolle, 1833
- Genus Decastylocarpus Humbert, 1923
- Genus Decazesia F. von Mueller, 1879
- Genus Deckera C.H. Schultz-Bipontinus, 1834
- Genus Dectis Rafinesque, 1837
- Genus Deinandra E.L. Greene, 1897
- Genus Deinosmos Rafinesque, 1837
- Genus Delairea Lemaire, 1844
- Genus Delamerea S.M. Moore, 1900
- Genus Delilia K.P.J. Sprengel, 1823
- Genus Deloderium Cassini in F. Cuvier, 1827
- Genus Delucia A.P. de Candolle, 1836
- Genus Delwiensia W.A. Weber & R.C. Wittmann, 2009
- Genus Demetria M. Lagasca, 1816
- Genus Demidium A.P. de Candolle, 1838 accepted as Gnaphalium Linnaeus, 1753
- Genus Dendranthema (A.P. de Candolle) Des Moulins, 1860 accepted as Chrysanthemum Linnaeus, 1753
- Genus Dendrocacalia (Nakai) Tuyama, 1936
- Genus Dendrophorbium (J. Cuatrecasas) C. Jeffrey, 1992
- Genus Dendrosenecio (L. Hauman ex O. Hedberg) B. Nordenstam, 1978
- Genus Dendroseris D. Don, 1832
- Genus Dendroviguiera E.E. Schilling & J.L. Panero, 2011
- Genus Denekia Thunberg, 1801
- Genus Denira Adanson, 1763
- Genus Densleonis Séguier, 1754 accepted as Dens-leonis Séguier, 1754
- Genus Dens-leonis Séguier, 1754
- Genus Derderia Jaubert & Spach, 1843
- Genus Derouetia Boissier & Balansa, 1856
- Genus Desmanthodium Bentham, 1872
- Genus Desmocephalum J.D. Hooker, 1847
- Genus Detridium C.G.D. Nees, 1832
- Genus Detris Adanson, 1763 accepted as Felicia Cassini, 1818
- Genus Dewildemania O. Hoffmann in E. De Wildeman, 1903
- Genus Diacantha Lessing, 1830
- Genus Diacantha Lagasca, 1811
- Genus Diacranthera R.M. King & H.E. Robinson, 1972
- Genus Dialesta Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Dianthoseris C.H. Schultz-Bipontinus, 1842 accepted as Crepis Linnaeus, 1753
- Genus Diaperia Nuttall, 1840
- Genus Diaphoranthus F.J.F. Meyen, 1834
- Genus Diaphractanthus Humbert, 1923
- Genus Diaspananthus F.A. Miquel, 1866
- Genus Diazeuxis D. Don, 1830 accepted as Lycoseris Cassini in F. Cuvier, 1824
- Genus Dibothrospermum Knaf, 1846
- Genus Dicalymma Lemaire, 1855
- Genus Dicercoclados C. Jeffrey & Y.L. Chen, 1984
- Genus Dicerothamnus M. Koekemoer, MS?
- Genus Dicerothamnus M. Koekemoer, 2019
- Genus Dichaeta Nuttall, 1841
- Genus Dichaetophora A. Gray, 1849
- Genus Dichrocephala L'Héritier ex A.P. de Candolle, 1833
- Genus Dichromochlamys C.R. Dunlop, 1980
- Genus Dicoma Cassini, 1817
- Genus Dicomopsis S. Ortiz in S. Ortiz, R. Carbajal, M. Serrano, J. Rodríguez-Oubiña & I. Iglesias, 2013
- Genus Dicoria J. Torrey & A. Gray in J. Torrey in Emory, 1859
- Genus Dicranocarpus A. Gray, 1854
- Genus Didelta L'Héritier de Brutelle, 1786
- Genus Dielitzia P.S. Short, 1989
- Genus Dieteria Nuttall, 1840
- Genus Digitacalia R.W. Pippen, 1968
- Genus Diglossus Cassini, 1817
- Genus Dilepis Suessenguth & Merxmueller, 1950
- Genus Dillandia V.A. Funk & H.E. Robinson, 2001
- Genus Dimeresia A. Gray, 1886
- Genus Dimerostemma Cassini, 1817
- Genus Dimersia accepted as Dimeresia A. Gray, 1886
- Genus Dimorphanthes Cassini, 1818 accepted as Conyza Lessing, 1832
- Genus Dimorphocoma F. von Mueller & Tate, 1883
- Genus Dimorpholepis (G.M. Barroso) R.M. King & H.E. Robinson, 1971
- Genus Dimorpholepis A. Gray, 1851
- Genus Dimorphotheca S. Vaillant, 1754
- Genus Dinoseris Grisebach, 1879
- Genus Diodonta Nuttall, 1841
- Genus Diodontium F. von Mueller, 1857
- Genus Diomedea Cassini, 1817
- Genus Dioszegia J. Heuffel, 1854
- Genus Diotis Desfontaines, 1799 accepted as Otanthus Hoffmannsegg & Link, 1809
- Genus Diotosperma A. Gray, 1851
- Genus Diotostephus Cassini in F. Cuvier, 1827
- Genus Diplactis Rafinesque, 1837
- Genus Diplazoptilon Ling, 1965
- Genus Diplemium Rafinesque, 1837
- Genus Diplocoma D. Don ex Sweet, 1828
- Genus Diplogon Rafinesque, 1819
- Genus Diplopappus Cassini, 1817 accepted as Chrysopsis (Nuttall) S. Elliott, 1823
- Genus Diplosastera Tausch, 1823
- Genus Diplostelma Rafinesque, 1837
- Genus Diplostemma Hochstetter & Steudel ex A.P. de Candolle, 1838
- Genus Diplostephium Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Diplothrix A.P. de Candolle, 1836 accepted as Zinnia Linnaeus, 1759
- Genus Dipterocome F.E.L. Fischer & C.A. Meyer, 1835
- Genus Dipterocypsela S.F. Blake, 1945
- Genus Dipterotheca C.H. Schultz-Bipontinus, 1842
- Genus Discomela Rafinesque, 1825
- Genus Discoseris (Endlicher) Post & O. Kuntze, 1903
- Genus Disparago J. Gaertner, 1791
- Genus Dissothrix A. Gray, 1851
- Genus Distasis A.P. de Candolle, 1836
- Genus Distegia Klatt, 1896
- Genus Distephanus Cassini, 1817
- Genus Distoecha R.A. Philippi, 1891 accepted as Hypochaeris Linnaeus, 1753
- Genus Distreptus Cassini, 1817 accepted as Pseudelephantopus Rohr, 1792
- Genus Disynaphia W.J. Hooker & Arnott ex A.P. de Candolle, 1838
- Genus Dithyrostegia A. Gray, 1851
- Genus Ditrichum Cassini, 1817
- Genus Dittrichia W. Greuter, 1973
- Genus Doellia C.H. Schultz-Bipontinus ex Walpers, 1843
- Genus Doellingeria C.G.D. Nees, 1832
- Genus Dolichlasium Lagasca, 1811
- Genus Dolichoglottis B. Nordenstam, 1978
- Genus Dolichogyne A.P. de Candolle, 1838
- Genus Dolichorrhiza (A.I. Pojarkova) A.I. Galucko, 1970
- Genus Dolichostylis Cassini in F. Cuvier, 1828 accepted as Fulcaldea Poiret, 1817
- Genus Dolichotheca Cassini in F. Cuvier, 1827 accepted as Campylotheca Cassini in F. Cuvier, 1827
- Genus Dolichothrix O.M. Hilliard & B.L. Burtt, 1981
- Genus Dolomiaea A.P. de Candolle, 1833
- Genus Dolosanthus Klatt, 1896 accepted as Baccharoides Moench, 1794
- Genus Donia R. Brown in W.T. Aiton, 1813
- Genus Doniana Rafinesque, 1818
- Genus Doniophyton H.A. Weddell, 1855
- Genus Dontospermum Necker ex C.H. Schultz-Bipontinus in Walpers, 1843
- Genus Doratolepis (Bentham) Schlechtendal, 1847 accepted as Leptorhynchos Lessing, 1832
- Genus Doria Thunberg, 1800 accepted as Othonna Linnaeus, 1753
- Genus Doria Fabricius, 1759
- Genus Dorobaea Cassini in F. Cuvier, 1827
- Genus Doronicum Linnaeus, 1753
- Genus Draconia Heister ex Fabricius, 1759
- Genus Dracopis (Cassini) Cassini in F. Cuvier, 1825 accepted as Rudbeckia Linnaeus, 1753
- Genus Dracopsis Cassini accepted as Dracopis (Cassini) Cassini in F. Cuvier, 1825
- Genus Drepania A.L. Jussieu, 1789
- Genus Dresslerothamnus H. Robinson, 1978
- Genus Drozia Cassini in F. Cuvier, 1825
- Genus Dubautia Gaudichaud-Beaupré in Freycinet, 1830
- Genus Dubyaea A.P. de Candolle, 1838
- Genus Duchesnia Cassini, 1817
- Genus Dugaldia Cassini in F. Cuvier, 1828 accepted as Hymenoxys Cassini in F. Cuvier, 1828
- Genus Dugesia A. Gray, 1882
- Genus Duhaldea A.P. de Candolle, 1836
- Genus Duidaea S.F. Blake, 1931
- Genus Dumantia A.P. de Candolle, 1836 accepted as Dunantia A.P. de Candolle, 1836
- Genus Dumerilia Lagasca ex A.P. de Candolle, 1812
- Genus Dumerilia Lessing, 1830
- Genus Dunantia A.P. de Candolle, 1836
- Genus Durandoa Pomel, 1860
- Genus Dusenia O. Hoffmann in P. Dusén, 1900
- Genus Duseniella K.M. Schumann, 1902
- Genus Duttonia F. von Mueller, 1853
- Genus Dymondia R.H. Compton, 1953
- Genus Dysaster H. Robinson & V. Funk, 2014
- Genus Dyscritogyne R.M. King & H.E. Robinson, 1971 accepted as Steviopsis R.M. King & H.E. Robinson, 1971
- Genus Dyscritothamnus B.L. Robinson, 1922
- Genus Dysodiopsis (A. Gray) Rydberg, 1915
- Genus Dysodium Persoon, 1807 accepted as Melampodium Linnaeus, 1753
- Genus Dyssodia Cavanilles, 1801
- Genus Dyssodia Willdenow, 1809
- Genus Eastwoodia T.S. Brandegee, 1894
- Genus Eatonella A. Gray, 1883
- Genus Echenais Cassini, 1818
- Genus Echenaïs Cassini, 1818 represented as Echenais Cassini, 1818
- Genus Echetrosis R.A. Philippi, 1873
- Genus Echinabeckia M.H.J. van der Meer, 2019
- Genus Echinacea Moench, 1794
- Genus Echinocephalum G. Gardner, 1848
- Genus Echinocoryne H.E. Robinson, 1987
- Genus Echinomeria Nuttall, 1840
- Genus Echinops Linnaeus, 1753
- Genus Echinopus P. Miller, 1754
- Genus Eclipta Linnaeus, 1771
- Genus Ecliptica O. Kuntze, 1891
- Genus Eclopes Banks ex J. Gaertner, 1791
- Genus Edemias Rafinesque, 1837
- Genus Edmondia Cassini, 1818
- Genus Edwartiothamnus A.A. Anderberg, 1991 accepted as Ewartiothamnus A.A. Anderberg, 1991
- Genus Eenia Hiern & S.M. Moore, 1899
- Genus Egania E.J. Remy in C. Gay, 1848 accepted as Chaetanthera Ruiz & Pavon, 1794
- Genus Egletes Cassini, 1817
- Genus Eirmocephala H.E. Robinson, 1987
- Genus Eitenia R.M. King & H.E. Robinson, 1974
- Genus Eizaguirrea E.J. Remy in C. Gay, 1848-1849
- Genus Ekmania Gleason, 1919
- Genus Ekmaniopappus A.L. Borhidi, 1992
- Genus Elachanthemum Y. Ling & Y.R. Ling, 1978 accepted as Artemisia Linnaeus, 1753
- Genus Elachanthus F. von Mueller, 1853 accepted as Minuria A.P. de Candolle, 1836
- Genus Elachia A.P. de Candolle, 1838
- Genus Elachopappus F. von Mueller, 1863
- Genus Elachothamnos A.P. de Candolle, 1836
- Genus Elaphandra J.L. Strother, 1991
- Genus Elcismia B.L. Robinson, 1913
- Genus Electra A.P. de Candolle, 1836 accepted as Electranthera Mesfin Tadesse, D.J. Crawford & J.F. Pruski in Pruski et al., 2015
- Genus Electranthera Mesfin Tadesse, D.J. Crawford & J.F. Pruski in Pruski et al., 2015
- Genus Elekmania B. Nordenstam, 2006
- Genus Elephantopsis (Schultz-Bipontinus) C.F. Baker, 1902
- Genus Elephantopus Linnaeus, 1753
- Genus Elephantosis Lessing, 1829
- Genus Eleutheranthera Poiteau, 1802
- Genus Elichrysum P. Miller, 1754 accepted as Helichrysum P. Miller, 1754
- Genus Ellenbergia Cuatrecasas, 1964
- Genus Elphegea Cassini, 1818
- Genus Elvira Cassini in F. Cuvier, 1824 accepted as Delilia K.P.J. Sprengel, 1823
- Genus Elytropappus Cassini, 1816
- Genus Embergeria Boulos in H. Eichler, 1965
- Genus Emilia Cassini, 1817
- Genus Emiliella S.M. Moore, 1918 accepted as Emilia Cassini, 1817
- Genus Emphysopus J.D. Hooker, 1847
- Genus Enalcida Cassini, 1819
- Genus Encelia Adanson, 1763
- Genus Enceliopsis (A. Gray) A. Nelson, 1909
- Genus Endivia J. Hill, 1756
- Genus Endocellion N. Turczaninow ex F. von Herder, 1865
- Genus Endoleuca Cassini, 1819
- Genus Endopappus C.H. Schultz Bipontinus, 1860
- Genus Endoptera A.P. de Candolle, 1838
- Genus Endorima Rafinesque, 1819
- Genus Engelmannia A. Gray ex Nuttall, 1840
- Genus Engleria O. Hoffmann, 1888
- Genus Enula Boehmer in C.G. Ludwig, 1760
- Genus Enydra Loureiro, 1790
- Genus Eoglandula G.L. Nesom, 2020 accepted as Spongotrichum C.G.D. Nees, 1832
- Genus Epallage A.P. de Candolle, 1838
- Genus Epaltes Cassini, 1818
- Genus Epatitis Rafinesque, 1837
- Genus Ephedrides G.L. Nesom, 2020
- Genus Epilasia (Bunge) Bentham & J.D. Hooker, 1873
- Genus Epilepis Bentham, 1839
- Genus Episcothamnus H.E. Robinson, 1981 accepted as Lychnophoriopsis C.H. Schultz-Bipontinus, 1863
- Genus Epitrachys (A.P. de Candolle ex Duby) C. Koch, 1851 accepted as Cirsium P. Miller, 1754
- Genus Epitriche Turczaninow, 1851
- Genus Erato A.P. de Candolle, 1836
- Genus Erechtites Rafinesque, 1817
- Genus Eremanthus Lessing, 1829
- Genus Eremiastrum A. Gray, 1854 accepted as Monoptilon J. Torrey & A. Gray, 1845
- Genus Ereminula E.L. Greene, 1892
- Genus Eremohylema A. Nelson, 1924
- Genus Eremonanus I.M. Johnston, 1923
- Genus Eremopappus A.L. Takhtajan, 1945
- Genus Eremosis (A.P. de Candolle) Gleason, 1906
- Genus Eremothamnus O. Hoffmann, 1888
- Genus Eriachaenium C.H. Schultz-Bipontinus, 1855
- Genus Ericameria Nuttall, 1840
- Genus Ericentrodea S.F. Blake & E.E. Sherff, 1923
- Genus Erigerodes O. Kuntze, 1891
- Genus Erigeron Linnaeus, 1753
- Genus Erinacella (K.H. Rechinger) J. Dostál, 1973 accepted as Myopordon Boissier, 1846
- Genus Eriocarpha Cassini in F. Cuvier, 1829
- Genus Eriocarpum Nuttall, 1840 accepted as Machaeranthera C.G.D. Nees, 1832
- Genus Eriocephalus Linnaeus, 1753
- Genus Eriochlamys Sonder & F. von Mueller, 1853
- Genus Eriocladium J. Lindley, 1839
- Genus Eriocline (Cassini) Cassini in F. Cuvier, 1819 accepted as Osteospermum Linnaeus, 1753
- Genus Eriocoma Kunth in Humboldt, Bonpland & Kunth, 1818 accepted as Montanoa Cervantes in La Llave & Lexarza, 1825
- Genus Eriolepis Cassini in F. Cuvier, 1826
- Genus Eriopappus Arnott in Lindley, 1836
- Genus Eriopha J. Hill, 1762
- Genus Eriophyllum Lagasca, 1816
- Genus Eriopus D. Don in Sweet, 1837
- Genus Eriosphaera Lessing, 1832 accepted as Galeomma S. Rauschert, 1982
- Genus Eriosphaera F.G. Dietrich, 1817
- Genus Eriostemon Lessing, 1832
- Genus Eriothrix A.H.G. de Cassini, 1817 accepted as Eriotrix Cassini, 1817
- Genus Eriotrix Cassini, 1817
- Genus Eritheis S.F. Gray, 1821
- Genus Erlangea C.H. Schultz-Bipontinus, 1853
- Genus Erodiophyllum F. von Mueller, 1875
- Genus Eroeda M.R. Levyns, 1948
- Genus Erymophyllum P.G. Wilson, 1989
- Genus Eryngiophyllum Greenman, 1903
- Genus Erythradenia (B.L. Robinson) R.M. King & H.E. Robinson, 1969
- Genus Erythremia Nuttall, 1841
- Genus Erythrocephalum Bentham in Bentham & J.D. Hooker, 1873
- Genus Erythrochaete Siebold & Zuccarini, 1846 accepted as Ligularia Cassini, 1816
- Genus Erythrolaena Sweet, 1825
- Genus Erythropogon A.P. de Candolle, 1838
- Genus Erythroseris N. Kilian & B. Gemeinholzer, 2007
- Genus Eschenbachia Moench, 1794
- Genus Esopon Rafinesque, 1817
- Genus Espejoa A.P. de Candolle, 1836
- Genus Espeletia Mutis ex Bonpland in Humboldt & Bonpland, 1808
- Genus Espeletiopsis J. Cuatrecasas, 1976
- Genus Ethulia Linnaeus f., 1762
- Genus Ethuliopsis F. von Mueller, 1861
- Genus Eucephalus Nuttall, 1840
- Genus Euchiton Cassini in F. Cuvier, 1828
- Genus Euchloris D. Don, 1826
- Genus Eudorus Cassini, 1818
- Genus Eumorphia A.P. de Candolle, 1838
- Genus Eunoxis Rafinesque, 1838
- Genus Eupatoriadelphus R.M. King & H.E. Robinson, 1970 accepted as Eutrochium Rafinesque, 1838
- Genus Eupatoriastrum Greenman, 1904
- Genus Eupatorina R.M. King & H.E. Robinson, 1971
- Genus Eupatoriophalacron P. Miller, 1754
- Genus Eupatoriopsis Hieronymus, 1893
- Genus Eupatorium Linnaeus, 1753
- Genus Euphrosinia H.G.L. Reichenbach, 1841
- Genus Euphrosyne A.P. de Candolle, 1836
- Genus Eurybia (Cassini) Cassini in F. Cuvier, 1820
- Genus Eurybiopsis A.P. de Candolle, 1836
- Genus Eurydochus Maguire & Wurdack, 1958
- Genus Euryops (Cassini) Cassini in F. Cuvier, 1820
- Genus Eutetras A. Gray, 1879
- Genus Euthamia (T. Nuttall) Cassini in F. Cuvier, 1825
- Genus Euthrixia D. Don, 1830
- Genus Eutrochium Rafinesque, 1838
- Genus Euxenia Chamisso in C.G.D. Nees, 1820
- Genus Evacidium Pomel, 1875 accepted as Filago Linnaeus, 1753
- Genus Evacopsis Pomel, 1874
- Genus Evax J. Gaertner, 1791 accepted as Filago Linnaeus, 1753
- Genus Evopis Cassini, 1818
- Genus Ewartia Beauverd, 1910
- Genus Ewartiothamnus A.A. Anderberg, 1991
- Genus Exomiocarpon Lawalrée, 1943
- Genus Exostigma G. Sancho, 2012
- Genus Eyrea F. von Mueller, 1853
- Genus Eyselia H.G.L. Reichenbach, 1830
- Genus Fabera C.H. Schultz-Bipontinus, 1845
- Genus Faberia Hemsley in F.B. Forbes & Hemsley, 1888
- Genus Faberiopsis C. Shih & Y.L. Chen, 1996
- Genus Facelis Cassini, 1819
- Genus Famatinanthus L. Ariza Espinar & S.E. Freire in S.E. Freire, G.E. Barboza, J.J. Cantero & L. Ariza Espinar, 2014
- Genus Farfugium Lindley, 1857
- Genus Farobaea Schrank ex Colla, 1828
- Genus Faujasia Cassini, 1819
- Genus Faujasiopsis C. Jeffrey, 1992
- Genus Faustula Cassini, 1818
- Genus Favonium J. Gaertner, 1791
- Genus Faxonia T.S. Brandegee, 1894
- Genus Feaea K.P.J. Sprengel, 1826
- Genus Feaella S.F. Blake, 1930
- Genus Feddea Urban, 1925
- Genus Feldstonia P.S. Short, 1989
- Genus Felicia Cassini, 1818
- Genus Femeniasia A. Susanna de la Serna, 1988 accepted as Carthamus Linnaeus, 1753
- Genus Fenixia E.D. Merrill, 1917
- Genus Ferdinanda Lagasca, 1816 accepted as Zaluzania Persoon, 1807
- Genus Ferreyanthus H.E. Robinson & R.D. Brettell, 1974
- Genus Ferreyranthus H.E. Robinson & R.D. Brettell, 1974
- Genus Ferreyrella S.F. Blake, 1958
- Genus Fichtea C.H. Schultz-Bipontinus, 1836
- Genus Fidelia C.H. Schultz-Bipontinus, 1834
- Genus Filaginella P.M. Opiz, 1854 accepted as Gnaphalium Linnaeus, 1753
- Genus Filaginopsis Torrey & A. Gray, 1842
- Genus Filago Linnaeus, 1753
- Genus Filagopsis (Battandier) Rouy in Foucaud & E.G. Camus, 1903 accepted as Filago Linnaeus, 1753
- Genus Filfia J. Holub, 1998
- Genus Filifolium Kitamura, 1940
- Genus Fimbrillaria Cassini, 1818
- Genus Fimbristima Rafinesque, 1837
- Genus Fingalia Schrank, 1823-1824
- Genus Fitchia J.D. Hooker, 1845
- Genus Fitzwillia P.S. Short, 1989
- Genus Flaveria A.L. Jussieu, 1789
- Genus Fleischeria Hochstetter & Steudel ex Boissier, 1875
- Genus Fleischmannia C.H. Schultz-Bipontinus, 1850
- Genus Fleischmanniana C.H. Schultz Bipontinus accepted as Fleischmannia C.H. Schultz-Bipontinus, 1850
- Genus Fleischmanniopsis R.M. King & H.E. Robinson, 1971
- Genus Fleurotia H.G.L. Reichenbach, 1841
- Genus Florestina Cassini, 1817
- Genus Floscaldasia Cuatrecasas, 1968
- Genus Flosmutisia J. Cuatrecasas, 1986
- Genus Flotovia K.P.J. Sprengel, 1826 accepted as Dasyphyllum Kunth in Humboldt, Bonpland & Kunth, 1828
- Genus Flourensia A.P. de Candolle, 1836
- Genus Fluminaria N.G. Bergh in Bentley et al., 2017
- Genus Flustula Rafinesque, 1838
- Genus Flyriella R.M. King & H.E. Robinson, 1972
- Genus Fontquera Maire, 1931 accepted as Perralderia Cosson, 1859
- Genus Forbicina Séguier, 1754
- Genus Formania W.W. Smith & J.K. Small, 1922
- Genus Forneum Adanson, 1763
- Genus Fornicaria Rafinesque, 1838
- Genus Fornicium Cassini, 1819
- Genus Fougeria Moench, 1802
- Genus Fougerouxia Cassini in F. Cuvier, 1827
- Genus Foveolina M. Källersjö, 1988
- Genus Fradinia Pomel, 1874
- Genus Fragmosa Rafinesque, 1837
- Genus Francoeuria Cassini in F. Cuvier, 1825 accepted as Pulicaria J. Gaertner, 1791
- Genus Franseria Cavanilles, 1793 accepted as Ambrosia Linnaeus, 1753
- Genus Frappieria E. Jacob de Cordemoy, 1871
- Genus Fresenia A.P. de Candolle, 1836
- Genus Freya V.M. Badillo, 1985
- Genus Frivaldia Endlicher, 1837
- Genus Frolovia (A.P. de Candolle) Lipschitz, 1954
- Genus Fulcaldea Poiret, 1817
- Genus Fullartonia A.P. de Candolle, 1836
- Genus Gaertneria Medikus, 1789 accepted as Ambrosia Linnaeus, 1753
- Genus Gaillarda Fougeroux, 1786 accepted as Gaillardia Fougeroux, 1786
- Genus Gaillardia Fougeroux, 1786
- Genus Galactites Moench, 1794
- Genus Galatea Cassini ex Lessing, 1832
- Genus Galatella Cassini in F. Cuvier, 1825 accepted as Aster Linnaeus, 1753
- Genus Galathenium Nuttall, 1841
- Genus Galeana La Llave in La Llave & Lexarza, 1824
- Genus Galeomma S. Rauschert, 1982
- Genus Galgera A.A. Anderberg & A. Bengtson, 2022
- Genus Galinsoga Ruiz & Pavon, 1794
- Genus Galinsogea Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Galinsogeopsis C.H. Schultz-Bipontinus in B.C. Seemann, 1856
- Genus Galinsogia Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Galophthalmum C.G.D. Nees & C.F.P. Martius, 1824
- Genus Gama La Llave, 1884
- Genus Gamochaeta Weddell, 1856
- Genus Gamochaetopsis A.A. Anderberg & S.E. Freire, 1991
- Genus Gamolepis Lessing, 1832 accepted as Steirodiscus Lessing, 1832
- Genus Gamozygis Turczaninow, 1851
- Genus Garberia A. Gray, 1880
- Genus Garcibarrigoa J. Cuatrecasas, 1986
- Genus Garcilassa Poeppig in Poeppig & Endlicher, 1843 accepted as Hymenostephium Bentham in Bentham & J.D. Hooker, 1873
- Genus Gardnerina R.M. King & H.E. Robinson, 1981
- Genus Garhadiolus Jaubert & Spach, 1850
- Genus Garuleum Cassini, 1819
- Genus Gastrocarpha D. Don in Sweet, 1827
- Genus Gastrostylum C.H. Schultz-Bipontinus, 1844 accepted as Gastrosulum C.H. Schultz-Bipontinus, 1844
- Genus Gastrosulum C.H. Schultz-Bipontinus, 1844
- Genus Gatyona Cassini, 1818
- Genus Gazania J. Gaertner, 1791
- Genus Gazaniopsis C. Huber, 1880
- Genus Geblera M. Kitagawa, 1937 accepted as Crepidiastrum Nakai, 1920
- Genus Geigeria Griesselich, 1830
- Genus Geissolepis B.L. Robinson, 1892
- Genus Geissopappus Bentham, 1840 accepted as Calea Linnaeus, 1763
- Genus Gelasia Cassini, 1818
- Genus Gemella J. Hill, 1761
- Genus Georgina Willdenow, 1803 accepted as Dahlia Cavanilles, 1791
- Genus Geothamnus G.L. Nesom, 2020
- Genus Geracium H.G.L. Reichenbach, 1832
- Genus Geraea J. Torrey & A. Gray, 1847
- Genus Gerbera Boehmer, 1760
- Genus Gerbera Linnaeus, 1758
- Genus Geropogon Linnaeus, 1763
- Genus Gibbaria Cassini, 1817
- Genus Giflifa J. Chrtek & J. Holub, 1963
- Genus Gifola Cassini, 1819 accepted as Filago Linnaeus, 1753
- Genus Gifolaria Cosson ex Pomel, 1888
- Genus Gilberta Turczaninow, 1851
- Genus Gilruthia Ewart, 1909
- Genus Giraldia E. Baroni, 1897
- Genus Gladiopappus Humbert, 1948
- Genus Glaziovianthus G.M. Barroso, 1947 accepted as Chresta Vellozo ex A.P. de Candolle, 1836
- Genus Glebianthemum J.M. Watson & A.R. Flores in Flores et al., 2018
- Genus Glebionis Cassini in F. Cuvier, 1826
- Genus Glossanthis P.P. Poljakov, 1959 accepted as Pseudoglossanthis Poljakov, 1967
- Genus Glossarion Maguire & Wurdack, 1957
- Genus Glossocardia Cassini, 1817
- Genus Glossogyne Cassini in F. Cuvier, 1827 accepted as Glossocardia Cassini, 1817
- Genus Glossopappus G. Kunze, 1846
- Genus Glycideras A.P. de Candolle, 1838 accepted as Psiadia N.J. Jacquin ex Willdenow, 1803
- Genus Glycyderas Cassini in F. Cuvier, 1829 accepted as Psiadia N.J. Jacquin ex Willdenow, 1803
- Genus Glyphia Cassini, 1818 accepted as Psiadia N.J. Jacquin ex Willdenow, 1803
- Genus Glyptopleura D.C. Eaton in S. Watson, 1871
- Genus Gnaphalion Adanson, 1763
- Genus Gnaphaliothamnus M.E. Kirpicznikov in M.E. Kirpicznikov & L.A. Kuprijanova, 1950
- Genus Gnaphalium Linnaeus, 1753
- Genus Gnaphalium Adanson, 1763
- Genus Gnaphalodes A. Gray, 1852
- Genus Gnaphalodes P. Miller, 1754 accepted as Actinobole Endlicher, 1843
- Genus Gnaphalon R.T. Lowe, 1868
- Genus Gnaphalopsis A.P. de Candolle, 1838
- Genus Gnephosis Cassini, 1820
- Genus Gnomophalium W.R. Greuter, 2003
- Genus Gochnatia Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Goekyighitia Ş. Yıldırımlı, 2020 accepted as Gelasia Cassini, 1818
- Genus Goldmanella Greenman, 1908
- Genus Goldmania Greenman, 1907
- Genus Golionema S. Watson, 1891
- Genus Gomesia La Llave, 1838
- Genus Gomezia G. Bentham & J.D. Hooker, 1873 accepted as Gomesia La Llave, 1838
- Genus Gongrostylus R.M. King & H.E. Robinson, 1972
- Genus Gongrothamnus Steetz in Peters, 1864 accepted as Distephanus Cassini, 1817
- Genus Gongylolepis R. Schomburgk, 1847
- Genus Goniocaulon Cassini, 1817
- Genus Goniopogon Turczaninow, 1851
- Genus Gonospermum Lessing, 1832
- Genus Gonotheca Rafinesque, 1818
- Genus Gonzalezia E.E. Schilling & J.L. Panero, 2011
- Genus Gorceixia J.G. Baker, 1882
- Genus Gorteria Linnaeus, 1759
- Genus Gossweilera S.M. Moore, 1908
- Genus Goyazianthus R.M. King & H.E. Robinson, 1977
- Genus Graciela J. Rzedowski, 1975 accepted as Strotheria B.L. Turner, 1972
- Genus Graemia W.J. Hooker, 1825
- Genus Grammarthron Cassini, 1817
- Genus Grangea Adanson, 1763
- Genus Grangeopsis Humbert, 1923
- Genus Grantia Boissier, 1846 accepted as Iphiona Cassini, 1817
- Genus Graphistylis B. Nordenstam, 1978
- Genus Gratwickia F. von Mueller, 1895
- Genus Grauanthus A. Fayed, 1979
- Genus Grazielia R.M. King & H.E. Robinson, 1972
- Genus Greenella A. Gray, 1880 accepted as Gutierrezia Lagasca, 1816
- Genus Greenmania Hieronymus, 1901
- Genus Greenmaniella W.M. Sharp, 1935
- Genus Griersonia G.L. Nesom, 2020
- Genus Griffithia J.M. Black, 1913
- Genus Grindelia Willdenow, 1807
- Genus Grisebachianthus R.M. King & H.E. Robinson, 1975
- Genus Grossheimia D.I. Sosnovsky & A.L. Takhtajan, 1945
- Genus Grosvenoria R.M. King & H. Robinson, 1975
- Genus Grypocarpha Greenman in Sargent, 1903
- Genus Guaicaia Maguire in Maguire et al., 1967 accepted as Glossarion Maguire & Wurdack, 1957
- Genus Guardiola Cervantes ex Bonpland in Humboldt & Bonpland, 1807
- Genus Guariruma Cassini in F. Cuvier, 1824
- Genus Guayania R.M. King & H.E. Robinson, 1971
- Genus Guenthera E. Regel, 1857
- Genus Guentheria K.P.J. Sprengel, 1826 accepted as Gaillardia Fougeroux, 1786
- Genus Guerreroia E.D. Merrill, 1917 accepted as Glossocardia Cassini, 1817
- Genus Guevaria R.M. King & H. Robinson, 1974
- Genus Guizotia Cassini in F. Cuvier, 1829
- Genus Gundelia Linnaeus, 1753
- Genus Gundelsheimera Cassini in F. Cuvier, 1828
- Genus Gundlachia A. Gray, 1880
- Genus Guneria Ş. Yıldırımlı, 2021 accepted as Gelasia Cassini, 1818
- Genus Gusmania E.J. Remy in C. Gay, 1849
- Genus Gutenbergia C.H. Schultz-Bipontinus, 1840
- Genus Gutierrezia Lagasca, 1816
- Genus Guynesomia J.M. Bonifacino & G. Sancho, 2004
- Genus Gymnanthemum Cassini, 1817
- Genus Gymnarrhena Desfontaines, 1818
- Genus Gymnaster Kitamura, 1937
- Genus Gymnocline Cassini, 1816 accepted as Tanacetum Linnaeus, 1753
- Genus Gymnocondylus R.M. King & H.E. Robinson, 1972
- Genus Gymnocoronis A.P. de Candolle, 1836
- Genus Gymnodiscus Lessing, 1831
- Genus Gymnogyne Steetz in J.G.C. Lehmann, 1845
- Genus Gymnolaena (A.P. de Candolle) Rydberg, 1915
- Genus Gymnoloma Ker-Gawler, 1822 accepted as Gymnolomia Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Gymnolomia Kunth in Humboldt, Bonpland & Kunth, 1818 accepted as Wedelia N.J. Jacquin, 1760
- Genus Gymnopentzia Bentham in Bentham & J.D. Hooker, 1873
- Genus Gymnopsis A.P. de Candolle, 1836 accepted as Aspilia L.M.A.A. Du Petit-Thouars, 1806
- Genus Gymnosperma Lessing, 1832
- Genus Gymnostephium Lessing, 1832
- Genus Gymnostyles A.L. Jussieu, 1804 accepted as Soliva Ruiz & Pavon, 1794
- Genus Gynactis Cassini in F. Cuvier, 1827
- Genus Gynaphanes Steetz in Peters, 1864
- Genus Gynema Rafinesque, 1817
- Genus Gynheteria Willdenow, 1807
- Genus Gynoxys Cassini in F. Cuvier, 1827
- Genus Gynura Cassini in F. Cuvier, 1825
- Genus Gypothamnium Philippi, 1860
- Genus Gyptidium R.M. King & H.E. Robinson, 1972
- Genus Gyptis (Cassini) Cassini in F. Cuvier, 1820
- Genus Gyrodoma H. Wild, 1974
- Genus Gyrophyllum (T. Nuttall) Mesfin Tadesse & D.J. Crawford, 2023 accepted as Anacis Schrank, 1817
- Genus Gyrostephium Turczaninow, 1851
- Genus Haarera J. Hutchinson & Bruce, 1932 accepted as Erlangea C.H. Schultz-Bipontinus, 1853
- Genus Haastia J.D. Hooker, 1864
- Genus Hacub Boehmer in C.G. Ludwig, 1760
- Genus Haeckeria F. von Mueller, 1853
- Genus Haegiela P.S. Short & P.G. Wilson, 1990
- Genus Haemastegia Klatt, 1892
- Genus Haenelia Walpers, 1843
- Genus Haenselera Boissier ex A.P. de Candolle, 1838
- Genus Hagioseris Boissier, 1849
- Genus Hainanecio Y. Liu & Q.-E. Yang, 2011
- Genus Halea J. Torrey & A. Gray, 1842 accepted as Tetragonotheca Linnaeus, 1753
- Genus Hamulium Cassini, 1820
- Genus Handelia Heimerl, 1922
- Genus Hapalostephium D. Don, 1825
- Genus Haplocalymma S.F. Blake, 1916 accepted as Viguiera Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Haplocarpha Lessing, 1831
- Genus Haplodiscus (Bentham) R.A. Philippi, 1895 accepted as Haplopappus Cassini in F. Cuvier, 1828
- Genus Haploesthes A. Gray, 1849
- Genus Haploësthes A. Gray, 1849 represented as Haploesthes A. Gray, 1849
- Genus Haplopappus Cassini in F. Cuvier, 1828
- Genus Haplostephium C.F.P. Martius ex A.P. de Candolle, 1836 accepted as Lychnophora C.F.P. Martius, 1822
- Genus Haplosticha Philippi, 1859-60
- Genus Haptotrichion P.G. Wilson, 1992
- Genus Haradjania K.H. Rechinger, 1950 accepted as Myopordon Boissier, 1846
- Genus Harleya S.F. Blake, 1932
- Genus Harmona B.G. Baldwin accepted as Madia Molina, 1782
- Genus Harmonia B.G. Baldwin, 1999 accepted as Madia Molina, 1782
- Genus Harnackia Urban, 1925
- Genus Haroldia J.M. Bonifacino, 2009
- Genus Harpachaena A. Bunge, 1847
- Genus Harpaecarpus Nuttall, 1841
- Genus Harpalium (Cassini) Cassini in F. Cuvier, 1825 accepted as Helianthus Linnaeus, 1753
- Genus Harpalyce D. Don, 1829
- Genus Harpephora Endlicher, 1841
- Genus Harpocarpus Endlicher, 1843
- Genus Harthamnus H.E. Robinson, 1980 accepted as Plazia Ruiz & Pavon, 1794
- Genus Hartmannia A.P. de Candolle, 1836
- Genus Hartwrightia A. Gray ex S. Watson, 1888
- Genus Hasteola Rafinesque, 1838 accepted as Senecio Linnaeus, 1753
- Genus Hatschbachiella R.M. King & H.E. Robinson, 1972
- Genus Havanella Post & O. Kuntze, 1903
- Genus Haxtonia Caley ex G. Don, 1831
- Genus Haynea Willdenow, 1803
- Genus Hazardia E.L. Greene, 1887
- Genus Hebeclinium A.P. de Candolle, 1836
- Genus Hecastocleis A. Gray, 1882
- Genus Hecatactis F.V. Mueller ex Mattfeld in Lauterbach, 1929
- Genus Hectorea A.P. de Candolle, 1836
- Genus Hecubaea A.P. de Candolle, 1836
- Genus Hedosyne J.L. Strother, 2001
- Genus Hedypnois P. Miller, 1754
- Genus Hedypnois Scopoli, 1772
- Genus Heiraciastrum Heister ex Fabricius, 1759
- Genus Heiseria E.E. Schilling & J.L. Panero, 2011
- Genus Heleastrum A.P. de Candolle, 1836
- Genus Helenia P. Miller, 1754 accepted as Helenium Linnaeus, 1753
- Genus Heleniastrum Fabricius, 1763 accepted as Helenium Linnaeus, 1753
- Genus Helenium Linnaeus, 1753
- Genus Helenium P. Miller, 1754
- Genus Helepta Rafinesque, 1825
- Genus Helianthella J. Torrey & A. Gray, 1842
- Genus Helianthopsis H.E. Robinson, 1979 accepted as Pappobolus S.F. Blake, 1916
- Genus Helianthus Linnaeus, 1753
- Genus Helichroa Rafinesque, 1825
- Genus Helichrysopsis M.E. Kirpicznikov in M.E. Kirpicznikov & L.A. Kuprijanova, 1950
- Genus Helichrysum P. Miller, 1754
- Genus Helicta Cassini, 1818
- Genus Heliocauta C.J. Humphries, 1977
- Genus Heliogenes Bentham, 1840
- Genus Heliomeris Nuttall, 1848
- Genus Heliophthalmum Rafinesque, 1817
- Genus Heliopsis Persoon, 1807
- Genus Helioreos Rafinesque, 1832
- Genus Helipterum A.P. de Candolle, 1838 accepted as Syncarpha A.P. de Candolle, 1810
- Genus Helipterum A.P. de Candolle ex Lindley, 1836 accepted as Syncarpha A.P. de Candolle, 1810
- Genus Helminthia A.L. Jussieu, 1789 accepted as Picris Linnaeus, 1753
- Genus Helminthotheca Zinn, 1757 accepted as Picris Linnaeus, 1753
- Genus Helmintia A.L. Jussieu, 1789
- Genus Helodeaster G.L. Nesom, 2020
- Genus Helogyne Nuttall, 1841
- Genus Helogyne Bentham, 1844
- Genus Hemiachyris A.P. de Candolle, 1836
- Genus Hemiambrosia Delpino, 1871
- Genus Hemibaccharis S.F. Blake, 1924
- Genus Hemipappus K.H.E. Koch, 1851
- Genus Hemiptilium A. Gray in Torrey, 1859
- Genus Hemistepta Bunge, 1833 accepted as Hemisteptia Bunge ex F.E.L. Fischer & C.A. Meyer, 1836
- Genus Hemisteptia Bunge ex F.E.L. Fischer & C.A. Meyer, 1836
- Genus Hemixanthidium Delpino, 1871
- Genus Hemizonella (A. Gray) A. Gray, 1874
- Genus Hemizonia A.P. de Candolle, 1836
- Genus Henanthus Lessing, 1832
- Genus Henricia Cassini, 1817 accepted as Psiadia N.J. Jacquin ex Willdenow, 1803
- Genus Henricksonia B.L. Turner, 1977
- Genus Heptanthus Grisebach, 1866
- Genus Heracantha Hoffmannsegg & Link, 1820-1828
- Genus Heraclea J. Hill, 1762
- Genus Herbichia Zawadsky ex Guillemin, 1833
- Genus Herderia Cassini, 1829
- Genus Herodotia Urban & E.L. Ekman, 1926
- Genus Herreranthus B. Nordenstam, 2006
- Genus Herrickia Wooton & Standley, 1913
- Genus Hersilea Klotzsch in Klotzsch & Garcke, 1862
- Genus Hertia C.F. Lessing, 1832
- Genus Hesperevax (A. Gray) A. Gray, 1868
- Genus Hesperodoria E.L. Greene, 1906
- Genus Hesperomannia A. Gray, 1865
- Genus Hesperoseris C. Skottsberg, 1951 accepted as Dendroseris D. Don, 1832
- Genus Heterachaena Fresenius, 1839
- Genus Heteracia F.E.L. Fischer & C.A. Meyer, 1835
- Genus Heteractis A.P. de Candolle, 1838
- Genus Heteranthemis H.W. Schott, 1818
- Genus Heterochaeta A.P. de Candolle, 1836 accepted as Aster Linnaeus, 1753
- Genus Heterocoma A.P. de Candolle, 1810
- Genus Heterocondylus R.M. King & H.E. Robinson, 1972
- Genus Heterocypsela H.E. Robinson, 1979
- Genus Heteroderis (Bunge) Boissier, 1875
- Genus Heterokalimeris Kitamura, 1939
- Genus Heterolepis Cassini, 1820
- Genus Heterolophus Cassini in F. Cuvier, 1827
- Genus Heteromera Pomel, 1874
- Genus Heteromma Bentham in Bentham & J.D. Hooker, 1873
- Genus Heteromorpha Cassini, 1817
- Genus Heteropappus Lessing, 1832
- Genus Heteropleura C.H. Schultz-Bipontinus, 1862
- Genus Heteroplexis Chang, 1937
- Genus Heterorhachis C.H. Schultz-Bipontinus ex Walpers, 1846
- Genus Heterosperma Cavanilles, 1796
- Genus Heterothalamulopsis L.P. Deble, A.S. de Oliveira & J.N.C. Marchiori, 2004
- Genus Heterothalamus Lessing in D.F.L. Schlechtendal & Chamisso, 1830
- Genus Heterotheca Cassini, 1817
- Genus Heterotrichum Marschall von Bieberstein, 1819-1820
- Genus Hexinia H.L. Yang, 1992
- Genus Heyfeldera C.H. Schultz-Bipontinus, 1853
- Genus Heywoodiella E.R. Sventenius & D. Bramwell, 1971 accepted as Hypochaeris Linnaeus, 1753
- Genus Hidalgoa Lessing ex A.P. de Candolle, 1836
- Genus Hidalgoa La Llave in La Llave & Lexarza, 1824
- Genus Hieraciastrum Heister ex Fabricius, 1759
- Genus Hieraciodes O. Kuntze, 1891
- Genus Hieracioides Moench, 1794
- Genus Hieracioides Fabricius, 1759
- Genus Hieracites Saporta in Heer, 1861 †
- Genus Hieracium Linnaeus, 1753
- Genus Hierapicra O. Kuntze, 1891
- Genus Hilliardia B. Nordenstam, 1987
- Genus Hilliardiella H.E. Robinson, 1999
- Genus Himalaiella E. von Raab-Straube, 2003 accepted as Jurinea Cassini, 1821
- Genus Hingtsha Roxburgh, 1832
- Genus Hinterhubera C.H. Schultz-Bipontinus ex Weddell, 1857
- Genus Hippia Linnaeus, 1771
- Genus Hippolytia P.P. Poljakov, 1957
- Genus Hippophaestum S.F. Gray, 1821
- Genus Hipposeris Cassini in F. Cuvier, 1824
- Genus Hirnellia Cassini, 1820
- Genus Hirpicium Cassini, 1820
- Genus Hirschia J.G. Baker, 1896 accepted as Iphiona Cassini, 1817
- Genus Hirtellina (Cassini) Cassini in F. Cuvier, 1827 accepted as Staehelina Linnaeus, 1753
- Genus Hispidella Barnadez ex Lamarck, 1789
- Genus Hisutsua A.P. de Candolle, 1838
- Genus Hochstetteria A.P. de Candolle, 1838
- Genus Hoehnelia G. Schweinfurth in L. von Höhnel, 1892 accepted as Ethulia Linnaeus f., 1762
- Genus Hoehnephytum Cabrera, 1950
- Genus Hoffmannanthus H. Robinson, S.C. Keeley & J.J. Skvarla in H. Robinson, S.C. Keeley, J.J. Skvarla & R. Chan, 2014
- Genus Hoffmanniella R. Schlechter ex A. Lawalrée, 1943
- Genus Hofmeisteria Walpers, 1846
- Genus Hohenwartha Vest, 1820
- Genus Holocarpha E.L. Greene, 1897
- Species Holocarpha heermannii (Greene) Keck
- Species Holocarpha macradenia (DC.) Greene
- Species Holocarpha obconica (J.C. Clausen & Keck) Keck
- Species Holocarpha virgata (Gray) Keck
- Genus Holocheilus Cassini, 1818
- Genus Hologymne Bartling, 1838
- Genus Hololeion Kitamura, 1941
- Genus Hololepis A.P. de Candolle, 1810
- Genus Holophyllum Lessing, 1832
- Genus Holoschkuhria H. Robinson, 2002
- Genus Holozonia E.L. Greene, 1882
- Genus Homanthis Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Homochaete Bentham, 1872
- Genus Homochroma A.P. de Candolle, 1836
- Genus Homognaphalium M.E. Kirpicznikov in M.E. Kirpicznikov & L.A. Kuprijanova, 1950
- Genus Homogyne Cassini, 1816
- Genus Homoianthus Bonpland ex A.P. de Candolle, 1812
- Genus Homopappus Nuttall, 1840 accepted as Haplopappus Cassini in F. Cuvier, 1828
- Genus Homostylium C.G.D. Nees, 1845 accepted as Microglossa A.P. de Candolle, 1836
- Genus Hoorebekia Cornelissen in Mussche, 1817
- Genus Hopkirkia A.P. de Candolle, 1836
- Genus Hopkirkia K.P.J. Sprengel, 1818
- Genus Hoplophyllum A.P. de Candolle, 1836
- Genus Hoppea H.G.L. Reichenbach, 1824
- Genus Hostia Moench, 1802
- Genus Huarpea Cabrera, 1951
- Genus Huberopappus J.F. Pruski, 1992
- Genus Hubertia Bory de St.-Vincent, 1804
- Genus Huenefeldia Walpers, 1840
- Genus Hughesia R.M. King & H. Robinson, 1980
- Genus Hullsia P.S. Short, 2004
- Genus Hulsea J. Torrey & A. Gray, 1858
- Genus Hulteniella N.N. Tzvelev in B.A. Jurtzev, 1987
- Genus Humbertacalia C. Jeffrey, 1992
- Genus Humea J.E. Smith, 1804 accepted as Calomeria Ventenat, 1804
- Genus Humeocline A.A. Anderberg, 1991
- Genus Hurnefeldia Walpers, 1840 accepted as Huenefeldia Walpers, 1840
- Genus Hutchinsonia M.E. Jones, 1935
- Genus Hyalea Jaubert & Spach, 1847
- Genus Hyalis D. Don ex W.J. Hooker & Arnott in W.J. Hooker, 1835
- Genus Hyalochaete M. Dittrich & K.H. Rechinger in M. Dittrich et al., 1979 accepted as Jurinea Cassini, 1821
- Genus Hyalochlamys A. Gray, 1851
- Genus Hyalolepis A.P. de Candolle, 1838
- Genus Hyaloseris Grisebach, 1879
- Genus Hyalosperma Steetz in J.G.C. Lehmann, 1845
- Genus Hybridella Cassini, 1817
- Genus Hydrodyssodia B.L. Turner, 1988 accepted as Hydropectis Rydberg, 1914
- Genus Hydroidea P.O. Karis, 1990
- Genus Hydropectis Rydberg, 1914
- Genus Hylethale Link, 1829
- Genus Hymenatherum Cassini, 1817 accepted as Thymophylla Lagasca, 1816
- Genus Hymenocentron Cassini in F. Cuvier, 1826
- Genus Hymenocephalus Jaubert & Spach, 1847
- Genus Hymenoclea Torrey & A. Gray in Torrey, 1848 accepted as Ambrosia Linnaeus, 1753
- Genus Hymenolepis Cassini, 1817
- Genus Hymenonema Cassini, 1817
- Genus Hymenopappus L'Héritier de Brutelle, 1788
- Genus Hymenopholis G. Gardner, 1848
- Genus Hymenostemma Kunze ex Willkomm, 1864
- Genus Hymenostephium Bentham in Bentham & J.D. Hooker, 1873
- Genus Hymenothrix A. Gray, 1849
- Genus Hymenoxys Cassini in F. Cuvier, 1828
- Genus Hyoseris Linnaeus, 1753
- Genus Hyoserites Ettingshausen, 1868 †
- Genus Hypacanthium S.V. Juzepczuk, 1937
- Genus Hypelichrysum M.E. Kirpicznikov in M.E. Kirpicznikov & L.A. Kuprijanova, 1950 accepted as Pseudognaphalium M.E. Kirpicznikov in M.E. Kirpicznikov & L.A. Kuprijanova, 1950
- Genus Hypericophyllum Steetz in W.C.H. Peters, 1864
- Genus Hypochaeris Linnaeus, 1753
- Genus Hypochoeris Linnaeus, 1754 accepted as Hypochaeris Linnaeus, 1753
- Genus Hypserion G.L. Nesom, 2024
- Genus Hysterionica Willdenow, 1807
- Genus Hysterophorus Adanson, 1763
- Genus Hystrichophora Mattfeld, 1936
- Genus Ianthopappus N. Roque & D.J.N. Hind, 2001
- Genus Ichthyothere C.F.P. Martius, 1830
- Genus Icma R.A. Philippi, 1872
- Genus Ictinus Cassini, 1818
- Genus Idianthes Desvaux, 1827
- Genus Idiopappus H.E. Robinson & J.L. Panero, 1994
- Genus Idiothamnus R.M. King & H.E. Robinson, 1975
- Genus Ifloga Cassini, 1819
- Genus Ighermia A. Wiklund, 1983 accepted as Asteriscus P. Miller, 1754
- Genus Ignurbia R.B. Nordenstam, 2006
- Genus Iltisia S.F. Blake, 1958 accepted as Microspermum Lagasca, 1816
- Genus Imeria R.M. King & H.E. Robinson, 1975
- Genus Impia Bluff & Fingerhuth, 1825
- Genus Indocypraea A.E. Orchard, 2013
- Genus Inezia E.P. Phillips, 1932
- Genus Infantea Rémy in C. Gay, 1849
- Genus Ingenhusia Vellozo, 1829
- Genus Inkaliabum D.G. Gutiérrez, 2010
- Genus Intybellia Cassini, 1821
- Genus Intybellia A. Monnier, 1829
- Genus Intybus E.M. Fries, 1828
- Genus Intybus Zinn, 1757
- Genus Inula Linnaeus, 1753
- Genus Inulanthera M. Källersjö, 1986
- Genus Inulaster C.H. Schultz-Bipontinus ex A. Richard, 1848
- Genus Inuloides B. Nordenstam, 2006
- Genus Inulopsis (A.P. de Candolle) O. Hoffmann in Engler & Prantl, 1890
- Genus Inyonia M.E. Jones, 1898 accepted as Psathyrotes A. Gray, 1853
- Genus Io B. Nordenstam, 2003
- Genus Iocenes B. Nordenstam, 1978 accepted as Senecio Linnaeus, 1753
- Genus Iodocephalis Thorel ex Gagnepain, 1920 accepted as Iodocephalus Thorel ex Gagnepain, 1920
- Genus Iodocephalopsis S. Bunwong & H.E. Robinson, 2009
- Genus Iodocephalus Thorel ex Gagnepain, 1920
- Genus Iogeton J.L. Strother, 1991
- Genus Ionactis E.L. Greene, 1897
- Genus Iostephane Bentham in Bentham & J.D. Hooker, 1873
- Genus Iotasperma G.L. Nesom, 1994
- Genus Iphiona Cassini, 1817
- Genus Iphionopsis A.A. Anderberg, 1985
- Genus Iranecio B. Nordenstam, 1989
- Genus Iranoaster S. Kazempour-Osaloo, T. Farhani & V. Mozaffarian in Farhani et al., 2018
- Genus Irwinia G.M. Barroso, 1980
- Genus Ischnea F. von Mueller, 1889
- Genus Ismaria Rafinesque, 1838
- Genus Ismelia Cassini in F. Cuvier, 1826 accepted as Glebionis Cassini in F. Cuvier, 1826
- Genus Isocarpha R. Brown, 1817
- Genus Isocarpha Lessing, 1830
- Genus Isocoma Nuttall, 1840
- Genus Isoetopsis Turczaninow, 1851 accepted as Minuria A.P. de Candolle, 1836
- Genus Isoëtopsis Turczaninow, 1851 represented as Isoetopsis Turczaninow, 1851
- Genus Isonema Cassini, 1817
- Genus Isopappus J. Torrey & A. Gray, 1842 accepted as Croptilon Rafinesque, 1837
- Genus Isostigma Lessing, 1831
- Genus Isotypus Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Iteroloba G.L. Nesom, 2020
- Genus Iungia Linnaeus f., 1782
- Genus Iva Linnaeus, 1753
- Genus Ixauchenus Cassini in F. Cuvier, 1828
- Genus Ixeridium (A. Gray) N.N. Tzvelev in E.G. Bobrov & N.N. Tzvelev, 1964
- Genus Ixeris (Cassini) Cassini in F. Cuvier, 1822
- Genus Ixiauchenus Lessing, 1832
- Genus Ixine J. Hill, 1762
- Genus Ixiochlamys F. von Mueller & Sonder, 1853
- Genus Ixiolaena Bentham in Endlicher et al., 1837
- Genus Ixodia R. Brown ex W.T. Aiton, 1812
- Genus Ixyoungia Kitamura, 1942
- Genus Jacea P. Miller, 1754
- Genus Jacea Haller, 1768
- Genus Jaceacosta S. Rauschert, 1973
- Genus Jaceitrapa S. Rauschert, 1973
- Genus Jacmaia B. Nordenstam, 1978
- Genus Jacobaea J. Burman ex O. Kuntze, 1891
- Genus Jacobaea P. Miller, 1754
- Genus Jacobanthus Fourreau, 1868
- Genus Jaconecio P.V. Heath, 1999
- Genus Jacoraria P.V. Heath, 1999
- Genus Jacquemontia Bélanger, 1834
- Genus Jaegeria Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Jalambica Rafinesque, 1838
- Genus Jalantzia N. Hind in Hind & Langhorne, 2024
- Genus Jalcophila M.O. Dillon & A. Sagástegui Alva, 1986
- Genus Jaliscoa S. Watson, 1890
- Genus Jamesia C.G.D. Nees in Wied-Neuwied, 1840
- Genus Jamesianthus S.F. Blake & E.E. Sherff, 1940
- Genus Japonicalia C. Ren & Q.-E. Yang in Ren et al., 2017
- Genus Jaramilloa R.M. King & H.E. Robinson, 1980
- Genus Jasonia (Cassini) Cassini in F. Cuvier, 1825
- Genus Jaubertia Spach ex Jaubert & Spach, 1850 accepted as Dipterocome F.E.L. Fischer & C.A. Meyer, 1835
- Genus Jaumea Persoon, 1807
- Genus Jefea J.L. Strother, 1991
- Genus Jeffreya A.L. Cabrera, 1978
- Genus Jeffreya H. Wild, 1974
- Genus Jeffreycia H. Robinson, S.C. Keeley & J.J. Skvarla in H. Robinson, S.C. Keeley, J.J. Skvarla & R. Chan, 2014
- Genus Jensia B.G. Baldwin, 1999
- Genus Jessea H. Robinson & J. Cuatrecasas, 1994
- Genus Jobaphes Philippi, 1860
- Genus Johannia Willdenow, 1803 accepted as Chuquiraga A.L. Jussieu, 1789
- Genus Joseanthus H.E. Robinson, 1989
- Genus Jungia Linnaeus f., 1782
- Genus Jurinea Cassini, 1821
- Genus Jurinella Jaubert & Spach, 1846 accepted as Jurinea Cassini, 1821
- Genus Kahiria Forsskål, 1775
- Genus Kalbfussia C.H. Schultz-Bipontinus, 1833
- Genus Kalimares Rafinesque, 1837
- Genus Kalimeris H. Cassini in F. Cuvier, 1822
- Genus Kallias (Cassini) Cassini in F. Cuvier, 1825 accepted as Heliopsis Persoon, 1807
- Genus Kandemiria Ş. Yıldırımlı in Yıldırımlı & Doğru Koca, 2022
- Genus Kanimia G. Gardner, 1847 accepted as Mikania Willdenow, 1803
- Genus Karelinia Lessing, 1834
- Genus Kargilla Adanson, 1763
- Genus Karvandarina K.H. Rechinger, 1950
- Genus Kaschgaria P.P. Poljakov, 1957
- Genus Kastnera C.H. Schultz-Bipontinus, 1853
- Genus Katinasia J.M. Bonifacino, 2009
- Genus Kaulfussia C.G.D. Nees, 1820
- Genus Kaunia R.M. King & H. Robinson, 1980
- Genus Kazbegia T. Uysal & E. Hamzaoğlu in Bozkurt et al., 2024
- Genus Keerlia A.P. de Candolle, 1836
- Genus Kegelia C.H. Schultz-Bipontinus, 1848
- Genus Kemulariella S.G. Tamamschjan in B.K. Schischkin, 1959
- Genus Kentrophyllum Necker ex A.P. de Candolle, 1810 accepted as Carthamus Linnaeus, 1753
- Genus Keringa Rafinesque, 1838
- Genus Kerneria Moench, 1794
- Genus Keysseria Lauterbach, 1914
- Genus Khasianthus H.E. Robinson & J.J. Skvarla, 2009
- Genus Kieslingia L. Faúndez, P. Saldivia & A. Marticorena in Saldivia et al., 2014
- Genus Kilicia Ş. Yıldırımlı, 2022 accepted as Scorzonera Linnaeus, 1753
- Genus Kinghamia C. Jeffrey, 1988
- Genus Kingianthus H. Robinson, 1978
- Genus Kippistia F. von Mueller, 1858 accepted as Minuria A.P. de Candolle, 1836
- Genus Kirkianella H.H. Allan, 1961
- Genus Kitamuraea S. Rauschert, 1982 accepted as Aster Linnaeus, 1753
- Genus Kitamuraster J. Soják, 1982 accepted as Aster Linnaeus, 1753
- Genus Kitamuria G.L. Nesom, 2020
- Genus Klasea Cassini in F. Cuvier, 1825
- Genus Klaseopsis L. Martins, 2006
- Genus Kleinia P. Miller, 1754
- Genus Kleinia A.L. Jussieu, 1803
- Genus Kleinia N.J. Jacquin, 1760
- Genus Klenzea C.H. Schultz-Bipontinus ex W.G. Walpers, 1843
- Genus Klomion Adanson, 1763
- Genus Koanophyllon M. Arruda da Camara in H. Koster, 1816
- Genus Koanophyllum M. Arruda da Cámara ex H. Koster, 1817 accepted as Koanophyllon M. Arruda da Camara in H. Koster, 1816
- Genus Koechlea Endlicher, 1842 accepted as Ptilostemon Cassini, 1816
- Genus Koehneola Urban, 1901
- Genus Koelpinia Pallas, 1776
- Genus Kovalevskiella R.V. Kamelin in T.A. Adylov & T.I. Zuckerwanik, 1993
- Genus Koyamacalia H.E. Robinson & R.D. Brettell, 1973
- Genus Koyamasia H.E. Robinson, 1999
- Genus Kraussia C.H. Schultz-Bipontinus, 1844
- Genus Kremeria Durieu de Maisonneuve, 1846 accepted as Leucanthemum P. Miller, 1754
- Genus Krenamon Adanson, 1763
- Genus Krigia Schreber, 1791
- Genus Krylovia B.K. Schischkin in P.N. Krylov, 1949 accepted as Aster Linnaeus, 1753
- Genus Kuhnia Linnaeus, 1763 accepted as Brickellia S. Elliott, 1823
- Genus Kuhniodes Post & O. Kuntze, 1903
- Genus Kurziella H.E. Robinson & S. Bunwong, 2010
- Genus Kyhosia B.G. Baldwin, 1999
- Genus Kymapleura (Nuttall) Nuttall, 1841
- Genus Kyrstenia Necker ex E.L. Greene, 1903
- Genus Kyrsteniopsis R.M. King & H.E. Robinson, 1971
- Genus Laceanthos J.F. Pruski, 2023
- Genus Lacellia Viviani, 1824 accepted as Laserpitium Linnaeus, 1753
- Genus Lachanodes A.P. de Candolle, 1833
- Genus Lachnophyllum Bunge, 1852
- Genus Lachnorhiza A. Richard in Sagra, 1850
- Genus Lachnospermum Willdenow, 1803
- Genus Lachnothalamus F. von Mueller, 1863
- Genus Laciala O. Kuntze in Post & O. Kuntze, 1903 accepted as Schizoptera P.K.N.S. Turczaninow, 1851
- Genus Lacinaria J. Hill, 1762 accepted as Liatris J. Gaertner ex Schreber, 1791
- Genus Lactuca Linnaeus, 1753
- Genus Lactucella E.A. Nazarova, 1990 accepted as Lactuca Linnaeus, 1753
- Genus Lactucopsis C.H. Schultz-Bipontinus ex R. Visiani, 1870 accepted as Lactuca Linnaeus, 1753
- Genus Lactucosonchus (C.H. Schultz-Bipontinus) E.R. Sventenius, 1969
- Genus Laennecia Cassini in F. Cuvier, 1822
- Genus Laënnecia Cassini in F. Cuvier, 1822 represented as Laennecia Cassini in F. Cuvier, 1822
- Genus Laestadia Kunth ex Lessing, 1832
- Genus Lagasca Cavanilles, 1803
- Genus Lagascea Cavanilles, 1803
- Genus Lagedium J. Soják, 1961 accepted as Lactuca Linnaeus, 1753
- Genus Lagenifera Cassini, 1816 accepted as Lagenophora Cassini, 1818
- Genus Lagenithrix G.L. Nesom, 1994 accepted as Pappochroma Rafinesque, 1837
- Genus Lagenocypsela U. Swenson & K. Bremer, 1994
- Genus Lagenofera Cassini, 1816
- Genus Lagenopappus G.L. Nesom, 1994 accepted as Pappochroma Rafinesque, 1837
- Genus Lagenophora Cassini, 1818
- Genus Laggera C.H. Schultz-Bipontinus ex Bentham & J.D. Hooker, 1873
- Genus Lagophylla Nuttall, 1841
- Genus Lagoseriopsis M.E. Kirpicznikov in E.G. Bobrov & N.N. Tzvelev, 1964
- Genus Lagoseris Marschall von Bieberstein, 1810 accepted as Crepis Linnaeus, 1753
- Genus Lagoseris Hoffmannsegg & Link, 1820-1828
- Genus Lagothamnus Nuttall, 1841
- Genus Lagurostemon Cassini in F. Cuvier, 1828
- Genus Lalda Bubani, 1899
- Genus Lamottea Pomel, 1860
- Genus Lamprachaenium Bentham in Bentham & J.D. Hooker, 1873
- Genus Lamprocephalus B. Nordenstam, 1976
- Genus Lamprochlaena F. von Mueller, 1863
- Genus Lampropappus (K.A.O. Hoffmann) H.E. Robinson, 1999
- Genus Lampsana P. Miller, 1754
- Genus Lamyra (Cassini) Cassini in F. Cuvier, 1822 accepted as Ptilostemon Cassini, 1816
- Genus Lamyropappus Knorring & S.G. Tamamschjan, 1954
- Genus Lamyropsis (A.L. Charadze) M. Dittrich, 1971
- Genus Lancisia Fabricius, 1759
- Genus Lancisia Lamarck, 1797
- Genus Landerolaria G.L. Nesom, 2020
- Genus Landtia Lessing, 1832 accepted as Haplocarpha Lessing, 1831
- Genus Langebergia A.A. Anderberg, 1991
- Genus Lanipila Burchell, 1822
- Genus Lantanopsis C. Wright ex Grisebach, 1862
- Genus Lanugothamnus L.P. Deble, 2012
- Genus Lapeirousia Thunberg, 1801 accepted as Schistostephium Lessing, 1832
- Genus Laphamia A. Gray, 1852 accepted as Perityle Bentham, 1844
- Genus Laphangium (O.M. Hilliard & B.L. Burtt) N.N. Tzvelev, 1994
- Genus Lapidia N. Roque & S.C. Ferreira in N. Roque, S.C. Ferreira & C. van den Berg, 2017
- Genus Lappa Scopoli, 1754 accepted as Arctium Linnaeus, 1753
- Genus Lapsana Linnaeus, 1753
- Genus Lapsanastrum J.-H. Pak & K. Bremer, 1995
- Genus Lapsyoungia Hiyama, 1953
- Genus Lasallea E.L. Greene, 1903 accepted as Aster Linnaeus, 1753
- Genus Lasianthaea A.P. de Candolle, 1836
- Genus Lasianthea S.F.L. Endlicher, 1841 accepted as Lasianthaea A.P. de Candolle, 1836
- Genus Lasiocephalus Willdenow ex D.F.L. Schlechtendal, 1818 accepted as Senecio Linnaeus, 1753
- Genus Lasiocoma H. Bolus, 1907 accepted as Euryops (Cassini) Cassini in F. Cuvier, 1820
- Genus Lasiolaena R.M. King & H.E. Robinson, 1972
- Genus Lasiolaenia R.M. King & H.E. Robinson, 1972 accepted as Lasiolaena R.M. King & H.E. Robinson, 1972
- Genus Lasiopogon Cassini, 1818
- Genus Lasiopus Cassini, 1817
- Genus Lasiopus D. Don in Sweet, 1836
- Genus Lasiorrhiza Lagasca, 1811
- Genus Lasiospermum M. Lagasca, 1816
- Genus Lasiospora Cassini in F. Cuvier, 1822 accepted as Gelasia Cassini, 1818
- Genus Lasthenia Cassini, 1834
- Genus Latreillea A.P. de Candolle, 1836
- Genus Launaea Cassini in F. Cuvier, 1822
- Genus Lavenia O. Swartz, 1788
- Genus Lavidia R.A. Philippi, 1894
- Genus Lawrencella J. Lindley, 1839
- Genus Laxanon Rafinesque, 1837
- Genus Laxmannia J.R. Forster & J.G.A. Forster, 1775
- Genus Layia W.J. Hooker & Arnott ex A.P. de Candolle, 1838
- Genus Leachia Cassini in F. Cuvier, 1822
- Genus Lebetina Cassini in F. Cuvier, 1822 accepted as Adenophyllum Persoon, 1807
- Genus Lecocarpus Decaisne, 1846
- Genus Lefrovia Franchet, 1888
- Genus Leiachenis Rafinesque, 1837
- Genus Leibnitzia Cassini in F. Cuvier, 1822
- Genus Leiboldia Schlechtendal ex H.A. Gleason, 1906
- Genus Leighia Cassini in F. Cuvier, 1822
- Genus Leighia Scopoli, 1777
- Genus Leiocarpa P.G. Wilson, 2001
- Genus Leiodon Shuttlew. ex Sherff, 1936 accepted as Coreopsis Linnaeus, 1753
- Genus Leioligo Rafinesque, 1837
- Genus Lembertia E.L. Greene, 1897 accepted as Monolopia A.P. de Candolle, 1838
- Genus Lemmatium A.P. de Candolle, 1836
- Genus Lemooria P.S. Short, 1989
- Genus Leonis B. Nordenstam, 2006
- Genus Leontodon Linnaeus, 1753
- Genus Leontonyx A.H.G. de Cassini, 1822 accepted as Helichrysum P. Miller, 1754
- Genus Leontophthalmum Willdenow, 1807
- Genus Leontopodium R. Brown ex Cassini, 1819
- Genus Leontoroides B. Bock, 2012
- Genus Lepachys Rafinesque, 1819 accepted as Ratibida Rafinesque, 1817
- Genus Lepia J. Hill, 1759 accepted as Zinnia Linnaeus, 1759
- Genus Lepiactis Rafinesque, 1837
- Genus Lepicaune Lapeyrouse, 1813
- Genus Lepidanthus Nuttall, 1841 accepted as Matricaria Linnaeus, 1753
- Genus Lepidaploa (Cassini) Cassini in F. Cuvier, 1825
- Genus Lepidesmia Klatt, 1896
- Genus Lepidolopha C. Winkler, 1894
- Genus Lepidolopsis P.P. Poljakov, 1959
- Genus Lepidonema F.E.L. Fischer & C.A. Meyer, 1836
- Genus Lepidonia S.F. Blake, 1936
- Genus Lepidophorum Necker ex Cassini in F. Cuvier, 1823
- Genus Lepidophyllum Cassini, 1816
- Genus Lepidopogon Tausch, 1829
- Genus Lepidoseris (H.G.L. Reichenbach) Fourreau, 1869
- Genus Lepidospartum A. Gray, 1883
- Genus Lepidostephanus Bartling, 1838
- Genus Lepidostephium D. Oliver, 1868
- Genus Lepidotheca Nuttall, 1841 accepted as Matricaria Linnaeus, 1753
- Genus Lepiscline Cassini, 1818
- Genus Lepisiphon Turczaninow, 1851
- Genus Leptilon Rafinesque ex N.L. Britton & A. Brown, 1898
- Genus Leptinella Cassini, 1822
- Genus Leptocarpha A.P. de Candolle, 1836
- Genus Leptoclinium (Nuttall) A. Gray, 1879
- Genus Leptoclinium G. Gardner ex Bentham & J.D. Hooker, 1873
- Genus Leptocoma Lessing, 1831
- Genus Leptogyne Lessing, 1831
- Genus Leptopharynx Rydberg, 1914 accepted as Perityle Bentham, 1844
- Genus Leptophora Rafinesque, 1819
- Genus Leptophytus Cassini, 1817
- Genus Leptopoda Nuttall, 1818
- Genus Leptorhynchos Lessing, 1832
- Genus Leptoseris Nuttall, 1841 accepted as Malacothrix A.P. de Candolle, 1838
- Genus Leptostelma D. Don in Sweet, 1830
- Genus Leptosyne A.P. de Candolle, 1836 accepted as Coreopsis Linnaeus, 1753
- Genus Leptothamnus A.P. de Candolle, 1836
- Genus Leptotriche Turczaninow, 1851
- Genus Leria A.P. de Candolle, 1812
- Genus Lescaillea Grisebach, 1866
- Genus Lessingia Chamisso, 1829
- Genus Lessingianthus H.E. Robinson, 1988
- Genus Leto R.A. Philippi, 1891 accepted as Helogyne Nuttall, 1841
- Genus Lettowia H. Robinson & J.J. Skvarla, 2013
- Genus Leucacantha J.A. Nieuwland & J. Lunell, 1917 accepted as Centaurea Linnaeus, 1753
- Genus Leucactinia Rydberg, 1915
- Genus Leucampyx A. Gray ex Bentham & J.D. Hooker, 1873 accepted as Hymenopappus L'Héritier de Brutelle, 1788
- Genus Leucantanacetum S. Rauschert, 1973
- Genus Leucantha S.F. Gray, 1821
- Genus Leucanthemella N.N. Tzvelev in B.K. Schischkin & E.G. Bobrov, 1961
- Genus Leucanthemopsis (Giroux) V.H. Heywood, 1975
- Genus Leucanthemum J. Burman ex O. Kuntze, 1891
- Genus Leucanthemum P. Miller, 1754
- Genus Leucelene E.L. Greene, 1896 accepted as Chaetopappa A.P. de Candolle, 1836
- Genus Leucheria Lagasca, 1811
- Genus Leuciva Rydberg, 1922
- Genus Leucoblepharis Arnott, 1838
- Genus Leucochrysum (A.P. de Candolle) P.G. Wilson, 1992
- Genus Leucocyclus Boissier, 1849 accepted as Achillea Linnaeus, 1753
- Genus Leucogenes Beauverd, 1910
- Genus Leucoglossum B.H. Wilcox, K. Bremer & C.J. Humphries in K. Bremer & C.J. Humphries, 1993 accepted as Mauranthemum R. Vogt & C. Oberprieler, 1995
- Genus Leucomeris D. Don, 1825
- Genus Leucopholis G. Gardner, 1843 accepted as Chionolaena A.P. de Candolle, 1836
- Genus Leucophyta R. Brown, 1817
- Genus Leucopodum G. Gardner, 1845
- Genus Leucopsidium Charpentier ex A.P. de Candolle, 1838 accepted as Aphanostephus A.P. de Candolle, 1836
- Genus Leucopsis (A.P. de Candolle) J.G. Baker in C.F.P. Martius, 1882
- Genus Leucoptera B. Nordenstam, 1976
- Genus Leucopyrethrum J. Dostál, 1984
- Genus Leucoraoulia L.C. Cockayne & H.H. Allan in H.H. Allan, 1939
- Genus Leucoseris Nuttall, 1841
- Genus Leucostemma D. Don, 1826
- Genus Leucosyris E.L. Greene, 1897 accepted as Chloracantha G.L. Nesom, Y.B. Suh, D.R. Morgan, S.D. Sudberg & B.B. Simpson, 1991
- Genus Leucozoma T.L. Collins, 2022
- Genus Leunisia R.A. Philippi, 1863
- Genus Leuzea A.P. de Candolle in Lamarck & A.P. de Candolle, 1805 accepted as Rhaponticum S. Vaillant, 1754
- Genus Leveillea Vaniot, 1903 accepted as Blumea A.P. de Candolle, 1833
- Genus Leysera Linnaeus, 1763
- Genus Liabellum Rydberg, 1927 accepted as Sinclairia W.J. Hooker & Arnott, 1841
- Genus Liabellum A.L. Cabrera, 1954
- Genus Liabum Adanson, 1763
- Genus Liatris J. Gaertner ex Schreber, 1791
- Genus Libanothamnus A. Ernst, 1870
- Genus Libinhania N. Kilian, M. Galbany-Casals, C. Oberprieler & A. Miller in N. Kilian et al., 2017
- Genus Lidbeckia P.J. Bergius, 1767
- Genus Lieberkuhna Cassini in F. Cuvier, 1823
- Genus Lifago Schweinfurth & Muschler, 1911
- Genus Ligularia Cassini, 1816
- Genus Ligulariopsis Y.L. Chen, 1996
- Genus Liguparasenecio H. Ohashi & K. Ohashi, 2008
- Genus Lihengia Y.S. Chen & R. Ke, 2021
- Genus Lilacina Ş. Yıldırımlı, 2020 accepted as Pseudopodospermum (S.J. Lipschitz & I.M. Krascheninnikov) S.I. Kuthatheladze, 1978
- Genus Limbarda Adanson, 1763
- Genus Limnogenneton C.H. Schultz-Bipontinus ex Walpers, 1846
- Genus Limonoseris Petermann, 1838
- Genus Lindheimera A. Gray & Engelmann, 1847
- Genus Linealia G.L. Nesom, 2020
- Genus Linochilus Bentham, 1845
- Genus Linosyris Cassini in F. Cuvier, 1825 accepted as Aster Linnaeus, 1753
- Genus Linsecomia Buckley, 1861
- Genus Linzia C.H. Schultz-Bipontinus ex Walpers, 1843
- Genus Lioydia Necker ex Rafinesque, 1837
- Genus Lipoblepharis A.E. Orchard, 2013
- Genus Lipochaeta A.P. de Candolle, 1836
- Genus Lipotriche R. Brown, 1817
- Genus Lipschitzia M.A. Zaika, A.P. Sukhorukov & N. Kilian, 2020
- Genus Lipschitziella R.V. Kamelin in T.A. Adylov & T.I. Zuckerwanik, 1993
- Genus Lipskyella S.V. Juzepczuk, 1937 accepted as Cousinia Cassini in F. Cuvier, 1827
- Genus Litogyne W.H. Harvey, 1863
- Genus Litothamnus R.M. King & H.E. Robinson, 1979
- Genus Litrisa J.K. Small, 1924
- Genus Llerasia Triana, 1858
- Genus Logfia Cassini, 1819
- Genus Lomanthus B. Nordenstam & P.B. Pelser, 2009
- Genus Lomatolepis Cassini in F. Cuvier, 1827
- Genus Lomatozona J.G. Baker in C.F.P. Martius, 1876
- Genus Lomaxeta Rafinesque, 1838
- Genus Lonas Adanson, 1763
- Genus Longchampia Willdenow, 1811
- Genus Lophactis Rafinesque, 1824
- Genus Lophiocirsium E. Del Guacchio, P. Bureš, D. Iamonico & P. Caputo in Del Guacchio et al., 2022
- Genus Lophiolepis (Cassini) Cassini in F. Cuvier, 1823
- Genus Lophoclinium Endlicher, 1843
- Genus Lopholaena A.P. de Candolle, 1838
- Genus Lopholoma Cassini in F. Cuvier, 1826
- Genus Lophopappus H.H. Rusby, 1894
- Genus Lorandersonia L.E. Urbatsch, R.P. Roberts & K.M. Neubig, 2005
- Genus Lordhowea B. Nordenstam, 1978
- Genus Lorentea Lessing, 1830
- Genus Lorentea Lagasca, 1816
- Genus Lorentea Ortega, 1797
- Genus Lorentzia Grisebach, 1874
- Genus Lorentzianthus R.M. King & H.E. Robinson, 1975
- Genus Loricaria H.A. Weddell, 1856 accepted as Andicolea L. Mayta & E. Molinari-Novoa, 2021
- Genus Lourteigia R.M. King & H.E. Robinson, 1971
- Genus Lowellia A. Gray, 1849 accepted as Thymophylla Lagasca, 1816
- Genus Lowryanthus J.F. Pruski, 2014
- Genus Loxodon Cassini in F. Cuvier, 1823
- Genus Loxothysanus B.L. Robinson, 1907
- Genus Lucilia Cassini, 1817
- Genus Luciliocline A.A. Anderberg & S.E. Freire, 1991
- Genus Luciliopsis Weddell, 1856 accepted as Chaetanthera Ruiz & Pavon, 1794
- Genus Lugoa A.P. de Candolle, 1838 accepted as Gonospermum Lessing, 1832
- Genus Luina Bentham, 1873
- Genus Lulia E.M. Zardini, 1980
- Genus Lundellianthus H.E. Robinson, 1978
- Genus Lundinia R.B. Nordenstam, 2006
- Genus Lupsia Necker ex O. Kuntze, 1891
- Genus Luteidiscus H. St. John, 1974
- Genus Luthera C.H. Schultz-Bipontinus, 1836
- Genus Lycapsus R.A. Philippi, 1870
- Genus Lychnocephalus C.F.P. Martius ex A.P. de Candolle, 1836
- Genus Lychnophora C.F.P. Martius, 1822
- Genus Lychnophorella B. Loeuille, J. Semir & J.R. Pirani, 2019
- Genus Lychnophoriopsis C.H. Schultz-Bipontinus, 1863
- Genus Lycoseris Cassini in F. Cuvier, 1824
- Genus Lycotis Hoffmannsegg, 1826
- Genus Lygodesma accepted as Lygodesmia D. Don, 1829
- Genus Lygodesmia D. Don, 1829
- Genus Lyonnetia Cassini in F. Cuvier, 1825
- Genus Lyrolepis K.H. Rechinger, 1943
- Genus Lysichlamys R.H. Compton, 1943
- Genus Lysistemma Steetz in Peters, 1864
- Genus Macdougalia A.A. Heller, 1898 accepted as Hymenoxys Cassini in F. Cuvier, 1828
- Genus Macella C. Koch, 1856
- Genus Machaeranthera C.G.D. Nees, 1832
- Genus Machlis A.P. de Candolle, 1837
- Genus Macledium Cassini in F. Cuvier, 1825
- Genus Macowania D. Oliver, 1870
- Genus Macrachaenium J.D. Hooker, 1846
- Genus Macraea J.D. Hooker, 1847
- Genus Macrocarphus Nuttall, 1841
- Genus Macrocephalus J. Lindley, 1846
- Genus Macroclinidium Maximowicz, 1871
- Genus Macronema Nuttall, 1840 accepted as Ericameria Nuttall, 1840
- Genus Macropertya Honda, 1937
- Genus Macropodina R.M. King & H.E. Robinson, 1972
- Genus Macrorhynchus Lessing, 1832 accepted as Agoseris Rafinesque, 1817
- Genus Macvaughiella R.M. King & H.E. Robinson, 1968
- Genus Madacarpus R. Wight, 1846
- Genus Madagaster G.L. Nesom, 1993
- Genus Madaractis A.P. de Candolle, 1838
- Genus Madaria A.P. de Candolle, 1836
- Genus Madariopsis Nuttall, 1841
- Genus Madaroglossa A.P. de Candolle, 1836 accepted as Layia W.J. Hooker & Arnott ex A.P. de Candolle, 1838
- Genus Madia Molina, 1782
- Genus Madorella Nuttall, 1841
- Genus Mairia C.G.D. Nees, 1832
- Genus Maja Weddell, 1857
- Genus Malacocephalus Tausch, 1828
- Genus Malacolepis A.A. Heller, 1906
- Genus Malacomeris Nuttall, 1841
- Genus Malacothrix A.P. de Candolle, 1838
- Genus Mallinoa Coulter, 1895
- Genus Mallotopus Franchet & Savatier, 1878
- Genus Malmeanthus R.M. King & H. Robinson, 1980
- Genus Malperia S. Watson, 1889
- Genus Mandonia Weddell, 1864
- Genus Mandonia C.H. Schultz-Bipontinus, 1865
- Genus Manopappus C.H. Schultz-Bipontinus, 1844
- Genus Mantisalca Cassini, 1818
- Genus Manyonia H.E. Robinson, 1999
- Genus Marasmodes A.P. de Candolle, 1838
- Genus Marcelia Cassini in F. Cuvier, 1825
- Genus Margacola Buckley, 1862
- Genus Margarita Gaudin, 1829
- Genus Mariacantha Bubani, 1899
- Genus Mariana J. Hill, 1762
- Genus Marschallia F.G. Bartling, 1830 accepted as Marshallia Schreber, 1791
- Genus Marsea Adanson, 1763
- Genus Marshallia Schreber, 1791
- Genus Marshalljohnstonia J. Henrickson, 1976
- Genus Marticorenia J.V. Crisci, 1974
- Genus Martinia E. Vaniot, 1903
- Genus Martrasia Lagasca, 1811
- Genus Maruta (Cassini) S.F. Gray, 1821
- Genus Maschalostachys B. Loeuille & N. Roque, 2017
- Genus Mastigophorus Cassini in F. Cuvier, 1825
- Genus Mastrucium Cassini in F. Cuvier, 1825
- Genus Matamoria La Llave in La Llave & Lexarza, 1824
- Genus Mataxa K.P.J. Sprengel, 1827
- Genus Matricaria Linnaeus, 1753
- Genus Matricarioides (Lessing) Spach, 1841
- Genus Matrichamomilla S. Rauschert, 1974
- Genus Mattfeldanthus H. Robinson & R.M. King, 1979
- Genus Mattfeldia Urban, 1931
- Genus Matudina R.M. King & H.E. Robinson, 1973
- Genus Mauchia O. Kuntze, 1891
- Genus Mauranthemum R. Vogt & C. Oberprieler, 1995
- Genus Mausolea P.P. Poljakov, 1961
- Genus Mazzettia Iljin, 1955
- Genus Mecomischus Cosson & Durieu ex Bentham & J.D. Hooker, 1873
- Genus Medicusia Moench, 1794
- Genus Medranoa L.E. Urbatsch & R.P. Roberts, 2004
- Genus Megaliabum Rydberg, 1927
- Genus Megalodonta E.L. Greene, 1901
- Genus Meisteria Scopoli, 1777
- Genus Melalema J.D. Hooker, 1846
- Genus Melampodium Linnaeus, 1753
- Genus Melananthera A. Michaux, 1803
- Genus Melanchrysum Cassini, 1817
- Genus Melanodendron A.P. de Candolle, 1836
- Genus Melanoloma Cassini in F. Cuvier, 1823
- Genus Melanoseris Decaisne in Jacquemont, 1841-1843
- Genus Melanthera Rohr, 1792
- Genus Melitella Sommier, 1907
- Genus Mendezia A.P. de Candolle, 1836 accepted as Zinnia Linnaeus, 1759
- Genus Menomphalus Pomel, 1874
- Genus Menotriche Steetz in W.C.H. Peters, 1864
- Genus Meratia Cassini in F. Cuvier, 1824
- Genus Meridiana J. Hill, 1761 accepted as Gazania J. Gaertner, 1791
- Genus Merope Weddell, 1856
- Genus Merrittia E.D. Merrill, 1910
- Genus Mesadenia Rafinesque, 1838 accepted as Arnoglossum Rafinesque, 1817
- Genus Mesanthophora H. Robinson, 1992
- Genus Mesocentron Cassini in F. Cuvier, 1826
- Genus Mesodetra Rafinesque, 1817
- Genus Mesogramma A.P. de Candolle, 1838
- Genus Mesoligus Rafinesque, 1837
- Genus Mesoneuris A. Gray, 1873
- Genus Metabasis A.P. de Candolle, 1838
- Genus Metagnanthus Endlicher, 1838
- Genus Metalasia R. Brown, 1817
- Genus Metamyriactis G.L. Nesom, 2020
- Genus Metastevia J.L. Grashoff, 1975 accepted as Stevia Cavanilles, 1797
- Genus Metazanthus F.J.F. Meyen, 1834
- Genus Meteorina Cassini, 1818
- Genus Mexerion G.L. Nesom, 1990
- Genus Mexianthus B.L. Robinson, 1928
- Genus Meyera Schreber, 1791
- Genus Meyerafra O. Kuntze, 1891
- Genus Meyeria A.P. de Candolle, 1836
- Genus Micania accepted as Mikania Willdenow, 1803
- Genus Micractis A.P. de Candolle, 1836
- Genus Micrelium Forsskål, 1775
- Genus Microbahia Cockerell, 1907 accepted as Syntrichopappus A. Gray in Torrey, 1857
- Genus Microcalia A. Richard in Dumont d' Urville, 1832
- Genus Microcephala E.G. Pobedimova, 1961
- Genus Microchaeta Nuttall, 1841
- Genus Microchaete Bentham, 1845 accepted as Monticalia C. Jeffrey, 1992
- Genus Microcoecia J.D. Hooker, 1847
- Genus Microderis A.P. de Candolle, 1838 accepted as Leontodon Linnaeus, 1753
- Genus Microdonta Nuttall, 1841
- Genus Microglossa A.P. de Candolle, 1836
- Genus Microgyne Lessing, 1832
- Genus Microgyne Cassini, 1827 accepted as Eriocephalus Linnaeus, 1753
- Genus Microgynella J. Grau, 1975 accepted as Microgyne Lessing, 1832
- Genus Microlecane Schultz-Bipontinus ex Bentham & J.D. Hooker, 1873 accepted as Bidens Linnaeus, 1753
- Genus Microliabum Cabrera, 1955
- Genus Microlonchoides Candargy, 1897 accepted as Jurinea Cassini, 1821
- Genus Microlonchus Cassini in F. Cuvier, 1826
- Genus Microlophopsis S.K. Czerepanov, 1960
- Genus Microlophus Cassini in F. Cuvier, 1826
- Genus Micropappus (Schultz-Bipontinus) C.F. Baker, 1902
- Genus Micropsis A.P. de Candolle, 1836
- Genus Micropus Linnaeus, 1753
- Genus Microrhynchus Lessing, 1832
- Genus Microseris D. Don, 1832
- Genus Microspermum Lagasca, 1816
- Genus Microstephium Lessing, 1831 accepted as Arctotheca J.C. Wendland, 1798
- Genus Microtrichia A.P. de Candolle, 1836 accepted as Grangea Adanson, 1763
- Genus Mieria La Llave in La Llave & Lexarza, 1825
- Genus Mikania Willdenow, 1803
- Genus Mikania F.W. Schmidt, 1795
- Genus Mikaniopsis Milne-Redhead in Exell, 1956
- Genus Millefolium P. Miller, 1754
- Genus Milleria Linnaeus, 1753
- Genus Millina Cassini in F. Cuvier, 1824
- Genus Millotia Cassini, 1829
- Genus Mimela R.A. Philippi, 1865 accepted as Leucheria Lagasca, 1811
- Genus Minasia H.E. Robinson, 1992
- Genus Minuranthus F. von Mueller, 1853
- Genus Minuria A.P. de Candolle, 1836
- Genus Minuriella Tate, 1899
- Genus Minurothamnus A.P. de Candolle, 1838
- Genus Minyranthes Turczaninow, 1851
- Genus Mirasolia (Schultz-Bipontinus) Bentham & J.D. Hooker, 1873 accepted as Tithonia Desfontaines ex A.L. Jussieu, 1789
- Genus Miricacalia Kitamura, 1936
- Genus Misbrookea V.A. Funk, 1997
- Genus Mitina Adanson, 1763
- Genus Mixtecalia R. Redonda-Martínez, A. García-Mendoza & D. Sandoval-Gutiérrez in García-Mendoza et al., 2020
- Genus Miyamayomena S. Kitamura, 1982 accepted as Aster Linnaeus, 1753
- Genus Mnesiteon Rafinesque, 1817 accepted as Balduina Nuttall, 1818
- Genus Mniodes (A. Gray) Bentham & J.D. Hooker, 1873
- Genus Mocinna Lagasca, 1816
- Genus Modestia A. Charadze & S.G. Tamamschjan, 1956 accepted as Anacantha (M.M. Iljin) J. Soják, 1982
- Genus Mojiangia Z.-H. Wang, N. Kilian & H. Peng in Yin et al., 2021
- Genus Molina Ruiz & Pavon, 1794 accepted as Baccharis Linnaeus, 1753
- Genus Mollera O. Hoffmann in Engler & Prantl, 1890 accepted as Calostephane Bentham, 1872
- Genus Molpadia (Cassini) Cassini in F. Cuvier, 1822 accepted as Telekia J.C.G. Baumgarten, 1816
- Genus Monactinocephalus Klatt, 1896
- Genus Monactis Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Monanthemum Grisebach, 1861
- Genus Monarrhenus Cassini, 1817
- Genus Monencyanthes A. Gray, 1852
- Genus Monenteles Labillardière, 1825 accepted as Pterocaulon S. Elliott, 1823
- Genus Moniermos J.D. Hooker, 1852 accepted as Microseris D. Don, 1832
- Genus Monilifera Adanson, 1763
- Genus Monochlaena Cassini in F. Cuvier, 1827
- Genus Monoculus B. Nordenstam, 2006
- Genus Monogereion G.M. Barroso & R.M. King, 1971
- Genus Monolopia A.P. de Candolle, 1838
- Genus Monophalacrus Cassini in F. Cuvier, 1828
- Genus Monopholis S.F. Blake, 1922 accepted as Monactis Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Monoptera C.H. Schultz-Bipontinus in P.B. Webb & S. Berthelot, 1844
- Genus Monoptilon J. Torrey & A. Gray, 1845
- Genus Monosis A.P. de Candolle in R. Wight, 1834
- Genus Monothrix J. Torrey in Stansbury, 1852
- Genus Montagnaea A.P. de Candolle
- Genus Montanoa Cervantes in La Llave & Lexarza, 1825
- Genus Monticalia C. Jeffrey, 1992
- Genus Moonia Arnott, 1836
- Genus Moquinia A.P. de Candolle, 1838
- Genus Moquiniastrum (Cabrera) G. Sancho in G. Sancho, V.A. Funk & N. Roque, 2013
- Genus Morithamnus R.M. King, H.E. Robinson & G.M. Barroso, 1979
- Genus Morna J. Lindley, 1837
- Genus Morysia Cassini in F. Cuvier, 1824
- Genus Moscharia Ruiz & Pavon, 1794
- Genus Moschifera Molina, 1810
- Genus Mosigia K.P.J. Sprengel, 1826
- Genus Msuata O. Hoffmann in Engler & Prantl, 1894
- Genus Mtonia H.J. Beentje, 1999
- Genus Muellerolaria G.L. Nesom, 2020
- Genus Mulgedium Cassini in F. Cuvier, 1824 accepted as Lactuca Linnaeus, 1753
- Genus Munnozia Ruiz & Pavon, 1794
- Genus Munychia Cassini in F. Cuvier, 1825
- Genus Munzothammus accepted as Munzothamnus Raven, 1963
- Genus Munzothamnus Raven, 1963
- Genus Muschleria S.M. Moore, 1914
- Genus Muscosomorphe J.C. Manning in Manning & Govaerts, 2021
- Genus Musilia J. Velenovský, 1923 accepted as Rhanterium Desfontaines, 1799
- Genus Mussinia Willdenow, 1803
- Genus Mustelia K.P.J. Sprengel, 1802 accepted as Stevia Cavanilles, 1797
- Genus Musteron Rafinesque, 1837
- Genus Mutisia Linnaeus f., 1782
- Genus Myanmaria H.E. Robinson, 1999
- Genus Mycelis Cassini in F. Cuvier, 1824 accepted as Cicerbita Wallroth, 1822
- Genus Myconia C.H. Schultz-Bipontinus in P.B. Webb & S. Berthelot, 1844
- Genus Myctanthes Rafinesque, 1837
- Genus Myopordon Boissier, 1846
- Genus Myoseris J.H.F. Link, 1822
- Genus Myriactis Lessing, 1831
- Genus Myriadenus Cassini, 1817
- Genus Myriocephalus Bentham in Endlicher et al., 1837
- Genus Myriogyne Lessing, 1831
- Genus Myripnois Bunge, 1833
- Genus Myrovernix M. Koekemoer, 2019
- Genus Myscolus (Cassini) Cassini in F. Cuvier, 1822 accepted as Scolymus Linnaeus, 1753
- Genus Myxopappus M. Källersjö, 1988
- Genus Nabalus Cassini in F. Cuvier, 1825
- Genus Nablonium Cassini in F. Cuvier, 1825 accepted as Ammobium R. Brown in J. Sims, 1824
- Genus Nacrea A. Nelson, 1899
- Genus Nahuatlea V.A. Funk in Funk et al., 2017
- Genus Namibithamnus H. Robinson, J. Skvarla & V.A. Funk, 2016
- Genus Nananthea A.P. de Candolle, 1837
- Genus Nannoglottis Maximowicz, 1881
- Genus Nannoseris Hedberg, 1957
- Genus Nanothamnus T. Thomson, 1867
- Genus Narbalia Rafinesque, 1838
- Genus Nardophyllum (W.J. Hooker & Arnott) W.J. Hooker & Arnott in W.J. Hooker, 1836
- Genus Nardosmia Cassini in F. Cuvier, 1825 accepted as Petasites P. Miller, 1754
- Genus Narvalina Cassini in F. Cuvier, 1825
- Genus Nassauvia Commerson ex A.L. Jussieu, 1789
- Genus Nauenburgia Willdenow, 1803
- Genus Nauplius (Cassini) Cassini in F. Cuvier, 1822 accepted as Asteriscus P. Miller, 1754
- Genus Neactelis Rafinesque, 1838
- Genus Neblinaea B. Maguire & J.J. Wurdack, 1957
- Genus Needhamia Cassini in F. Cuvier, 1825
- Genus Neesia K.P.J. Sprengel, 1818
- Genus Neilreichia Fenzl, 1850 accepted as Schistocarpha Lessing, 1831
- Genus Neja D. Don in Sweet, 1831
- Genus Nelsonianthus H.E. Robinson & R.D. Brettell, 1973
- Genus Nematopus A. Gray, 1851
- Genus Nemauchenes Cassini, 1818
- Genus Nemosenecio (S. Kitamura) B. Nordenstam, 1978
- Genus Nemoseris E.L. Greene, 1891 accepted as Rafinesquia Nuttall, 1841
- Genus Neobartlettia R.M. King & H.E. Robinson, 1971 accepted as Bartlettina R.M. King & H.E. Robinson, 1971
- Genus Neobrachyactis L. Brouillet, 2011
- Genus Neocabreria R.M. King & H.E. Robinson, 1972
- Genus Neocaldasia Cuatrecasas, 1944
- Genus Neoceis Cassini, 1820
- Genus Neocuatrecasia R.M. King & H.E. Robinson, 1970
- Genus Neohintonia R.M. King & H.E. Robinson, 1971 accepted as Koanophyllon M. Arruda da Camara in H. Koster, 1816
- Genus Neojeffreya A.L. Cabrera, 1978
- Genus Neolaria G.L. Nesom, 2020
- Genus Neomirandea R.M. King & H.E. Robinson, 1970
- Genus Neomolina F.H. Hellwig, 1993 accepted as Baccharis Linnaeus, 1753
- Genus Neonesomia L.E. Urbatsch & R.P. Roberts, 2004
- Genus Neopallasia P.P. Poljakov, 1955
- Genus Neothymopsis N.L. Britton & Millspaugh, 1920 accepted as Thymopsis Bentham in Bentham & J.D. Hooker, 1873
- Genus Neotysonia K.W. Dalla Torre & H.A. Th. Harms, 1905
- Genus Nephrotheca B. Nordenstam & M. Källersjö in B. Nordenstam, 2006
- Genus Nesampelos B. Nordenstam, 2006
- Genus Nesomia B.L. Turner, 1991
- Genus Nesothamnus Rydberg, 1914 accepted as Perityle Bentham, 1844
- Genus Nestlera K.P.J. Sprengel, 1818
- Genus Nestotus R.P. Roberts, L.E. Urbatsch & K.M. Neubig, 2005
- Genus Neuractis Cassini in F. Cuvier, 1825 accepted as Glossocardia Cassini, 1817
- Genus Neurelmis Rafinesque, 1838
- Genus Neurolaena R. Brown, 1817
- Genus Neurolakis Mattfeld, 1924
- Genus Newtonia O. Hoffmann in Engler & Prantl, 1892
- Genus Niclouxia Battandier, 1914
- Genus Nicolasia S.M. Moore, 1900
- Genus Nicolletia A. Gray in Frémont, 1845
- Genus Nidorella Cassini in F. Cuvier, 1825
- Genus Niebuhria Scopoli, 1777
- Genus Niebuhria Necker ex J. Britten, 1901
- Genus Nikitinia M.M. Il'in, 1960 accepted as Klasea Cassini in F. Cuvier, 1825
- Genus Nipponanthemum (S. Kitamura) S. Kitamura, 1978
- Genus Nitelium Cassini in F. Cuvier, 1825
- Genus Nivellea B.H. Wilcox, K. Bremer & C.J. Humphries in K. Bremer & C.J. Humphries, 1993
- Genus Nocca Cavanilles, 1795
- Genus Nolletia Cassini in F. Cuvier, 1825
- Genus Nordenstamia R. Lundin, 2006
- Genus Norlindhia B. Nordenstam, 2006
- Genus Nothites Cassini in F. Cuvier, 1825
- Genus Nothobaccharis R.M. King & H. Robinson, 1979
- Genus Nothocalais (A. Gray) E.L. Greene, 1886
- Genus Nothoschkuhria B.G. Baldwin, 2015
- Genus Nothovernonia H. Robinson & V.A. Funk, 2011
- Genus Noticastrum A.P. de Candolle, 1836
- Genus Notisia P.S. Short, 2016
- Genus Notobasis (Cassini) Cassini in F. Cuvier, 1825
- Genus Notonia A.P. de Candolle, 1833 accepted as Kleinia P. Miller, 1754
- Genus Notoniopsis B. Nordenstam, 1978 accepted as Kleinia P. Miller, 1754
- Genus Notoptera Urban, 1901 accepted as Otopappus Bentham in Bentham & J.D. Hooker, 1873
- Genus Notoseris C. Shih, 1987
- Genus Nouelia Franchet, 1888 accepted as Leucomeris D. Don, 1825
- Genus Novaguinea D.J.N. Hind, 2004
- Genus Novenia S.E. Freire, 1986
- Genus Novopokrovskia N.N. Tzvelev, 1994
- Genus Nuriaea A. Susanna, J.A. Calleja & L.D. Moreyra in Moreyra et al., 2023
- Genus Oaxacania B.L. Robinson & Greenman, 1895 accepted as Hofmeisteria Walpers, 1846
- Genus Obaejaca Cassini in F. Cuvier, 1825
- Genus Obeliscaria Cassini in F. Cuvier, 1825
- Genus Obeliscotheca Adanson, 1763
- Genus Obelisteca Rafinesque, 1817
- Genus Oblivia J.L. Strother, 1989
- Genus Ochrocephala M. Dittrich, 1983
- Genus Ochronelis Rafinesque, 1832
- Genus Oclemena E.L. Greene, 1903
- Genus Ocneron Rafinesque, 1838
- Genus Ocyroe R.A. Philippi, 1891 accepted as Nardophyllum (W.J. Hooker & Arnott) W.J. Hooker & Arnott in W.J. Hooker, 1836
- Genus Ocyroë R.A. Philippi, 1891 represented as Ocyroe R.A. Philippi, 1891
- Genus Odixia A.E. Orchard, 1982
- Genus Odoglossa Rafinesque, 1837
- Genus Odontocarpha Poeppig ex A.P. de Candolle, 1836
- Genus Odontocline B. Nordenstam, 1978
- Genus Odontoloma Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Odontolophus Cassini in F. Cuvier, 1827
- Genus Odontophyllum (Lessing) Spach, 1841
- Genus Odontoptera Cassini in F. Cuvier, 1825
- Genus Odontospermum Necker ex C.H. Schultz-Bipontinus, 1844 accepted as Asteriscus P. Miller, 1754
- Genus Odontotrichum Zuccarini, 1832 accepted as Psacalium Cassini in F. Cuvier, 1826
- Genus Oedera Linnaeus, 1771
- Genus Ogcerostylis Cassini in F. Cuvier, 1827
- Genus Ogiera Cassini, 1818
- Genus Oglifa (Cassini) Cassini in F. Cuvier, 1822
- Genus Oiospermum Lessing, 1829
- Genus Okia H.E. Robinson & J.J. Skvarla, 2010
- Genus Oldenburgia Lessing, 1830
- Genus Oldfeltia B. Nordenstam & R. Lundin, 2002
- Genus Olearia Moench, 1802
- Genus Olgaea Iljin, 1922
- Genus Oligactis (Kunth) Cassini in F. Cuvier, 1825
- Genus Oligactis Rafinesque, 1837
- Genus Oligandra Lessing, 1832 accepted as Lucilia Cassini, 1817
- Genus Oliganthes Cassini, 1817
- Genus Oligocarpha Cassini, 1817
- Genus Oligocarpus Lessing, 1832
- Genus Oligochaeta (A.P. de Candolle) K.H.E. Koch, 1843
- Genus Oligodora A.P. de Candolle, 1838
- Genus Oligodorella Turczaninow, 1851
- Genus Oligoglossa A.P. de Candolle, 1838
- Genus Oligogyne A.P. de Candolle, 1836
- Genus Oligonema S. Watson, 1891
- Genus Oligoneuron J.K. Small, 1903
- Genus Oligosporus Cassini, 1817 accepted as Artemisia Linnaeus, 1753
- Genus Oligothrix A.P. de Candolle, 1838
- Genus Olivaea Schultz-Bipontinus ex Bentham, 1872
- Genus Omalanthus Lessing, 1832
- Genus Omalocline Cassini in F. Cuvier, 1827
- Genus Omalotes A.P. de Candolle, 1838
- Genus Omalotheca Cassini in F. Cuvier, 1828
- Genus Omphalopappus O. Hoffmann in Engler & Prantl, 1891
- Genus Oncosiphon M. Källersjö, 1988
- Genus Ondetia Bentham, 1872
- Genus Onobroma A.P. de Candolle, 1838
- Genus Onobroma J. Gaertner, 1791
- Genus Onopordum Linnaeus, 1753
- Genus Onopyxus P. Bubani, 1899
- Genus Onoseris Willdenow, 1803
- Genus Onotrophe Cassini in F. Cuvier, 1825
- Genus Oocephala (S.B. Jones) H.E. Robinson, 1999
- Genus Ooclinium A.P. de Candolle, 1836
- Genus Oonopsis (T. Nuttall) E.L. Greene, 1896
- Genus Oparanthus Sherff, 1937 accepted as Bidens Linnaeus, 1753
- Genus Ophryosporus Meyen, 1834
- Genus Opicrina Rafinesque, 1838
- Genus Opisthopappus C. Shih, 1979
- Genus Oporinia D. Don, 1829
- Genus Orbivestus H.E. Robinson, 1999
- Genus Orcya Vellozo, 1829
- Genus Oreastrum E.L. Greene, 1896 accepted as Aster Linnaeus, 1753
- Genus Oreochrysum Rydberg, 1906
- Genus Oreoleysera K. Bremer, 1978
- Genus Oreophila D. Don, 1830
- Genus Oreoseris A.P. de Candolle, 1838
- Genus Oreostemma E.L. Greene, 1900
- Genus Oresbia G.V. Cron & R.B. Nordenstam, 2006
- Genus Orestion Rafinesque, 1837
- Genus Oriastrum Poeppig in Poeppig & Endlicher, 1843
- Genus Oritrophium (Kunth) J. Cuatrecasas, 1961
- Genus Ormenis (Cassini) Cassini in F. Cuvier, 1823 accepted as Chamaemelum P. Miller, 1754
- Genus Orochaenactis Coville, 1893
- Genus Orognaphalon G.L. Nesom, 2024
- Genus Orsina A. Bertoloni, 1830
- Genus Orsinia Bertoloni ex A.P. de Candolle, 1836
- Genus Orthocentron (Cassini) Cassini in F. Cuvier, 1825 accepted as Cirsium P. Miller, 1754
- Genus Orthopappus H.A. Gleason, 1906
- Genus Ortizacalia J.F. Pruski, 2012
- Genus Osbertia E.L. Greene, 1895
- Genus Osmadenia Nuttall, 1841
- Genus Osmia C.H. Schultz-Bipontinus, 1866
- Genus Osmiopsis R.M. King & H.E. Robinson, 1975
- Genus Osmites Linnaeus, 1763 accepted as Relhania L'Héritier de Brutelle, 1789
- Genus Osmitopsis Cassini, 1817
- Genus Osteospermum Linnaeus, 1753
- Genus Oswalda Cassini in F. Cuvier, 1829
- Genus Otanthus Hoffmannsegg & Link, 1809
- Genus Oteiza La Llave, 1832
- Genus Othake Rafinesque, 1838
- Genus Othonna Linnaeus, 1753
- Genus Othonnopsis Jaubert & Spach, 1852 accepted as Othonna Linnaeus, 1753
- Genus Otocarpum H.M. Willkomm, 1892
- Genus Otochlamys A.P. de Candolle, 1838
- Genus Otoglyphis Pomel, 1874
- Genus Otopappus Bentham in Bentham & J.D. Hooker, 1873
- Genus Otospermum M. Willkomm, 1864
- Genus Outreya Jaubert & Spach, 1843 accepted as Jurinea Cassini, 1821
- Genus Ovicula Manley, 2025
- Genus Oxycarpha S.F. Blake, 1918
- Genus Oxydon Lessing, 1830
- Genus Oxylaena Bentham ex A.A. Anderberg, 1991
- Genus Oxylepis Bentham, 1841
- Genus Oxylobus (A.P. de Candolle) A. Gray, 1880
- Genus Oxypappus Bentham, 1845
- Genus Oxyphyllum R. Philippi, 1860
- Genus Oxytenia Nuttall, 1848
- Genus Oxyura A.P. de Candolle, 1836
- Genus Oyedaea A.P. de Candolle, 1836
- Genus Ozothamnus R. Brown, 1817
- Genus Pachyderis Cassini in F. Cuvier, 1828
- Genus Pachylaena D. Don ex W.J. Hooker & Arnott in W.J. Hooker, 1835
- Genus Pachylepis Lessing, 1832
- Genus Pachyrhynchus A.P. de Candolle, 1838 accepted as Lucilia Cassini, 1817
- Genus Pachystegia Cheeseman, 1925
- Genus Pachysurus Steetz in J.G.C. Lehmann, 1845
- Genus Pachythamnus (R.M. King & H.E. Robinson) R.M. King & H.E. Robinson, 1972
- Genus Pachythelia J. Steetz in W. Peters, 1864
- Genus Pacifigeron G.L. Nesom, 1994
- Genus Packera Á. Löve & D. Löve, 1976
- Genus Pacourina Aublet, 1775
- Genus Pacourinopsis Cassini, 1817
- Genus Paenula A.E. Orchard, 2005
- Genus Palaeocyanus J. Dostál, 1976 accepted as Cheirolophus Cassini in F. Cuvier, 1827
- Genus Palafoxia Lagasca, 1816
- Genus Paleaepappus Cabrera, 1969 accepted as Nardophyllum (W.J. Hooker & Arnott) W.J. Hooker & Arnott in W.J. Hooker, 1836
- Genus Paleista Rafinesque, 1837
- Genus Palenia R.A. Philippi, 1895
- Genus Paleolaria Cassini, 1816
- Genus Paleya Cassini in F. Cuvier, 1826
- Genus Pallasia L'Héritier ex W. Aiton, 1789
- Genus Pallenis (Cassini) Cassini in F. Cuvier, 1822
- Genus Pamphalea A.P. de Candolle, 1812 accepted as Panphalea Lagasca, 1811
- Genus Panaetia Cassini, 1829
- Genus Panargyrus Lagasca, 1811
- Genus Paneroa E.E. Schilling, 2008
- Genus Paniopsis Rafinesque, 1837
- Genus Panios Adanson, 1763
- Genus Panphalea Lagasca, 1811
- Genus Pappobolus S.F. Blake, 1916
- Genus Pappochroma Rafinesque, 1837
- Genus Pappothrix (A. Gray) Rydberg, 1914 accepted as Perityle Bentham, 1844
- Genus Papuacalia J.F. Veldkamp, 1991
- Genus Paquerina Cassini in F. Cuvier, 1825
- Genus Paquirea J.L. Panero & S.E. Freire, 2013
- Genus Paracalia Cuatrecasas, 1960
- Genus Parachionolaena M.O. Dillon & A. Sagástegui-Alva, 1991 accepted as Chionolaena A.P. de Candolle, 1836
- Genus Parafaujasia C. Jeffrey, 1992
- Genus Paragynoxys (Cuatrecasas) Cuatrecasas, 1955
- Genus Paraixeris Nakai, 1920 accepted as Crepidiastrum Nakai, 1920
- Genus Paralychnophora N.F.F. MacLeish, 1984 accepted as Eremanthus Lessing, 1829
- Genus Paramicrorhynchus M.E. Kirpicznikov in E.G. Bobrov & N.N. Tzvelev, 1964
- Genus Paramiflos J. Cuatrecasas, 1995
- Genus Paranephelius Poeppig in Poeppig & Endlicher, 1843
- Genus Parantennaria Beauverd, 1911
- Genus Paraphysis (A.P. de Candolle) J. Dostál, 1973 accepted as Centaurea Linnaeus, 1753
- Genus Parapiqueria R.M. King & H.E. Robinson, 1980
- Genus Parapolydora H.E. Robinson, 2005
- Genus Paraprenanthes C.C. Chang ex C. Shih, 1988 accepted as Lactuca Linnaeus, 1753
- Genus Parasenaria J.M.H. Shaw, 2008 accepted as Liguparasenecio H. Ohashi & K. Ohashi, 2008
- Genus Parasenecio W.W. Smith & J.K. Small, 1922
- Genus Parastrephia Nuttall, 1841
- Genus Parasyncalathium J.-W. Zhang, E. Boufford & H. Sun, 2011
- Genus Pardisium N.L. Burman, 1768
- Genus Partheniastrum Fabricius, 1759
- Genus Parthenice A. Gray, 1853
- Genus Parthenites G. Saporta, 1862 †
- Genus Parthenium Linnaeus, 1753
- Genus Parthenopsis Kellogg, 1873
- Genus Pasaccardoa O. Kuntze, 1891
- Genus Pascalia Ortega, 1797
- Genus Pascalium A.H.G. de Cassini accepted as Psacalium Cassini in F. Cuvier, 1826
- Genus Paua Caballero, 1916 accepted as Andryala Linnaeus, 1753
- Genus Paurolepis S.M. Moore, 1917
- Genus Pechuelloeschea O. Hoffmann, 1888 accepted as Pechuel-Loeschea O. Hoffmann, 1888
- Genus Pechuel-Loeschea O. Hoffmann, 1888
- Genus Pectidium Lessing, 1831
- Genus Pectidopsis A.P. de Candolle, 1836
- Genus Pectinastrum Cassini in F. Cuvier, 1826
- Genus Pectis Linnaeus, 1759
- Genus Pegolettia Cassini in F. Cuvier, 1825
- Genus Peltidium Zollikofer, 1820
- Genus Pelucha S. Watson, 1889
- Genus Pembertonia P.S. Short, 2004
- Genus Pentacalia Cassini in F. Cuvier, 1827
- Genus Pentachaeta Nuttall, 1840
- Genus Pentalepis F. von Mueller, 1863
- Genus Pentanema Cassini, 1818
- Genus Pentanthus Lessing, 1832
- Genus Pentanthus W.J. Hooker & Arnott, 1835
- Genus Pentaphorus D. Don, 1830 accepted as Gochnatia Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Pentataxis D. Don, 1826
- Genus Pentatrichia Klatt, 1895
- Genus Penthea (D. Don) Spach, 1841
- Genus Pentheriella O. Hoffmann & R. Muschler, 1910-1911 accepted as Heteromma Bentham in Bentham & J.D. Hooker, 1873
- Genus Pentzia Thunberg, 1800
- Genus Peramibus Rafinesque, 1820
- Genus Perdicium Linnaeus, 1760
- Genus Pereuphora Hoffmannsegg, 1826
- Genus Perezia Lagasca, 1811
- Genus Pereziopsis J.M. Coulter, 1895
- Genus Pericalia Cassini in F. Cuvier, 1827 accepted as Roldana La Llave in La Llave & Lexarza, 1825
- Genus Pericallis D. Don in R. Sweet, 1834
- Genus Pericome A. Gray, 1853
- Genus Perideraea P.B. Webb, 1838
- Genus Peripleura (N.T. Burbidge) G.L. Nesom, 1994
- Genus Peritris Rafinesque, 1837
- Genus Perityle Bentham, 1844
- Genus Perotriche Cassini, 1818
- Genus Perplexia M.M. Iljin in B.K. Schischkin & E.G. Bobrov, 1962 accepted as Jurinella Jaubert & Spach, 1846
- Genus Perralderia Cosson, 1859
- Genus Perralderiopsis S. Rauschert, 1982 accepted as Iphiona Cassini, 1817
- Genus Personaria Lamarck, 1797
- Genus Persoonia A. Michaux, 1803
- Genus Pertya C.H. Schultz-Bipontinus, 1862
- Genus Perymeniopsis H. Robinson, 1978
- Genus Perymenium H.A. Schrader, 1830
- Genus Petalacte D. Don, 1826
- Genus Petalactella N.E. Brown, 1894
- Genus Petalolepis Cassini, 1817
- Genus Petasites P. Miller, 1754
- Genus Peteravenia R.M. King & H.E. Robinson, 1971
- Genus Petradoria E.L. Greene, 1895
- Genus Petrobium R. Brown, 1817 accepted as Bidens Linnaeus, 1753
- Genus Petrodavisia J. Holub, 1975 accepted as Centaurea Linnaeus, 1753
- Genus Petrollinia Chiovenda, 1911
- Genus Peucephyllum A. Gray in Torrey, 1859
- Genus Peyrousea A.P. de Candolle in Lindley, 1836
- Genus Peyrousea A.P. de Candolle, 1838 accepted as Schistostephium Lessing, 1832
- Genus Phacellothrix F. von Mueller, 1878
- Genus Phaecasium Cassini in F. Cuvier, 1826
- Genus Phaenixopus Cassini in F. Cuvier, 1826 accepted as Lactuca Linnaeus, 1753
- Genus Phaenocoma D. Don, 1826
- Genus Phaenopoda Cassini in F. Cuvier, 1826
- Genus Phaenopus A.P. de Candolle, 1838 accepted as Lactuca Linnaeus, 1753
- Genus Phaeocephalus S.M. Moore, 1900 accepted as Hymenolepis Cassini, 1817
- Genus Phaeoleuca F. von Mueller, 1853
- Genus Phaeopappus (A.P. de Candolle) Boissier, 1846 accepted as Centaurea Linnaeus, 1753
- Genus Phaeostigma A.A. Muldashev, 1981
- Genus Phaethusa J. Gaertner, 1791
- Genus Phagnalon Cassini, 1819
- Genus Phalacrachena Iljin, 1937
- Genus Phalacraea A.P. de Candolle, 1836
- Genus Phalacrocarpum (A.P. de Candolle) Willkomm, 1864
- Genus Phalacroderis A.P. de Candolle, 1838 accepted as Crepis Linnaeus, 1753
- Genus Phalacrodiscus Lessing, 1832
- Genus Phalacroloma Cassini in F. Cuvier, 1826
- Genus Phalacromesus Cassini in F. Cuvier, 1828
- Genus Phalacroseris A. Gray, 1868
- Genus Phalolepis Cassini in F. Cuvier, 1827
- Genus Phaneroglossa B. Nordenstam, 1978
- Genus Phanerostylis (A. Gray) R.M. King & H.E. Robinson, 1972 accepted as Brickellia S. Elliott, 1823
- Genus Phania A.P. de Candolle, 1836
- Genus Pharetranthus Klatt, 1885
- Genus Phaseolaria G.L. Nesom, 2020 accepted as Phaseolaster G.L. Nesom, 2020
- Genus Phaseolaster G.L. Nesom, 2020
- Genus Phialis K.P.J. Sprengel, 1831
- Genus Philactis Schrader, 1833
- Genus Phileozera Buckley, 1861
- Genus Philoglossa A.P. de Candolle, 1836
- Genus Philostizus Cassini in F. Cuvier, 1826
- Genus Philyrophyllum O. Hoffmann in Engler & Prantl, 1890
- Genus Phitosia G. Kamari & W.R. Greuter, 2000
- Genus Phoebanthus S.F. Blake, 1916
- Genus Phoenicoseris (C. Skottsberg) C. Skottsberg, 1951 accepted as Dendroseris D. Don, 1832
- Genus Phoenixopus H.G.L. Reichenbach, 1829
- Genus Phonus J. Hill, 1762 accepted as Carthamus Linnaeus, 1753
- Genus Phrygia (Persoon) S.F. Gray, 1821
- Genus Phylactis H.A. Schrader, 1831
- Genus Phyllactinia Bentham in Bentham & J.D. Hooker, 1873
- Genus Phyllocalymma Bentham in Endlicher et al., 1837
- Genus Phyllocephalum Blume, 1826
- Genus Phyllochilium Cabrera, 1937
- Genus Phyllopappus Walpers, 1841
- Genus Phyllostelidium Beauverd, 1916
- Genus Phymaspermum Lessing, 1832
- Genus Phyteumopsis A.L. Jussieu ex Poiret in Lamarck, 1816
- Genus Picnomon Adanson, 1763
- Genus Picradenia W.J. Hooker, 1833 accepted as Hymenoxys Cassini in F. Cuvier, 1828
- Genus Picradeniopsis Rydberg ex N.L. Britton, 1901
- Genus Picridium Desfontaines, 1799 accepted as Reichardia A.W. Roth, 1787
- Genus Picris Linnaeus, 1753
- Genus Picrosia D. Don, 1830
- Genus Picrothamnus Nuttall, 1841
- Genus Pietrosia Nyár, 1963
- Genus Piknomon Adanson, 1763
- Genus Pilbara N.S. Lander, 2013
- Genus Pilosella J. Hill, 1756 accepted as Hieracium Linnaeus, 1753
- Genus Piloselloides (C.F. Lessing) C. Jeffrey ex G. Cufodontis, 1967 accepted as Gerbera Linnaeus, 1758
- Genus Pilostemon Iljin, 1961
- Genus Pinardia Cassini in F. Cuvier, 1826
- Genus Pinaropappus Lessing, 1832
- Genus Pingraea Cassini in F. Cuvier, 1826 accepted as Baccharis Linnaeus, 1753
- Genus Pinillosia Ossa in A.P. de Candolle, 1836
- Genus Piofontia Cuatrecasas, 1943
- Genus Pionocarpus S.F. Blake, 1916 accepted as Iostephane Bentham in Bentham & J.D. Hooker, 1873
- Genus Piora J.T. Koster, 1966
- Genus Pippenalia R. McVaugh, 1972
- Genus Piptocarpha R. Brown, 1817
- Genus Piptocarpha W.J. Hooker & Arnott, 1835
- Genus Piptocephalum C.H. Schultz-Bipontinus, 1860
- Genus Piptoceras Cassini in F. Cuvier, 1829
- Genus Piptocoma Cassini, 1817
- Genus Piptolepis C.H. Schultz-Bipontinus, 1863
- Genus Piptopogon Cassini in F. Cuvier, 1827
- Genus Piptostemma (D. Don) Spach, 1841
- Genus Piptostemma Turczaninow, 1851
- Genus Piptothrix A. Gray, 1886
- Genus Piqueria Cavanilles, 1795
- Genus Piqueriella R.M. King & H. Robinson, 1974
- Genus Piqueriopsis R.M. King, 1965
- Genus Pirarda Adanson, 1763
- Genus Pithecoseris C.F.P. Martius ex A.P. de Candolle, 1836
- Genus Pithocarpa Lindley, 1839
- Genus Pithosillum Cassini in F. Cuvier, 1826 accepted as Emilia Cassini, 1817
- Genus Pittocaulon H.E. Robinson & R.D. Brettell, 1973
- Genus Pityopsis Nuttall, 1840
- Genus Placus Loureiro, 1790 accepted as Blumea A.P. de Candolle, 1833
- Genus Pladaroxylon (Endlicher) J.D. Hooker, 1870
- Genus Plagiobasis A.G. Schrenk, 1845
- Genus Plagiocheilus Arnott ex A.P. de Candolle, 1838
- Genus Plagiolophus Greenman, 1904
- Genus Plagius L'Héritier ex A.P. de Candolle, 1838
- Genus Planaltoa Taubert, 1895
- Genus Planea P.O. Karis, 1990
- Genus Plateilema (A. Gray) Cockerell, 1904
- Genus Platycarpha Lessing, 1831
- Genus Platycarphella V.A. Funk & H.E. Robinson, 2009
- Genus Platychaete Boissier, 1849 accepted as Pulicaria J. Gaertner, 1791
- Genus Platycheilis Cassini in F. Cuvier, 1825
- Genus Platylophus Cassini in F. Cuvier, 1826
- Genus Platypodanthera R.M. King & H.E. Robinson, 1972
- Genus Platypteris Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Platyraphium Cassini in F. Cuvier, 1825
- Genus Platyschkuhria (A. Gray) Rydberg, 1906
- Genus Platystephium Gardner in W.J. Hooker, 1848
- Genus Plazia Ruiz & Pavon, 1794
- Genus Plecostachys O.M. Hilliard & B.L. Burtt, 1981
- Genus Plectocephalus D. Don in Sweet, 1830
- Genus Plectreca Rafinesque, 1838
- Genus Pleiacanthus (W.J. Hooker ex T. Nuttall) Rydberg, 1917
- Genus Pleiogyne K.H.E. Koch, 1843
- Genus Pleiotaxis Steetz in Peters, 1864
- Genus Pleocarphus D. Don, 1830
- Genus Pleucephyllum accepted as Peucephyllum A. Gray in Torrey, 1859
- Genus Pleurocarpaea Bentham, 1867
- Genus Pleurocornis accepted as Pleurocoronis R.M. King & H.E. Robinson, 1966
- Genus Pleurocoronis R.M. King & H.E. Robinson, 1966
- Genus Pleuropappus F. von Mueller, 1855 accepted as Angianthus J.C. Wendland, 1808 (?)
- Genus Pleurophyllum J.D. Hooker, 1844
- Genus Pluchea Cassini, 1817
- Genus Plummera A. Gray, 1882 accepted as Hymenoxys Cassini in F. Cuvier, 1828
- Genus Plumosipappus S.K. Czerepanov, 1960
- Genus Podachaenium Bentham ex Oersted, 1852
- Genus Podanthus Lagasca, 1816
- Genus Podocalea J.F. Pruski, 2023
- Genus Podocoma R. Brown, 1849
- Genus Podocoma Cassini, 1817
- Genus Podolepis Labillardière, 1806
- Genus Podopappus W.J. Hooker & Arnott in W.J. Hooker, 1836
- Genus Podophania Baillon, 1880 accepted as Hofmeisteria Walpers, 1846
- Genus Podosperma Labillardière, 1806
- Genus Podospermum A.P. de Candolle in Lamarck & A.P. de Candolle, 1805 accepted as Scorzonera Linnaeus, 1753
- Genus Podotheca Cassini in F. Cuvier, 1822
- Genus Poecilolepis J. Grau, 1977
- Genus Poecilotriche J. Dulac, 1867
- Genus Pogonolepis Steetz in J.G.C. Lehmann, 1845
- Genus Poilania Gagnepain, 1924
- Genus Pojarkovia R.K. Askerova, 1984
- Genus Poljakanthema R.V. Kamelin in T.A. Adylov & T.I. Zuckerwanik, 1993
- Genus Poljakovia V.I. Grubov & N.S. Filatova, 2001
- Genus Pollalesta Kunth in Humboldt, Bonpland & Kunth, 1818 accepted as Piptocoma Cassini, 1817
- Genus Poloa A.P. de Candolle, 1833
- Genus Polyacantha S.F. Gray, 1821
- Genus Polyachyrus Lagasca, 1811
- Genus Polyactidium A.P. de Candolle, 1836
- Genus Polyactis Lessing, 1832
- Genus Polyanthina R.M. King & H.E. Robinson, 1970
- Genus Polyarrhena Cassini in F. Cuvier, 1828
- Genus Polycalymma F. von Mueller & Sonder, 1853
- Genus Polycantha J. Hill, 1762
- Genus Polycephalos Forsskål, 1775
- Genus Polychaetia Lessing, 1832 accepted as Nestlera K.P.J. Sprengel, 1818
- Genus Polychrysum (N.N. Tzvelev) S.S. Kovalevskaja, 1962
- Genus Polyclados Philippi, 1860
- Genus Polycline D. Oliver, 1894
- Genus Polydora E. Fenzl, 1844
- Genus Polygyne R.A. Philippi, 1864
- Genus Polymnia Linnaeus, 1753
- Genus Polymniastrum Lamarck, 1823
- Genus Polypappus Lessing, 1831 accepted as Baccharis Linnaeus, 1753
- Genus Polypteris Nuttall, 1818 accepted as Palafoxia Lagasca, 1816
- Genus Polytaxis A. Bunge, 1843
- Genus Ponaea Bubani, 1899
- Genus Pontesia Vellozo, 1835
- Genus Pontia P. Bubani, 1899
- Genus Porcellites Cassini in F. Cuvier, 1822 accepted as Hypochaeris Linnaeus, 1753
- Genus Porophyllum Guettard, 1754
- Genus Porophyllum M. Adanson, 1763
- Genus Porphyrostemma Grant ex Bentham & J.D. Hooker, 1873
- Genus Portalesia Meyen, 1834
- Genus Postia E.P. Boissier & E. Blanche in E.P. Boissier, 1875 accepted as Rhanteriopsis S. Rauschert, 1982
- Genus Praxeliopsis G.M. Barroso, 1949
- Genus Praxelis Cassini in F. Cuvier, 1826
- Genus Preauxia C.H. Schultz-Bipontinus in P.B. Webb & S. Berthelot, 1844
- Genus Prenanthella Rydberg, 1906
- Genus Prenanthenia Sventenius, 1960
- Genus Prenanthes Linnaeus, 1753
- Genus Prestelia C.H. Schultz-Bipontinus, 1865(?)
- Genus Printzia Cassini in F. Cuvier, 1825
- Genus Prionanthes Schrank, 1820
- Genus Prionolepis Poeppig in Poeppig & Endlicher, 1845
- Genus Prionopsis Nuttall, 1840 accepted as Grindelia Willdenow, 1807
- Genus Prolobus R.M. King & H.E. Robinson, 1982
- Genus Prolongoa Boissier, 1840
- Genus Pronacron Cassini in F. Cuvier, 1826
- Genus Proselia D. Don, 1830
- Genus Proteopsis C.F.P. Martius & Zuccarini ex C.H. Schultz-Bipontinus, 1863
- Genus Proustia Lagasca, 1811
- Genus Psacaliopsis H.E. Robinson & R.D. Brettell, 1974
- Genus Psacalium Cassini in F. Cuvier, 1826
- Genus Psammoseris Boissier & Reuter, 1849
- Genus Psanacetum (Necker ex Lessing) E. Spach, 1841
- Genus Psathurochaeta A.P. de Candolle, 1836
- Genus Psathyrotes A. Gray, 1853
- Genus Psathyrotopsis Rydberg, 1927
- Genus Psednotrichia Hiern, 1898
- Genus Psephellus Cassini in F. Cuvier, 1826
- Genus Pseudactis S.M. Moore, 1919 accepted as Emilia Cassini, 1817
- Genus Pseudelephantopus Rohr, 1792
- Genus Pseudoagarista Mesfin Tadesse & D.J. Crawford, 2023 accepted as Epilepis Bentham, 1839
- Genus Pseudobaccharis A.L. Cabrera, 1944 accepted as Baccharis Linnaeus, 1753
- Genus Pseudobahia (A. Gray) Rydberg, 1915
- Genus Pseudobartlettia Rydberg, 1927 accepted as Psathyrotes A. Gray, 1853
- Genus Pseudoblepharispermum J.-P. Lebrun & A.L. Stork in J.-P. Lebrun, A.L. Stork & J. Wuest, 1982
- Genus Pseudobrickellia R.M. King & H.E. Robinson, 1972
- Genus Pseudocadiscus S. Lisowski, 1987
- Genus Pseudoclappia Rydberg, 1923
- Genus Pseudoclinium O. Kuntze in T. Post & O. Kuntze, 1903
- Genus Pseudoconyza J. Cuatrecasas, 1961
- Genus Pseudocrupina J. Velenovský, 1923
- Genus Pseudoelephantopus Rohr, 1792 accepted as Pseudelephantopus Rohr, 1792
- Genus Pseudo-Elephantopus Rohr, 1792 accepted as Pseudelephantopus Rohr, 1792
- Genus Pseudoglossanthis Poljakov, 1967
- Genus Pseudognaphalium M.E. Kirpicznikov in M.E. Kirpicznikov & L.A. Kuprijanova, 1950
- Genus Pseudogynoxys (Greenman) Cabrera, 1950
- Genus Pseudohandelia N.N. Tzvelev in B.K. Schischkin & E.G. Bobrov, 1961
- Genus Pseudojacobaea (J.D. Hooker) R. Mathur, 1988 accepted as Senecio Linnaeus, 1753
- Genus Pseudokyrsteniopsis R.M. King & H.E. Robinson, 1973
- Genus Pseudoligandra M.O. Dillon & A. Sagástegui, 1990 accepted as Chionolaena A.P. de Candolle, 1836
- Genus Pseudolinosyris Novopokrovsky, 1918
- Genus Pseudonoseris H.E. Robinson & R.D. Brettell, 1974
- Genus Pseudopegolettia H. Robinson, J. Skvarla & V.A. Funk, 2016
- Genus Pseudopiptocarpha H.E. Robinson, 1994
- Genus Pseudopodospermum (S.J. Lipschitz & I.M. Krascheninnikov) S.I. Kuthatheladze, 1978
- Genus Pseudoseris Baillon, 1881
- Genus Pseudostifftia H.E. Robinson, 1979
- Genus Pseudoyoungia D. Maity & G.G. Maiti, 2010
- Genus Psiadia N.J. Jacquin ex Willdenow, 1803
- Genus Psiadiella Humbert, 1923
- Genus Psila R.A. Philippi, 1891 accepted as Baccharis Linnaeus, 1753
- Genus Psilactis A. Gray, 1849
- Genus Psilocarphus Nuttall, 1840
- Genus Psilochenia Nuttall, 1841
- Genus Psilopogon R.A. Philippi, 1863
- Genus Psilostrophe A.P. de Candolle, 1838
- Genus Psilothamnus A.P. de Candolle, 1838
- Genus Psilothonna (E.H.F. Meyer ex A.P. de Candolle) E.P. Phillips, 1950
- Genus Psora J. Hill, 1762 accepted as Centaurea Linnaeus, 1753
- Genus Psychrogeton Boissier, 1875
- Genus Psychrophyton Beauverd, 1910
- Genus Ptarmica P. Miller, 1754
- Genus Pterachaenia (Bentham & J.D. Hooker) S.J. Lipschitz, 1971
- Genus Pterigeron (A.P. de Candolle) Bentham, 1867 accepted as Streptoglossa Steetz ex F. von Mueller, 1863
- Genus Pternix Rafinesque, 1817
- Genus Pternix J. Hill, 1762
- Genus Pterocaulon S. Elliott, 1823
- Genus Pterochaeta Steetz in J.G.C. Lehmann, 1845
- Genus Pterochaete Boissier, 1846
- Genus Pterocypsela C. Shih, 1988 accepted as Lactuca Linnaeus, 1753
- Genus Pterolophus Cassini in F. Cuvier, 1826
- Genus Pteronia Linnaeus, 1763
- Genus Pterophora Linnaeus, 1760
- Genus Pterophorus Boehmer in Ludwig, 1760 accepted as Pteronia Linnaeus, 1763
- Genus Pterophyton Cassini, 1818
- Genus Pteropogon A.P. de Candolle, 1838 accepted as Rhodanthe Lindley, 1834
- Genus Pterostephanus Kellogg, 1863
- Genus Pterotheca Cassini, 1816
- Genus Pterothrix A.P. de Candolle, 1838 accepted as Amphiglossa A.P. de Candolle, 1838
- Genus Pterygopappus J.D. Hooker, 1874
- Genus Ptilepida Rafinesque, 1818 accepted as Helenium Linnaeus, 1753
- Genus Ptilocalais J. Torrey ex E.L. Greene, 1886 accepted as Microseris D. Don, 1832
- Genus Ptilomeris Nuttall, 1841
- Genus Ptilonella Nuttall, 1841
- Genus Ptilophora (Torrey & A. Gray ex W.J. Hooker) A. Gray, 1849
- Genus Ptiloria Rafinesque, 1832 accepted as Stephanomeria Nuttall, 1841
- Genus Ptilostemon Cassini, 1816
- Genus Ptilostephium Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Ptilurus D. Don, 1830
- Genus Ptosimopappus Boissier, 1845
- Genus Pugiopappus A. Gray in Torrey, 1857 accepted as Coreopsis Linnaeus, 1753
- Genus Pulicaria J. Gaertner, 1791
- Genus Pulicarioidea S. Bunwong, P. Chantaranothai & S.C. Keeley, 2014
- Genus Pumilo Schlechtendal, 1848
- Genus Punduana Steetz in Peters, 1864
- Genus Pycnocephalum (Lessing) A.P. de Candolle, 1836 accepted as Chresta Vellozo ex A.P. de Candolle, 1836
- Genus Pycnocomus J. Hill, 1762
- Genus Pycnosorus Bentham in Endlicher et al., 1837
- Genus Pyrarda Cassini in F. Cuvier, 1826
- Genus Pyrethropsis B.H. Wilcox, K. Bremer & C.J. Humphries, MS? accepted as Rhodanthemum B.H. Wilcox, K. Bremer & C.J. Humphries in K. Bremer & C.J. Humphries, 1993
- Genus Pyrethrum Medikus, 1775 accepted as Tanacetum Linnaeus, 1753
- Genus Pyrethrum Zinn, 1757 accepted as Tanacetum Linnaeus, 1753
- Genus Pyrethum Zinn, 1757
- Genus Pyretrum J. Burman in Plumier, 1760
- Genus Pyrrhopappus A.P. de Candolle, 1838
- Genus Pyrrocoma W.J. Hooker, 1833
- Genus Pytinicarpa G.L. Nesom, 1994
- Genus Qineryangia Y.-S. Chen & L.-S. Xu in Xu et al., 2024
- Genus Quadribractea A.E. Orchard, 2013
- Genus Quasiantennaria R.J. Bayer & M.O. Dillon, 2019
- Genus Quechualia H.E. Robinson, 1993
- Genus Quelchia N.E. Brown, 1901
- Genus Quinetia Cassini in F. Cuvier, 1830
- Genus Quinqueremulus Paul G. Wilson, 1987
- Genus Rachelia J.M. Ward & I. Breitwieser, 1997
- Genus Radlkoferotoma O. Kuntze, 1891
- Genus Rafinesquia Nuttall, 1841
- Genus Raillardella (A. Gray) Bentham & J.D. Hooker, 1873
- Genus Raillardia accepted as Dubautia Gaudichaud-Beaupré in Freycinet, 1830
- Genus Raillardiopsis Rydberg, 1927 accepted as Anisocarpus Nuttall, 1841
- Genus Railliardia Gaudichaud-Beaupré in Freycinet, 1830 accepted as Dubautia Gaudichaud-Beaupré in Freycinet, 1830
- Genus Railliautia Sherff, 1935 accepted as Dubautia Gaudichaud-Beaupré in Freycinet, 1830
- Genus Rainiera E.L. Greene, 1898
- Genus Ramaliella M.A. Zaika, A.P. Sukhorukov & N. Kilian, 2020
- Genus Ramtilla A.P. de Candolle, 1833
- Genus Rancagua Poeppig & Endlicher, 1835
- Genus Raoulia J.D. Hooker ex Raoul, 1846
- Genus Raouliopsis S.F. Blake, 1938
- Genus Rastrophyllum H. Wild & G.V. Pope, 1977
- Genus Ratibida Rafinesque, 1817
- Genus Raulinoreitzia R.M. King & H.E. Robinson, 1971
- Genus Rayjacksonia R.L. Hartman & M.A. Lane in M.A. Lane & R.L. Hartman, 1996
- Genus Razumovia K.P.J. Sprengel ex A.L. Jussieu in F. Cuvier, 1826
- Genus Rea Bertero ex Decaisne, 1833 accepted as Dendroseris D. Don, 1832
- Genus Reichardia A.W. Roth, 1787
- Genus Relhania L'Héritier de Brutelle, 1789
- Genus Remya W. Hillebrand ex Bentham & J.D. Hooker, 1873
- Genus Rennera Merxmueller, 1957
- Genus Rensonia S.F. Blake, 1923
- Genus Resinocaulon Lunell, 1917
- Genus Revealia R.M. King & H. Robinson, 1976 accepted as Carphochaete A. Gray, 1849
- Genus Rhabdotheca Cassini in F. Cuvier, 1827
- Genus Rhacoma Adanson, 1763 accepted as Chartolepis Cassini in F. Cuvier, 1826
- Genus Rhagadiolus S. Vaillant, 1754
- Genus Rhagadiolus Zinn, 1757
- Genus Rhagadiolus J.P. de Tournefort ex J.A. Scopoli, 1777
- Genus Rhagadiolus J.A. Scopoli, 1754
- Genus Rhamphogyne S.M. Moore, 1914
- Genus Rhanteriopsis S. Rauschert, 1982
- Genus Rhanterium Desfontaines, 1799
- Genus Rhapontica J. Hill, 1762
- Genus Rhaponticoides S. Vaillant, 1754
- Genus Rhaponticum S. Vaillant, 1754
- Genus Rhaponticum A. von Haller, 1742
- Genus Rhaponticum M. Adanson, 1763
- Genus Rhaponticum Ludwig, 1757 accepted as Rhaponticum S. Vaillant, 1754
- Genus Rhetinocarpha P G. Wilson & M.A. Wilson, 2006
- Genus Rhetinodendron C.F. Meisner, 1839 accepted as Senecio Linnaeus, 1753
- Genus Rhetinolepis Cosson, 1856
- Genus Rhigiothamnus (Lessing) Spach, 1841
- Genus Rhinactina Willdenow, 1807 accepted as Jungia Linnaeus f., 1782
- Genus Rhinactina Lessing, 1831 accepted as Aster Linnaeus, 1753
- Genus Rhinactinidia Novopokrovskij, 1948 accepted as Aster Linnaeus, 1753
- Genus Rhodactinea G. Gardner, 1847
- Genus Rhodanthe Lindley, 1834
- Genus Rhodanthemum B.H. Wilcox, K. Bremer & C.J. Humphries in K. Bremer & C.J. Humphries, 1993
- Genus Rhodogeron Grisebach, 1866
- Genus Rhodoseris Turczaninow, 1851
- Genus Rhynchocarpus Lessing, 1832
- Genus Rhynchopappus Dulac, 1867
- Genus Rhynchopsidium A.P. de Candolle & Alph. de Candolle, 1836
- Genus Rhynchospermum Reinwardt, 1825
- Genus Rhynea A.P. de Candolle, 1838 accepted as Tenrhynea O.M. Hilliard & B.L. Burtt, 1981
- Genus Rhysolepis S.F. Blake, 1917 accepted as Aldama La Llave in La Llave & Lexarza, 1824
- Genus Rhytidanthe Bentham in Endlicher et al., 1837
- Genus Rhytidospermum C.H. Schultz-Bipontinus in P.B. Webb & S. Berthelot, 1844
- Genus Richea Labillardière, 1800
- Genus Richterago O. Kuntze, 1891
- Genus Richteria Karelin & Kirilov, 1842
- Genus Ridan Adanson, 1763
- Genus Riddellia Nuttall, 1841 accepted as Psilostrophe A.P. de Candolle, 1838
- Genus Riencourtia A.H.G. de Cassini, 1818
- Genus Riencurtia A.H.G. de Cassini, 1818 accepted as Riencourtia A.H.G. de Cassini, 1818
- Genus Rigiopappus A. Gray, 1865
- Genus Robertia A. Richard ex A.P. de Candolle in Lamarck & A.P. de Candolle, 1815 accepted as Hypochaeris Linnaeus, 1753
- Genus Robinsonecio T.M. Barkley & J.P. Janovec, 1996
- Genus Robinsonia A.P. de Candolle, 1833 accepted as Senecio Linnaeus, 1753
- Genus Roccardia Necker ex Rafinesque, 1838
- Genus Roccardia Necker ex Voss in Vilmorin, 1894
- Genus Rochonia A.P. de Candolle, 1836
- Genus Rockhausenia D.J.N.Hind, 2022
- Genus Rodigia K.P.J. Sprengel, 1820
- Genus Roebuckia P.S. Short, 2014 accepted as Roebuckiella P.S. Short, 2015
- Genus Roebuckiella P.S. Short, 2015
- Genus Roessleria F. Stångberg & A. Anderberg in Stångberg et al., 2018
- Genus Rohria M. Vahl, 1791
- Genus Rojasianthe Standley & Steyermark, 1940
- Genus Rolandra Rottbøll, 1775
- Genus Roldana La Llave in La Llave & Lexarza, 1825
- Genus Rolfinkia Zenker, 1837
- Genus Roodebergia B. Nordenstam, 2002
- Genus Roquea B. Loeuille & G. M. Antar, 2024
- Genus Rosalesia La Llave in La Llave & Lexarza, 1824
- Genus Rosenia Thunberg, 1800
- Genus Rosilla Lessing, 1832 accepted as Dyssodia Cavanilles, 1801
- Genus Rothia Schreber, 1791
- Genus Rothia Lamarck, 1792
- Genus Rothmaleria Font Quer in Font Quer & Rothmaler, 1940
- Genus Ruckeria A.P. de Candolle, 1838
- Genus Rudbeckia Linnaeus, 1753
- Genus Rugelia Shuttleworth ex Chapman, 1860
- Genus Ruilopezia J. Cuatrecasas, 1976
- Genus Rumfordia A.P. de Candolle, 1836
- Genus Russowia C. Winkler, 1890
- Genus Ruthrum J. Hill, 1763
- Genus Rutidochlamys Sonder, 1853
- Genus Rutidosis A.P. de Candolle, 1838
- Genus Rydbergia E.L. Greene, 1898
- Genus Sabazia Cassini in F. Cuvier, 1827
- Genus Sabbata Vellozo, 1829
- Genus Sachsia Grisebach, 1866
- Genus Sagmen J. Hill, 1762
- Genus Saintmorysia Endlicher, 1838
- Genus Salcedoa F. Jiménez R. & L. Katinas in F. Jiménez R. et al., 2004
- Genus Salmea A.P. de Candolle, 1813
- Genus Salmeopsis Bentham in Bentham & J.D. Hooker, 1873 accepted as Salmea A.P. de Candolle, 1813
- Genus Salviastrum Heister ex Fabricius, 1759
- Genus Sampera V.A. Funk & H.E. Robinson, 2009
- Genus Sanrobertia G.L. Nesom, 2018
- Genus Santolina Linnaeus, 1753
- Genus Santonica W. Griffith, 1848
- Genus Santosia R.M. King & H.E. Robinson, 1980
- Genus Sanvitalia Lamarck, 1792
- Genus Sanvitaliopsis K.H. Schultz ex Greenman, 1905
- Genus Sarcanthemum Cassini, 1818
- Genus Sartorina R.M. King & H.E. Robinson, 1974
- Genus Sartwellia A. Gray, 1852
- Genus Saubinetia E.J. Remy in C. Gay, 1849
- Genus Saulcya Michon, 1853
- Genus Saussurea A.P. de Candolle, 1810
- Genus Scabrethia W.A. Weber, 1999
- Genus Scalesia Arnott in Lindley, 1836
- Genus Scalia Sims, 1806 accepted as Podolepis Labillardière, 1806
- Genus Scaliopsis Walpers, 1840
- Genus Scapisenecio A.N. Schmidt‐Lebuhn, 2020
- Genus Scariola F.W. Schmidt, 1795 accepted as Lactuca Linnaeus, 1753
- Genus Scepinia Necker ex Cassini in F. Cuvier, 1825
- Genus Schaetzellia Klotzsch, 1849
- Genus Schaetzellia C.H. Schultz-Bipontinus, 1850 accepted as Macvaughiella R.M. King & H.E. Robinson, 1968
- Genus Scherya R.M. King & H. Robinson, 1977
- Genus Schischkinia Iljin, 1935
- Genus Schistocarpha Lessing, 1831
- Genus Schistostephium Lessing, 1832
- Genus Schizogyne Cassini in F. Cuvier, 1828
- Genus Schizophyllum Nuttall, 1841 accepted as Lipochaeta A.P. de Candolle, 1836
- Genus Schizopsera Turczaninow, 1851 accepted as Schizoptera P.K.N.S. Turczaninow, 1851
- Genus Schizoptera P.K.N.S. Turczaninow, 1851
- Genus Schizoptera G. Bentham, 1873 accepted as Schizoptera P.K.N.S. Turczaninow, 1851
- Genus Schizotrichia Bentham in Bentham & J.D. Hooker, 1873
- Genus Schkuhria A.W. Roth, 1797
- Genus Schlagintweitia Grisebach, 1853
- Genus Schlechtendalia Willdenow, 1803
- Genus Schlechtendalia Lessing, 1830
- Genus Schmalhausenia C. Winkler, 1892
- Genus Schmidtia Moench, 1802
- Genus Schnittspahnia C.H. Schultz-Bipontinus, 1842
- Genus Schoenia Steetz in J.G.C. Lehmann, 1845
- Genus Schomburghia A.P. de Candolle, 1838
- Genus Schortia Vilmorin, 1863
- Genus Schumeria Iljin, 1960 accepted as Serratula Linnaeus, 1753
- Genus Sciadioseris G. Kunze, 1851
- Genus Sciadocephala Mattfeld, 1938
- Genus Sckuhria Moench, 1794
- Genus Sclerobasis Cassini, 1818
- Genus Sclerocarpus N.J. Jacquin, 1781
- Genus Scleroleima J.D. Hooker, 1846
- Genus Sclerolepis Cassini, 1816
- Genus Sclerolepis Monnier, 1829
- Genus Sclerophyllum Gaudin, 1829
- Genus Sclerorhachis (K.H. Rechinger fil.) K.H. Rechinger fil., 1969
- Genus Sclerostephane Chiovenda, 1929
- Genus Scolospermum C.F. Lessing, 1830
- Genus Scolymus Linnaeus, 1753
- Genus Scorzonella Nuttall, 1841 accepted as Microseris D. Don, 1832
- Genus Scorzonera Linnaeus, 1753
- Genus Scorzoneroides Moench, 1794
- Genus Scrobicaria Cassini in F. Cuvier, 1827
- Genus Scyphocoronis A. Gray, 1852 accepted as Millotia Cassini, 1829
- Genus Scyphopappus B. Nordenstam, 1976 accepted as Argyranthemum P.B. Webb in P.B. Webb & Berthelot, 1839
- Genus Seala Adanson, 1763
- Genus Sebastiania Bertoloni, 1822
- Genus Selleophytum Urban, 1915 accepted as Coreopsis Linnaeus, 1753
- Genus Selloa K.P.J. Sprengel, 1818
- Genus Selloa Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Senecillicacalia Kitamura, 1939 accepted as Liguparasenecio H. Ohashi & K. Ohashi, 2008
- Genus Senecillis J. Gaertner, 1791 accepted as Ligularia Cassini, 1816
- Genus Senecio Linnaeus, 1753
- Genus Seneciodes Linnaeus ex T. Post & Kuntze, 1903 accepted as Cyanthillium Blume, 1826
- Genus Senecioides N.L. Britton & P. Wilson, 1930 accepted as Cyanthillium Blume, 1826
- Genus Senecurio G.F. Smith & E. Figueiredo, 2020
- Genus Sergilus J. Gaertner, 1791
- Genus Sericocarpus C.G.D. Nees, 1832
- Genus Seridia A.L. Jussieu, 1789 accepted as Centaurea Linnaeus, 1753
- Genus Serinia Rafinesque, 1817
- Genus Seriola Linnaeus, 1763 accepted as Hypochaeris Linnaeus, 1753
- Genus Seriphidium (Besser ex Lessing) J.-P. Fourreau, 1869 accepted as Artemisia Linnaeus, 1753
- Genus Seriphium Linnaeus, 1753
- Genus Seris Lessing, 1830
- Genus Seris Willdenow, 1807
- Genus Serpaea G. Gardner, 1848
- Genus Serratula Linnaeus, 1753
- Genus Seruneum Kuntze, 1891
- Genus Setachna Dulac, 1867
- Genus Seubertia H.C. Watson, 1844
- Genus Shafera Greenman, 1912
- Genus Shangwua Y.-J. Wang, E. von Raab-Straube, A. Susanna & J.-Q. Liu, 2013
- Genus Shawia J.R. Forster & J.G.A. Forster, 1775 accepted as Olearia Moench, 1802
- Genus Sheareria S. Moore, 1875
- Genus Shinnersia R.M. King & H.E. Robinson, 1970
- Genus Shinnersoseris A.S. Tomb, 1974
- Genus Siapaea J.F. Pruski, 1996
- Genus Sideranthus C.G.D. Nees in Wied-Neuwied, 1840 accepted as Machaeranthera C.G.D. Nees, 1832
- Genus Sidneya E.E. Schilling & J.L. Panero, 2011
- Genus Siebera J. Gay, 1827
- Genus Siegesbeckia E.G. von Steudel, 1841 accepted as Sigesbeckia Linnaeus, 1753
- Genus Siemssenia Steetz in J.G.C. Lehmann, 1845
- Genus Sigesbeckia Linnaeus, 1753
- Genus Siloxerus Labillardière, 1806
- Genus Silphidium A. Massalongo, 1853 †
- Genus Silphidium (Torrey & A. Gray) Mesfin Tadesse & D.J. Crawford, 2023
- Genus Silphiosperma Steetz in J.G.C. Lehmann, 1845
- Genus Silphium Linnaeus, 1753
- Genus Silybum S. Vaillant, 1754
- Genus Simblocline A.P. de Candolle, 1836
- Genus Simlera Bubani, 1899
- Genus Simsia Persoon, 1807
- Genus Sinacalia H.E. Robinson & R.D. Brettell, 1973
- Genus Sinclairia W.J. Hooker & Arnott, 1841
- Genus Sinclairiopsis Rydberg, 1927 accepted as Sinclairia W.J. Hooker & Arnott, 1841
- Genus Sinobouffordia G.L. Nesom, 2020
- Genus Sinoleontopodium Y.L. Chen, 1985
- Genus Sinosenecio B. Nordenstam, 1978
- Genus Sinoseris N. Kilian, Z.-H. Wang & H. Peng in Wang et al., 2020
- Genus Sinosidus G.L. Nesom, 2020
- Genus Siphonogyne Cassini, 1827 accepted as Eriocephalus Linnaeus, 1753
- Genus Sipolisia Glaziou ex D. Oliver, 1894
- Genus Sitilias Rafinesque, 1838 accepted as Pyrrhopappus A.P. de Candolle, 1838
- Genus Skirrhophorus A.P. de Candolle, 1838
- Genus Smallanthus Mackenzie in J.K. Small, 1933
- Genus Soaresia C.H. Schultz-Bipontinus, 1863
- Genus Sobreyra Ruiz & Pavon, 1794
- Genus Sogalgina Cassini, 1818
- Genus Solanecio (C.H. Schultz-Bipontinus) W.G. Walpers, 1846
- Genus Soldevilla Lagasca, 1805
- Genus Solenogyne Cassini in F. Cuvier, 1828
- Genus Solenogyne Cassini, 1827 accepted as Eriocephalus Linnaeus, 1753
- Genus Solenotheca Nuttall, 1841
- Genus Solidago Linnaeus, 1753
- Genus Solidago P. Miller, 1754
- Genus Solidaster Wehrhahn in Bondstedt, 1932
- Genus Soliva Ruiz & Pavon, 1794
- Genus Solivaea Cassini in F. Cuvier, 1823
- Genus Solstitiaria J. Hill, 1762
- Genus Sommerfeltia Lessing, 1832
- Genus Sonchella A.N. Sennikov, 2007
- Genus Sonchus Linnaeus, 1753
- Genus Sonchustenia Sventenius, 1960
- Genus Sondottia P.S. Short, 1989
- Genus Soroseris Stebbins, 1940
- Genus Sosnovskya Takhtajan, 1936
- Genus Soyeria A. Monnier, 1829
- Genus Spadactis Cassini in F. Cuvier, 1827
- Genus Spadonia Lessing, 1832
- Genus Spaniopappus B.L. Robinson, 1926
- Genus Spanioptilon Lessing, 1832
- Genus Sparganophoros Adanson accepted as Sparganophorus Boehmer in Ludwig, 1760
- Genus Sparganophorus Boehmer in Ludwig, 1760
- Genus Spathipappus N.N. Tzvelev in B.K. Schischkin & E.G. Bobrov, 1961 accepted as Tanacetum Linnaeus, 1753
- Genus Sphacophyllum Bentham, 1873 accepted as Anisopappus W.J. Hooker & Arnott, 1837
- Genus Sphaeranthus Linnaeus, 1753
- Genus Sphaereupatorium (O. Hoffmann) O. Kuntze ex B.L. Robinson, 1920
- Genus Sphaerocephala J. Hill, 1762
- Genus Sphaerocephalus O. Kuntze, 1891
- Genus Sphaerocephalus Lagasca ex A.P. de Candolle, 1812
- Genus Sphaeroclinium (A.P. de Candolle) C.H. Schultz-Bipontinus, 1844 accepted as Cotula Linnaeus, 1753
- Genus Sphaeromeria Nuttall, 1841
- Genus Sphaeromorphaea A.P. de Candolle, 1838 accepted as Epaltes Cassini, 1818
- Genus Sphaerophora C.H. Schultz-Bipontinus, 1863
- Genus Sphagneticola O. Hoffmann, 1900
- Genus Spharganophorus Boehmer in Ludwig, 1760
- Genus Sphenogyne R. Brown in W.T. Aiton, 1813 accepted as Ursinia J. Gaertner, 1791
- Genus Spilacron Cassini in F. Cuvier, 1827
- Genus Spilanthes N.J. Jacquin, 1760
- Genus Spinoliva G. Sancho, F. Luebert & L. Katinas in Sancho et al., 2018
- Genus Spiracantha Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Spiralepis D. Don, 1826
- Genus Spiridanthus Fenzl ex Endlicher, 1842
- Genus Spirochaeta Turczaninow, 1851
- Genus Spiropodium F. von Mueller, 1858
- Genus Spiroseris K.H. Rechinger, 1977
- Genus Spitzelia C.H. Schultz-Bipontinus, 1833
- Genus Spixia F. von Paula von Schrank, 1821
- Genus Spongotrichum C.G.D. Nees, 1832
- Genus Sprunnera C.H. Schultz-Bipontinus ex Walpers, 1843
- Genus Squamopappus R.K. Jansen, N.A. Harriman & L.E. Urbatsch, 1982
- Genus Stachyanthus A.P. de Candolle, 1836
- Genus Stachycephalum K.H. Schultz ex Bentham, 1872
- Genus Staebe J. Hill, 1762
- Genus Staehelina Linnaeus, 1753
- Genus Standleyanthus R.M. King & H.E. Robinson, 1971
- Genus Stanfieldia J.K. Small, 1903
- Genus Starkea Willdenow, 1803
- Genus Staurochlamys J.G. Baker, 1889
- Genus Stebbinsia Lipschitz, 1956
- Genus Stebbinsoseris K.L. Chambers, 1991
- Genus Stechmannia A.P. de Candolle, 1838
- Genus Steetzia Sonder, 1853
- Genus Stegonotus Cassini in F. Cuvier, 1825
- Genus Steiractinia S.F. Blake, 1915
- Genus Steiractis A.P. de Candolle, 1836
- Genus Steiractis Rafinesque, 1837
- Genus Steirocoma (A.P. de Candolle) H.G.L. Reichenbach, 1841 accepted as Dicoma Cassini, 1817
- Genus Steirodiscus Lessing, 1832
- Genus Steiroglossa A.P. de Candolle, 1838
- Genus Steleocodon A. Gilli, 1983 accepted as Phalacraea A.P. de Candolle, 1836
- Genus Stelmanis Rafinesque, 1837
- Genus Stemmacantha Cassini, 1817 accepted as Rhaponticum S. Vaillant, 1754
- Genus Stemmatella Weddell ex Bentham & J.D. Hooker, 1873 accepted as Galinsoga Ruiz & Pavon, 1794
- Genus Stemmodontia Cassini, 1817
- Genus Stenachaenium Bentham in Bentham & J.D. Hooker, 1873
- Genus Stenactis Cassini in F. Cuvier, 1825 accepted as Erigeron Linnaeus, 1753
- Genus Stenocarpha S.F. Blake, 1915
- Genus Stenocephalum C.H. Schultz-Bipontinus, 1863
- Genus Stenocline A.P. de Candolle, 1838
- Genus Stenogyne Cassini, 1827 accepted as Eriocephalus Linnaeus, 1753
- Genus Stenolophus Cassini in F. Cuvier, 1826
- Genus Stenopadus S.F. Blake, 1931
- Genus Stenophalium A.A. Anderberg, 1991
- Genus Stenops B. Nordenstam, 1978
- Genus Stenoseris C. Shih, 1991 accepted as Lactuca Linnaeus, 1753
- Genus Stenotheca A. Monnier, 1829
- Genus Stenotopsis Rydberg, 1900 accepted as Ericameria Nuttall, 1840
- Genus Stenotus Nuttall, 1840
- Genus Stephananthus J.G.C. Lehmann, 1827
- Genus Stephanbeckia H. Robinson & V.A. Funk, 2011
- Genus Stephanochilus Cosson ex R. Maire, 1935
- Genus Stephanocoma Lessing, 1832
- Genus Stephanodoria E.L. Greene, 1895
- Genus Stephanolepis S.M. Moore, 1900 accepted as Erlangea C.H. Schultz-Bipontinus, 1853
- Genus Stephanomeria Nuttall, 1841
- Genus Stephanopappus Lessing, 1831
- Genus Stephanopholis S.F. Blake, 1913 accepted as Chromolepis Bentham, 1840
- Genus Steptorhamphus Bunge, 1852 accepted as Lactuca Linnaeus, 1753
- Genus Stera Ewart, 1912
- Genus Stereosanthus Franchet, 1896
- Genus Steriphe R.A. Philippi, 1863
- Genus Stevia Cavanilles, 1797
- Genus Steviopsis R.M. King & H.E. Robinson, 1971
- Genus Steyermarkina R.M. King & H.E. Robinson, 1971
- Genus Stictophyllum Edgeworth, 1845
- Genus Stifftia J.C. Mikan, 1820
- Genus Stigmatotheca C.H. Schultz-Bipontinus in P.B. Webb & S. Berthelot, 1844
- Genus Stilpnogyne A.P. de Candolle, 1838
- Genus Stilpnolepis I.M. Krascheninnikov, 1946
- Genus Stilpnopappus C.F.P. Martius ex A.P. de Candolle, 1836
- Genus Stilpnophyton Lessing, 1832 accepted as Athanasia Linnaeus, 1763
- Genus Stilpnophytum C.F. Lessing, 1832 accepted as Athanasia Linnaeus, 1763
- Genus Stizolophus Cassini in F. Cuvier, 1826
- Genus Stobaea Thunberg, 1800 accepted as Berkheya F. Ehrhart, 1784
- Genus Stoebe Linnaeus, 1753
- Genus Stokesia L'Héritier de Brutelle, 1789
- Genus Stomatanthes R.M. King & H.E. Robinson, 1970
- Genus Stomatochaeta (S.F. Blake) Maguire & Wurdack, 1957
- Genus Strabonia A.P. de Candolle, 1836
- Genus Stramentopappus H.E. Robinson & V.A. Funk, 1987
- Genus Streckera C.H. Schultz-Bipontinus, 1834
- Genus Streptoglossa Steetz ex F. von Mueller, 1863
- Genus Strobocalyx (Blume ex A.P. de Candolle) Spach, 1841
- Genus Strongyloma A.P. de Candolle, 1838
- Genus Strongylomopsis Spegazzini, 1899
- Genus Strongylosperma Lessing, 1832
- Genus Strophopappus A.P. de Candolle, 1836 accepted as Stilpnopappus C.F.P. Martius ex A.P. de Candolle, 1836
- Genus Strotheria B.L. Turner, 1972
- Genus Struchium P. Browne, 1756 accepted as Sparganophoros Adanson
- Genus Stuartina Sonder, 1853
- Genus Stuckertiella Beauverd, 1913
- Genus Stuessya B.L. Turner & F. Davies, 1980
- Genus Stylesia Nuttall, 1841
- Genus Stylimnus Rafinesque, 1819
- Genus Stylocline Nuttall, 1840
- Genus Stylolepis J.G.C. Lehmann, 1828
- Genus Styloncerus K.P.J. Sprengel, 1818
- Genus Stylopappus Nuttall, 1841 accepted as Agoseris Rafinesque, 1817
- Genus Stylotrichium Mattfeld in Pilger, 1923
- Genus Succisocrepis Fourreau, 1869
- Genus Suprago J. Gaertner, 1791
- Genus Susanna E.P. Phillips, 1950
- Genus Sventenia Font Quer, 1949
- Genus Swammerdamia A.P. de Candolle, 1838 accepted as Ozothamnus R. Brown, 1817
- Genus Swertia Boehmer in Ludwig, 1760
- Genus Swinburnia Ewart, 1907
- Genus Sycodium Pomel, 1874
- Genus Symblomeria Nuttall, 1840
- Genus Symphipappus Klatt, 1896
- Genus Symphyllocarpus Maximowicz, 1859
- Genus Symphyochaeta (A.P. de Candolle) C. Skottsberg, 1951 accepted as Senecio Linnaeus, 1753
- Genus Symphyomera J.D. Hooker, 1847
- Genus Symphyopappus Turczaninow, 1848
- Genus Symphyotrichum C.G.D. Nees, 1832
- Genus Synarthrum Cassini in F. Cuvier, 1827
- Genus Syncalathium Lipschitz, 1956
- Genus Syncarpha A.P. de Candolle, 1810
- Genus Syncephalantha Bartling, 1838
- Genus Syncephalum A.P. de Candolle, 1838
- Genus Synchaeta M.E. Kirpicznikov in M.E. Kirpicznikov & L.A. Kuprijanova, 1950
- Genus Synchodendron Bojer ex A.P. de Candolle, 1836
- Genus Syncretocarpus S.F. Blake, 1916
- Genus Synedrella J. Gaertner, 1791
- Genus Synedrellopsis Hieronymus & O. Kuntze in O. Kuntze, 1898
- Genus Syneilesis Maximowicz, 1859
- Genus Synosma Rafinesque ex N.L. Britton & A. Brown, 1898 accepted as Senecio Linnaeus, 1753
- Genus Synotis (C.B. Clarke) C. Jeffrey & Y.L. Chen, 1984
- Genus Syntrichopappus A. Gray in Torrey, 1857
- Genus Synurus Iljin, 1926
- Genus Syreitschikovia Pavlov, 1933
- Genus Taeckholmia L. Boulos, 1967
- Genus Tafalla D. Don, 1831 accepted as Andicolea L. Mayta & E. Molinari-Novoa, 2021
- Genus Tagetes Linnaeus, 1753
- Genus Taimingasa (S. Kitamura) C. Ren & Q.-E. Yang in Ren et al., 2017
- Genus Takeikadzuchia Kitagawa & Kitamura, 1934 accepted as Olgaea Iljin, 1922
- Genus Takhtajaniantha E.A. Nazarova, 1990
- Genus Takhtajanianthus A.B. De, 1988 accepted as Rhanteriopsis S. Rauschert, 1982
- Genus Talamancalia H. Robinson & J. Cuatrecasas, 1994
- Genus Talamancaster J.F. Pruski, 2017
- Genus Tamananthus V.M. Badillo, 1985
- Genus Tamania J. Cuatrecasas, 1976
- Genus Tamaulipa R.M. King & H.E. Robinson, 1971
- Genus Tamayoa Badillo, 1944
- Genus Tanacetopsis (N.N. Tzvelev) S.S. Kovalevskaja, 1962
- Genus Tanacetum Linnaeus, 1753
- Genus Taplinia N.S. Lander, 1989
- Genus Taraxacum Zinn, 1757
- Genus Taraxacum F.H. Wiggers, 1780
- Genus Tarchonanthus Linnaeus, 1753
- Genus Tarlmounia H. Robinson, S.C. Keeley, J.J. Skvarla & R. Chan, 2008
- Genus Tecmarsis A.P. de Candolle, 1836
- Genus Tehuana J.L. Panero & J.L. Villaseñor, 1997
- Genus Tehuasca J.L. Panero, 2019
- Genus Teixeiranthus R.M. King & H.E. Robinson, 1980
- Genus Telanthophora H.E. Robinson & R.D. Brettell, 1974
- Genus Telekia J.C.G. Baumgarten, 1816
- Genus Telesia Rafinesque, 1837
- Genus Telmatophila C.F.P. Martius ex J.G. Baker in C.F.P. Martius, 1873
- Genus Temnolepis J.G. Baker, 1887
- Genus Tenorea Colla, 1824
- Genus Tenrhynea O.M. Hilliard & B.L. Burtt, 1981
- Genus Tephroseris (H.G.L. Reichenbach) H.G.L. Reichenbach, 1841
- Genus Tephrothamnus C.H. Schultz-Bipontinus, 1863
- Genus Tepion Adanson, 1763
- Genus Tepuipappus J.F. Pruski, 2023
- Genus Terana La Llave, 1884
- Genus Terranea Colla, 1835
- Genus Terrentia Vellozo, 1831 accepted as Torrentia Vellozo, 1831
- Genus Tessaria Ruiz & Pavon, 1794
- Genus Tessenia P. Bubani, 1899
- Genus Tetracanthus A. Richard in Sagra, 1850
- Genus Tetracarpum Moench, 1802 accepted as Schkuhria A.W. Roth, 1797
- Genus Tetrachyron Schlechtendal, 1847
- Genus Tetradymia A.P. de Candolle, 1838
- Genus Tetragonosperma Scheele, 1849
- Genus Tetragonotheca Linnaeus, 1753
- Genus Tetragonothela accepted as Tetragonotheca Linnaeus, 1753
- Genus Tetralix J. Hill, 1762
- Genus Tetramolopium C.G.D. Nees, 1832
- Genus Tetramorphaea A.P. de Candolle, 1833
- Genus Tetraneuris E.L. Greene, 1898
- Genus Tetranthus O. Swartz, 1788
- Genus Tetraotis Reinwardt, 1825
- Genus Tetraperone Urban, 1901
- Genus Tetrodus (Cassini) Lessing, 1832 accepted as Helenium Linnaeus, 1753
- Genus Thaminophyllum W.H. Harvey in W.H. Harvey & Sonder, 1865
- Genus Thamnoseris F. Philippi, 1875
- Genus Thelechitonia Cuatrecasas, 1954 accepted as Sphagneticola O. Hoffmann, 1900
- Genus Thelesperma Lessing, 1831
- Genus Thelythamnos A. Sprengel, 1828
- Genus Theodorea (Cassini) Cassini in F. Cuvier, 1827
- Genus Therogeron A.P. de Candolle, 1836
- Genus Therolepta Rafinesque, 1825
- Genus Thespidium F. von Mueller ex Bentham, 1867
- Genus Thespidium F. von Mueller in W. Landsborough, 1862
- Genus Thespis A.P. de Candolle, 1833
- Genus Thevenotia A.P. de Candolle, 1833
- Genus Thinobia R.A. Philippi, 1894
- Genus Thiseltonia Hemsley, 1905
- Genus Thlipsocarpus G. Kunze, 1846
- Genus Thodaya R.H. Compton, 1931
- Genus Thorelia Gagnepain, 1920 accepted as Vernonia Schreber, 1791
- Genus Thoreliella Wu, 1957 accepted as Vernonia Schreber, 1791
- Genus Thouarsia É.P. Ventenat ex A.P. de Candolle, 1836 accepted as Psiadia N.J. Jacquin ex Willdenow, 1803
- Genus Thrincia A.W. Roth, 1797 accepted as Leontodon Linnaeus, 1753
- Genus Thrixa Dulac, 1867
- Genus Thuraria Anonymous, 1813
- Genus Thurovia J.N. Rose, 1895
- Genus Thymophylla Lagasca, 1816
- Genus Thymopsis Bentham in Bentham & J.D. Hooker, 1873
- Genus Thyopsis H.A. Weddell, 1856 accepted as Andicolea L. Mayta & E. Molinari-Novoa, 2021
- Genus Thyrsanthema Necker ex O. Kuntze, 1891
- Genus Thysanurus O. Hoffmann, 1889
- Genus Tiarocarpus K.H. Rechinger f., 1972 accepted as Cousinia Cassini in F. Cuvier, 1827
- Genus Tibestina Maire, 1932 accepted as Dicoma Cassini, 1817
- Genus Tibetiodes G.L. Nesom, 2020
- Genus Tibetoseris A.N. Sennikov, 2007
- Genus Tietkensia P.S. Short, 1990
- Genus Tilesia G.F.W. Meyer, 1818
- Genus Timanthea R.A. Salisbury, 1796
- Genus Tisserantia Humbert, 1927 accepted as Sphaeranthus Linnaeus, 1753
- Genus Tithonia Desfontaines ex A.L. Jussieu, 1789
- Genus Toiyabea R.P. Roberts, L.E. Urbatsch & K.M. Neubig, 2005
- Genus Tolbonia O. Kuntze, 1891
- Genus Tollatia Endlicher, 1838
- Genus Tolpis Adanson, 1763
- Genus Tomanthea A.P. de Candolle, 1838
- Genus Tomentaurum G.L. Nesom, 1991
- Genus Tonalanthus Brandegee, 1914
- Genus Tonestus A. Nelson, 1904
- Genus Torrentia Vellozo, 1831
- Genus Tostimontia S. Díaz Píedrahíta, 2001
- Genus Tourneuxia E. Cosson, 1859
- Genus Townsendia W.J. Hooker, 1834
- Genus Toxacanthus accepted as Millotia Cassini, 1829
- Genus Toxanthes Turczaninow, 1851 accepted as Millotia Cassini, 1829
- Genus Trachodes D. Don, 1830
- Genus Tracyina S.F. Blake, 1937
- Genus Traganthes Wallroth, 1822
- Genus Tragoceros Kunth in Humboldt, Bonpland & Kunth, 1818 accepted as Zinnia Linnaeus, 1759
- Genus Tragopogon Linnaeus, 1753
- Genus Tragopogonodes O. Kuntze, 1891
- Genus Trattenikia Persoon, 1807
- Genus Traversia J.D. Hooker, 1864
- Genus Trepadonia H.E. Robinson, 1994
- Genus Triachne Cassini, 1817
- Genus Trianthaea (A.P. de Candolle) Spach, 1841 accepted as Oliganthes Cassini, 1817
- Genus Trianthus J.D. Hooker, 1846
- Genus Tricarpha E.K. Longpre, 1970
- Genus Trichaetolepis Rydberg, 1915
- Genus Trichanthemis Regel & Schmalhausen, 1877
- Genus Trichanthodium Sonder & F. von Mueller, 1853
- Genus Trichapium A. Gilli, 1983 accepted as Clibadium F. Allamand ex Linnaeus, 1771
- Genus Trichocline Cassini, 1817
- Genus Trichocoronis A. Gray, 1849
- Genus Trichocoryne S.F. Blake, 1924
- Genus Trichocrepis Visiani, 1826
- Genus Trichogonia (A.P. de Candolle) G. Gardner, 1846
- Genus Trichogoniopsis R.M. King & H.E. Robinson, 1972
- Genus Trichogyne Lessing, 1831
- Genus Tricholepis A.P. de Candolle, 1833
- Genus Trichophyllum Nuttall, 1818 accepted as Eriophyllum Lagasca, 1816
- Genus Trichoptilium A. Gray in Torrey, 1859
- Genus Trichospira Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Trichostegia Turczaninow, 1851
- Genus Trichostemma Cassini in F. Cuvier, 1827
- Genus Trichostephium Cassini in F. Cuvier, 1828
- Genus Trichymenia Rydberg, 1914
- Genus Tridactylina (A.P. de Candolle) Schultz-Bipontinus in P.B. Webb & Berthelot, 1844
- Genus Tridax Linnaeus, 1753
- Genus Trigonopterum Steetz ex N.J. Andersson, 1854
- Genus Trigonospermum Lessing, 1832
- Genus Trilisa (Cassini) Cassini in F. Cuvier, 1820
- Genus Trimeranthes (Cassini) Cassini in F. Cuvier, 1829 accepted as Sigesbeckia Linnaeus, 1753
- Genus Trimetra Moçiño ex A.P. de Candolle, 1838
- Genus Trimorpha Cassini, 1817 accepted as Erigeron Linnaeus, 1753
- Genus Trinacte J. Gaertner, 1791
- Genus Trinchinettia Endlicher, 1841
- Genus Trinciatella Adanson, 1763
- Genus Trineuron J.D. Hooker, 1844
- Genus Triniteurybia L. Brouillet, L.E. Urbatsch & R.P. Roberts, 2004
- Genus Trioncinia (F.J.H. von Mueller) J.F. Veldkamp, 1991
- Genus Tripleurospermum C.H. Schultz-Bipontinus, 1844
- Genus Tripleurothemis C.A. Stace, 1990 accepted as Anthepleurospermum W.H.P. Rothmaler, 1963
- Genus Triplocentron Cassini in F. Cuvier, 1826
- Genus Triplocephalum O. Hoffmann in Engler & Prantl, 1894
- Genus Triplotaxis Hutchinson, 1914 accepted as Cyanthillium Blume, 1826
- Genus Tripolion Rafinesque, 1837
- Genus Tripolium C.G.D. Nees, 1832
- Genus Tripterachaenium O. Kuntze, 1898
- Genus Tripteris Lessing, 1831
- Genus Triptilion Ruiz & Pavon, 1794
- Genus Triptilodiscus Turczaninow, 1851
- Genus Trixis P. Browne, 1756
- Genus Trixis O. Swartz, 1788
- Genus Trochoseris Poeppig & Endlicher ex Endlicher, 1838
- Genus Troglophyton O.M. Hilliard & B.L. Burtt, 1981
- Genus Trommsdorffia J.J. Bernhardi, 1800
- Genus Tropidolepis Tausch, 1829
- Genus Troximon T. Nuttall, 1841
- Genus Troximon J. Gaertner, 1791 accepted as Krigia Schreber, 1791
- Genus Trychinolepis B.L. Robinson, 1928 accepted as Ophryosporus Meyen, 1834
- Genus Tuberculocarpus J.F. Pruski, 1996
- Genus Tuberostyles G. Bentham & J.D. Hooker, 1873 accepted as Tuberostylis Steetz in B.C. Seemann, 1853
- Genus Tuberostylis Steetz in B.C. Seemann, 1853
- Genus Tubilium Cassini, 1817
- Genus Tuckermannia Nuttall, 1841 accepted as Coreopsis Linnaeus, 1753
- Genus Tugarinovia Iljin, 1928
- Genus Tulocarpus W.J. Hooker & Arnott, 1838
- Genus Tumionella E.L. Greene, 1906
- Genus Turanecio E. Hamzaoğlu in E. Hamzaoğlu, Ü. Budak & A. Aksoy, 2011
- Genus Turaniphytum P.P. Poljakov in B.K. Schischkin & E.G. Bobrov, 1961
- Genus Turczaninovia A.P. de Candolle, 1836
- Genus Turczaninowia S.F.L. Endlicher, 1837 accepted as Turczaninovia A.P. de Candolle, 1836
- Genus Turkia Ş. Yıldırımlı, 2020 accepted as Gelasia Cassini, 1818
- Genus Turpinia Bonpland in Humboldt & Bonpland, 1807 accepted as Fulcaldea Poiret, 1817
- Genus Turpinia Lexarza, 1824 accepted as Fulcaldea Poiret, 1817
- Genus Tursenia Cassini in F. Cuvier, 1825
- Genus Tussilagites Grüss, 1927 †
- Genus Tussilago Linnaeus, 1753
- Genus Tuxtla J.L. Villaseñor & J.L. Strother, 1989
- Genus Tyleropappus Greenman, 1931 accepted as Calea Linnaeus, 1763
- Genus Tylloma D. Don, 1830
- Genus Tyrimnus (Cassini) Cassini in F. Cuvier, 1826
- Genus Tysonia F. von Mueller, 1896
- Genus Tzvelevopyrethrum R.V. Kamelin in T.A. Adylov & T.I. Zuckerwanik, 1993
- Genus Ubiaea J. Gay ex A. Richard, 1848
- Genus Ucacea Cassini in F. Cuvier, 1823 accepted as Synedrella J. Gaertner, 1791
- Genus Ucacou Adanson, 1763 accepted as Synedrella J. Gaertner, 1791
- Genus Uechtritzia Freyn, 1892
- Genus Ugamia N.V. Pavlov, 1950
- Genus Uhdea C.S. Kunth, 1848 accepted as Montanoa Cervantes in La Llave & Lexarza, 1825
- Genus Uleophytum Hieronymus in Ule, 1907
- Genus Unamia E.L. Greene, 1903
- Genus Uncasia E.L. Greene, 1903
- Genus Uniyala H.E. Robinson & J.J. Skvarla, 2009
- Genus Unxia Linnaeus f., 1782
- Genus Urbananthus R.M. King & H.E. Robinson, 1971
- Genus Urbanisol O. Kuntze, 1891
- Genus Urbinella Greenman, 1903
- Genus Urmenetea Philippi, 1860
- Genus Urolepis (A.P. de Candolle) R.M. King & H.E. Robinson, 1971
- Genus Uropappus Nuttall, 1841
- Genus Urospermum Scopoli, 1777
- Genus Urostemon B. Nordenstam, 1978
- Genus Urostylis C.F. Meisner, 1839
- Genus Ursinia J. Gaertner, 1791
- Genus Ursiniopsis E.P. Phillips, 1951 accepted as Ursinia J. Gaertner, 1791
- Genus Vanclevea E.L. Greene, 1899
- Genus Vanillosma Spach, 1841
- Genus Vanillosmopsis C.H. Schultz-Bipontinus, 1861 accepted as Eremanthus Lessing, 1829
- Genus Vannillosma Spach, 1841
- Genus Vargasia A.P. de Candolle, 1836
- Genus Varilla A. Gray, 1849
- Genus Varthemia A.P. de Candolle, 1836
- Genus Vasargia Steudel, 1841
- Genus Vasquezia R.A. Philippi, 1860
- Genus Vellereophyton O.M. Hilliard & B.L. Burtt, 1981
- Genus Veltis Adanson, 1763
- Genus Venatris Rafinesque, 1837
- Genus Vendredia Baillon, 1882 accepted as Senecio Linnaeus, 1753
- Genus Venegasia A.P. de Candolle, 1838
- Genus Venidio-Arctotis Hort. accepted as Arctotis Linnaeus, 1753
- Genus Venidium Lessing, 1831 accepted as Arctotis Linnaeus, 1753
- Genus Verbesina Linnaeus, 1753
- Genus Vermifuga Ruiz & Pavon, 1794
- Genus Vernasolis Rafinesque, 1832
- Genus Vernonanthura H.E. Robinson, 1992
- Genus Vernonella Sonder, 1850
- Genus Vernonia Schreber, 1791
- Genus Vernoniastrum H.E. Robinson, 1999
- Genus Vernoniopsis Humbert, 1955
- Genus Veronia accepted as Vernonia Schreber, 1791
- Genus Verutina Cassini in F. Cuvier, 1826
- Genus Vesicarpa Rydberg, 1916
- Genus Veslingia Visiani, 1840 accepted as Guizotia Cassini in F. Cuvier, 1829
- Genus Viborgia K.P.J. Sprengel, 1801
- Genus Vicinia G.L. Nesom, 2020
- Genus Vickia N. Roque & G. Sancho, 2020
- Genus Vickianthus H. Robinson in Robinson et al., 2023
- Genus Vickifunkia C. Ren, L. Wang, I. Illarionova & Q. Yang, 2020
- Genus Vicoa Cassini, 1829
- Genus Vieraea P.B. Webb ex C.H. Schultz-Bipontinus in P.B. Webb & S. Berthelot, 1844 accepted as Vieria P.B. Webb in P.B. Webb & S. Berthelot, 1839
- Genus Viereckia R.M. King & H.E. Robinson, 1975
- Genus Vierhapperia Handel-Mazzetti, 1937
- Genus Vieria P.B. Webb in P.B. Webb & S. Berthelot, 1839
- Genus Vigethia W.A. Weber, 1943
- Genus Vigineixia Pomel, 1874
- Genus Vigolina Poiret in Lamarck, 1808 accepted as Galinsoga Ruiz & Pavon, 1794
- Genus Viguiera Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Vilaria Guettard, 1779
- Genus Villanova Lagasca, 1816
- Genus Villanova Ortega, 1797 accepted as Parthenium Linnaeus, 1753
- Genus Villasenoria B.L. Clark, 1999
- Genus Vilobia Strother, 1968 accepted as Tagetes Linnaeus, 1753
- Genus Vinicia M. Dematteis, 2007
- Genus Viraya Gaudichaud-Beaupré in Freycinet, 1830
- Genus Virea Adanson, 1763
- Genus Virgilia L'Héritier, 1788
- Genus Virginea (A.P. de Candolle) R.M. Nicoli in R.M. Nicoli & Y. Buffard, 1979 accepted as Helichrysum P. Miller, 1754
- Genus Virgulaster J.C. Semple, 1985 accepted as Aster Linnaeus, 1753
- Genus Virgulus Rafinesque, 1837
- Genus Vittadinia A. Richard, 1832
- Genus Vittetia R.M. King & H.E. Robinson, 1974
- Genus Vladimiria Iljin, 1939 accepted as Dolomiaea A.P. de Candolle, 1833
- Genus Vogtia C. Oberprieler & A. Sonboli in A. Sonboli, K. Stroka, S. Kazempour Osaloo & C. Oberprieler, 2012
- Genus Voigtia A.W. Roth, 1790
- Genus Voigtia K.P.J. Sprengel, 1826 accepted as Fulcaldea Poiret, 1817
- Genus Volkensia O. Hoffmann in Engler & Prantl, 1894 accepted as Bothriocline D. Oliver ex Bentham, 1873
- Genus Volutarella Cassini in F. Cuvier, 1826 accepted as Volutaria Cassini, 1816
- Genus Volutaria Cassini, 1816
- Genus Vosacan Adanson, 1763
- Genus Wagenitzia J. Dostál, 1973 accepted as Centaurea Linnaeus, 1753
- Genus Wahlenbergia H.C.F. Schumacher, 1827
- Genus Waitzia J.C. Wendland, 1808
- Genus Waldheimia Karelin & Kirilov, 1842 accepted as Allardia Decaisne in Jacquemont, 1841
- Genus Walshia J.A. Jeanes, 2021
- Genus Walsholaria G.L. Nesom, 2020
- Genus Wamalchitamia J.L. Strother, 1991
- Genus Wardaster J.K. Small, 1926 accepted as Aster Linnaeus, 1753
- Genus Warionia Bentham & Cosson, 1872
- Genus Webbia C.H. Schultz-Bipontinus in W.G. Walpers, 1843
- Genus Webbia A.P. de Candolle, 1836 accepted as Vernonia Schreber, 1791
- Genus Weberaster Á. Löve & D. Löve, 1982 accepted as Aster Linnaeus, 1753
- Genus Weberbaueriella R. Ferreyra, 1955
- Genus Wedelia N.J. Jacquin, 1760
- Genus Welwitschiella O. Hoffmann in Engler & Prantl, 1894
- Genus Wendelboa J.L. van Soest, 1966
- Genus Werneria Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Westoniella J. Cuatrecasas, 1977
- Genus Wettsteinia Petrak, 1910 accepted as Carduus Linnaeus, 1753
- Genus Whitneya A. Gray, 1865 accepted as Arnica Linnaeus, 1753
- Genus Wibelia P.G. Gaertner, B. Meyer & Scherbius, 1801
- Genus Wibelia E. von Roehl, 1813 accepted as Chondrilla Linnaeus, 1753
- Genus Wiborgia A.W. Roth, 1800 accepted as Galinsoga Ruiz & Pavon, 1794
- Genus Wiestia C.H. Schultz-Bipontinus, 1841 accepted as Lactuca Linnaeus, 1753
- Genus Wigandia Necker ex Lessing, 1832
- Genus Wikstroemia K.P.J. Sprengel, 1821
- Genus Wilkesia A. Gray, 1852
- Genus Willdenowa Cavanilles, 1791
- Genus Willemetia Necker, 1777-1778
- Genus Willoughbya Necker ex O. Kuntze, 1891 accepted as Mikania Willdenow, 1803
- Genus Wirtgenia C.H. Schultz-Bipontinus, 1842
- Genus Wollastonia A.P. de Candolle ex Decaisne, 1834 accepted as Melanthera Rohr, 1792
- Genus Wollemiaster G.L. Nesom, 2020
- Genus Woodvillea A.P. de Candolle, 1836
- Genus Wootonella Standley, 1912 accepted as Verbesina Linnaeus, 1753
- Genus Wootonia E.L. Greene, 1898 accepted as Dicranocarpus A. Gray, 1854
- Genus Wuerschmittia C.H. Schultz-Bipontinus ex Walpers, 1846
- Genus Wulffia Necker ex Cassini in F. Cuvier, 1823
- Genus Wunderlichia Riedel ex Bentham & J.D. Hooker, 1873
- Genus Wyethia Nuttall, 1834
- Genus Wyomingia A. Nelson, 1899
- Genus Xalkitis Rafinesque, 1838
- Genus Xalxitis Rafinesque, 1838
- Genus Xanthidium Delpino, 1871 accepted as Ambrosia Linnaeus, 1753
- Genus Xanthisma A.P. de Candolle, 1836
- Genus Xanthium Linnaeus, 1753
- Genus Xantho E.J. Remy, 1849
- Genus Xanthocephalum Willdenow, 1807
- Genus Xanthochrysum Turczaninow, 1851 accepted as Schoenia Steetz in J.G.C. Lehmann, 1845
- Genus Xanthocoma Kunth in Humboldt, Bonpland & Kunth, 1818
- Genus Xanthopappus C. Winkler, 1893
- Genus Xanthophtalmum C.H. Schultz-Bipontinus, 1844 accepted as Xantophtalmum C.H. Schultz-Bipontinus, 1844
- Genus Xanthophthalmum C.H. Schultz Bipontinus, 1844 accepted as Glebionis Cassini in F. Cuvier, 1826
- Genus Xanthopsis (A.P. de Candolle) K.H.E. Koch, 1851 accepted as Psephellus Cassini in F. Cuvier, 1826
- Genus Xantophtalmum C.H. Schultz-Bipontinus, 1844 accepted as Glebionis Cassini in F. Cuvier, 1826
- Genus Xenismia A.P. de Candolle, 1836
- Genus Xenocarpus Cassini in F. Cuvier, 1829
- Genus Xenophontia Vellozo, 1829
- Genus Xenophyllum V.A. Funk, 1997
- Genus Xeranthemum Linnaeus, 1753
- Genus Xeranthium J. Lepechin, 1774
- Genus Xerobius Cassini in F. Cuvier, 1829
- Genus Xerochrysum N.N. Tzvelev, 1990
- Genus Xerolekia A.A. Anderberg, 1991
- Genus Xeroloma Cassini in F. Cuvier, 1829
- Genus Xerothamnus A.P. de Candolle, 1836
- Genus Xerotium Bluff & Fingerhuth, 1825
- Genus Xerxes J.R. Grant, 1994
- Genus Xetoligus Rafinesque, 1838
- Genus Ximenesia Cavanilles, 1793 accepted as Verbesina Linnaeus, 1753
- Genus Xiphochaeta Poeppig in Poeppig & Endlicher, 1843
- Genus Xipholepis Steetz in Peters, 1864
- Genus Xylanthemum N.N. Tzvelev in B.K. Schischkin & E.G. Bobrov, 1961
- Genus Xylorhiza T. Nuttall, 1840
- Genus Xylothamia G.L. Nesom, Y.B. Suh, D.R. Morgan & B.B. Simpson, 1990 accepted as Gundlachia A. Gray, 1880
- Genus Xylovirgata L.E. Urbatsch & R.P. Roberts, 2004
- Genus Xyridanthe Lindley, 1839
- Genus Xyridopsis Welwitsch ex B. Nordenstam, 1978 accepted as Psednotrichia Hiern, 1898
- Genus Yariguianthus S. Díaz-Piedrahita & B.V. Rodríguez-Cabeza, 2012
- Genus Yermo R.D. Dorn, 1991
- Genus Yildirimlia Ö. Kılıç in Kılıç & Yıldırımlı, 2020 accepted as Kilicia Ş. Yıldırımlı, 2022
- Genus Yonglingia G.L. Nesom, 2020
- Genus Youngia Cassini, 1831
- Genus Yunquea Skottsberg, 1929 accepted as Centaurodendron Johow, 1896
- Genus Zacintha P. Miller, 1754 accepted as Crepis Linnaeus, 1753
- Genus Zaluzania Persoon, 1807
- Genus Zandera D.L. Schulz, 1988
- Genus Zarabellia Cassini in F. Cuvier, 1829
- Genus Zemisia B. Nordenstam, 2006
- Genus Zemisne Degener & Sherff, 1935
- Genus Zexmenia La Llave in La Llave & Lexarza, 1824
- Genus Zeyhera C.F. Lessing, 1832 accepted as Geigeria Griesselich, 1830
- Genus Zeyheria A. Sprengel, 1828 accepted as Geigeria Griesselich, 1830
- Genus Zinnia Linnaeus, 1759
- Genus Zoegaea Linnaeus, 1767
- Genus Zoegea Linnaeus, 1767
- Genus Zollikoferia A.P. de Candolle, 1838
- Genus Zollikoferia C.G.D. Nees in Bluff & Fingerhuth, 1825 accepted as Willemetia Necker, 1777-1778
- Genus Zollikoferiastrum (M.E. Kirpicznikov) R.V. Kamelin in T.A. Adylov & T.I. Zuckerwanik, 1993
- Genus Zollingeria C.H. Schultz-Bipontinus, 1854
- Genus Zonanthemis E.L. Greene, 1897 accepted as Hemizonia A.P. de Candolle, 1836
- Genus Zoutpansbergia Hutchinson, 1946
- Genus Zycona O. Kuntze, 1891
- Genus Zyrphelis Cassini, 1829
- Genus Zyzyura H. Robinson & J.F. Pruski, 2013
- Genus Zyzyxia J.L. Strother, 1991
- Family Asterales (awaiting allocation)
- Family Brunoniaceae Dumortier, 1829 accepted as Goodeniaceae R. Brown, 1810
- Family Calyceraceae R. Brown ex Richard, 1820
- Family Campanulaceae de Jussieu, 1789
- Family Carpodetaceae Fenzl, 1841 accepted as Rousseaceae de Candolle, 1839
- Family Compositae Giseke, 1792 accepted as Asteraceae von Berchtold & J. Presl, 1820
- Family Corokiaceae Kapil ex Takhtajan, 1997 accepted as Argophyllaceae Takhtajan, 1987
- Family Cyphiaceae A.L.P.P. de Candolle, 1839 accepted as Campanulaceae de Jussieu, 1789
- Family Cyphocarpaceae Reveal & Hoogland, 1996 accepted as Campanulaceae de Jussieu, 1789
- Family Donatiaceae B. Chandler, 1911 accepted as Stylidiaceae R. Brown, 1810
- Family Goodeniaceae R. Brown, 1810
- Family Lobeliaceae de Jussieu, 1813 accepted as Campanulaceae de Jussieu, 1789
- Family Menyanthaceae Dumortier, 1829
- Family Nemacladaceae Nuttall, 1842 accepted as Campanulaceae de Jussieu, 1789
- Family Pentaphragmataceae J.G. Agardh, 1858
- Family Phellinaceae Takhtajan, 1967
- Family Rousseaceae de Candolle, 1839
- Family Stylidiaceae R. Brown, 1810
- Order Aucubales accepted as Garryales
- Order Austrobaileyales
- Order Balanophorales accepted as Santalales
- Order Batales accepted as Brassicales
- Order Begoniales accepted as Cucurbitales
- Order Berberidales accepted as Ranunculales
- Order Berberidopsidales
- Order Biebersteiniales accepted as Sapindales
- Order Boraginales
- Order Brassicales
- Order Brexiales accepted as Celastrales
- Order Bromeliales accepted as Poales
- Order Bruniales
- Order Burmanniales accepted as Dioscoreales
- Order Burserales accepted as Sapindales
- Order Buxales
- Order Callitrichales accepted as Lamiales
- Order Calycerales accepted as Asterales
- Order Campanulales accepted as Asterales
- Order Canellales
- Order Capparales accepted as Brassicales
- Order Caryophyllales
- Order Casuarinales accepted as Fagales
- Order Celastrales
- Order Ceratophyllales
- Order Chloranthales
- Order Circaeasterales accepted as Ranunculales
- Order Cistales accepted as Malvales
- Order Colchicales accepted as Liliales
- Order Commelinales
- Order Cornales
- Order Corylales accepted as Fagales
- Order Crossosomatales
- Order Cucurbitales
- Order Cyclanthales accepted as Pandanales
- Order Cynomoriales accepted as Saxifragales
- Order Cyperales accepted as Poales
- Order Daphniphyllales accepted as Saxifragales
- Order Desfontainiales accepted as Bruniales
- Order Diapensiales accepted as Ericales
- Order Didymelales accepted as Buxales
- Order Dilleniales
- Order Dioscoreales
- Order Dipsacales
- Order Ebenales accepted as Ericales
- Order Ericales
- Order Eriocaulales accepted as Poales
- Order Escalloniales
- Order Eucommiales accepted as Garryales
- Order Euphorbiales accepted as Malpighiales
- Order Fabales
- Order Fagales
- Order Francoales accepted as Geraniales
- Order Garryales
- Order Gentianales
- Order Geraniales
- Order Glaucidiales accepted as Ranunculales
- Order Griseliniales accepted as Apiales
- Order Gunnerales
- Order Haemodorales accepted as Commelinales
- Order Haloragales accepted as Saxifragales
- Order Hamamelidales accepted as Saxifragales
- Order Helobiales accepted as Alismatales
- Order Helwingiales accepted as Aquifoliales
- Order Huerteales
- Order Hydatellales accepted as Nymphaeales
- Order Hydrangeales accepted as Cornales
- Order Hydrastidales accepted as Ranunculales
- Order Hydrocharitales accepted as Alismatales
- Order Hydropeltidales accepted as Nymphaeales
- Order Hypericales accepted as Malpighiales
- Order Hypoxidales accepted as Asparagales
- Order Icacinales
- Order Illiciales accepted as Austrobaileyales
- Order Iridales accepted as Asparagales
- Order Juglandales accepted as Fagales
- Order Juncaginales accepted as Alismatales
- Order Juncales accepted as Poales
- Order Lamiales
- Order Laurales
- Order Lecythidales accepted as Ericales
- Order Leitneriales accepted as Sapindales
- Order Liliales
- Order Linales accepted as Malpighiales
- Order Magnoliales
- Order Magnoliopsida (awaiting allocation)
- Order Malpighiales
- Order Malvales
- Order Melanthiales accepted as Liliales
- Order Metteniusales
- Order Myricales accepted as Fagales
- Order Myrsinales accepted as Ericales
- Order Myrtales
- Order Najadales accepted as Alismatales
- Order Nepenthales accepted as Caryophyllales
- Order Nymphaeales
- Order Ochnales accepted as Malpighiales
- Order Oleales accepted as Lamiales
- Order Orchidales accepted as Asparagales
- Order Oxalidales
- Order Pandanales
- Order Papaverales accepted as Ranunculales
- Order Paracryphiales
- Order Parnassiales accepted as Celastrales
- Order Petrosaviales
- Order Picramniales
- Order Piperales
- Order Plantaginales accepted as Lamiales
- Order Plumbaginales accepted as Caryophyllales
- Order Poales
- Order Podostemales accepted as Malpighiales
- Order Polygalales accepted as Fabales
- Order Polygonales accepted as Caryophyllales
- Order Primulales accepted as Ericales
- Order Proteales
- Order Rafflesiales accepted as Malpighiales
- Order Ranunculales
- Order Restionales accepted as Poales
- Order Rhamnales accepted as Rosales
- Order Rhizophorales accepted as Malpighiales
- Order Roridulales accepted as Ericales
- Order Rosales
- Order Rubiales accepted as Gentianales
- Order Rutales accepted as Sapindales
- Order Sabiales accepted as Proteales
- Order Salicales accepted as Malpighiales
- Order Santalales
- Order Sapindales
- Order Sarbaicarpales †
- Order Saxifragales
- Order Scrophulariales accepted as Lamiales
- Order Smilacales accepted as Liliales
- Order Solanales
- Order Stemonales accepted as Pandanales
- Order Tamaricales accepted as Caryophyllales
- Order Tecophilaeales accepted as Asparagales
- Order Theales accepted as Ericales
- Order Thymelaeales accepted as Malvales
- Order Toricelliales accepted as Cornales
- Order Trilliales accepted as Liliales
- Order Triuridales accepted as Pandanales
- Order Trochodendrales
- Order Typhales accepted as Poales
- Order Urticales accepted as Rosales
- Order Vahliales
- Order Viburnales accepted as Dipsacales
- Order Violales accepted as Malpighiales
- Order Vitales
- Order Xanthorrhoeales accepted as Asparagales
- Order Zingiberales
- Order Zygophyllales
- Family Archaefructaceae G. Sun, Q. Ji, D.L. Dilcher, S. Zheng, K.C. Nixon & X. Wang, 2002 †
- Family Sinoherbaceae Z.-J. Liu & X. Wang in Liu et al., 2021 †
- Genus Aachenosaurus Smets, 1887 † accepted as Aachenoxylon M. Hovelacque, 1889 †
- Genus Aachenoxylon M. Hovelacque, 1889 †
- Genus Antholithes A.T. Brongniart, 1822 †
- Genus Archaebuda L.-J. Chen & X. Wang, 2022 †
- Genus Ascarinophyllum J. Čepičková & J. Kvaček, 2022 †
- Genus Atrichodendron Gagnepain, 1950
- Genus Barykovia M.G. Moiseeva, 2012 †
- Genus Bergacarpon J. Marmi, B. Gomez, S. Villalba-Breva & C. Martín-Closas, 2012 †
- Genus Bilitalium F. Buchanan-Hamilton, 1807
- Genus Caliciflora E.M. Friis, K.R. Pedersen & P.R. Crane, 2016 †
- Genus Carpestella M. von Balthazar, K.R. Pedersen, P.R. Crane & E.M. Friis, 2008 †
- Genus Catanthus E.M. Friis, P.R. Crane & K.R. Pedersen, 2020 †
- Genus Cavilignum C. Siegert & E.J. Hermsen, 2020 †
- Genus Chainandra G.O. Poinar Jr. & K.L. Chambers, 2020 †
- Genus Covidifructus Z. Heřmanová, J. Čepičková, J. Kvaček, M. von Balthazar & J. Schönenberger, 2022 †
- Genus Cratolirion C. Coifard, N. Kardjilov & M.E.C. Bernardes-de-Oliveira in Coifard et al., 2019 †
- Genus Culmites A.T. Brongniart, 1822 †
- Genus Cyathitepala G.O. Poinar Jr. & K.L. Chambers, 2020 †
- Genus Dilcherifructus X. Wang, 2021 †
- Genus Dillhoffia S.R. Manchester & K.B. Pigg, 2008 †
- Genus Dinganthus X.-D. Liu, J.B. Diez, Y. Fan, Z.-J. Liu & X. Wang, 2020 †
- Genus Elasmostemon E.M. Friis, P.R. Crane, K.R. Pedersen, M.M. Mendes & J. Kvaček, 2022 †
- Genus Endressistemon E.M. Friis, P.R. Crane, K.R. Pedersen, M.M. Mendes & J. Kvaček, 2022 †
- Genus Exogenites A.T. Brongniart, 1822 †
- Genus Fairlingtonia N.A. Jud, 2015 †
- Genus Florigerminis D.-F. Cui, Y. Hou, P. Yin & X. Wang, 2022 †
- Genus Fouldenia J.M. Bannister, D.E. Lee & J.I. Raine 2005 †
- Genus Friisifructus K.K. Tang, S.Y. Smith & B.A. Atkinson, 2023 †
- Genus Gansufructus B. Du in Du et al., 2021 †
- Genus Gansupeltata G.-T. Wu, W.-X. Ren, L. Han, H.-S. Wang, Y.-F. Hua & B.-N. Sun, 2022 †
- Genus Harmsia E. McIver & J.F. Basinger, 1993 † accepted as Mciveriella A.B. Doweld, 2016 †
- Genus Herbifolia A. Frolov & I. Enushchenko, 2022 †
- Genus Honeytheca I.B. Huegele & S.R. Manchester, 2022 †
- Genus Ibericarpus E.M. Friis, P.R. Crane, K.R. Pedersen, M.M. Mendes & J. Kvaček, 2022 †
- Genus Kachaikenia R. Cunéo & M.A. Gandolfo, 2005 †
- Genus Kenilanthus E.M. Friis, K.R. Pedersen & P.R. Crane, 2016 †
- Genus Lingyuananthus X. Wang, 2022 †
- Genus Mciveriella A.B. Doweld, 2016 †
- Genus Menatanthus D. Uhl, K.N. Paudayal & H. El Atfy in Uhl et al., 2020 †
- Genus Nicolia Unger in Endlicher, 1842 †
- Genus Nitaspermum E.M. Friis, P.R. Crane & K.R. Pedersen, 2018 †
- Genus Othniophyton Manchester, Judd & Correa-Narvaez, 2024 †
- Genus Paisia E.M. Friis, M.M. Mendes & K.R. Pedersen, 2018 †
- Genus Phantophlebia G.O. Poinar, Jr. & K.L. Chambers, 2020 †
- Genus Sherwinoxylon A. Boura & G. Saulnier in Boura et al., 2019 †
- Genus Singpuria D. Ramteke, S.R. Manchester & V.D. Nagrale in Ramteke et al., 2020 †
- Genus Strombothelya G.O. Poinar, Jr. & K.L. Chambers, 2019 †
- Genus Tanispermum E.M. Friis, P.R. Crane & K.R. Pedersen, 2018 †
- Genus Thorphyllum R. Cunéo & M.A. Gandolfo, 2005 †
- Genus Tolmania N.L. Edmonds, R.A. Stockey & G.W. Rothwell, 2022 †
- Genus Ubiquitoxylon E.A. Wheeler in Wheeler et al., 2019 †
- Genus Valvidistemon E.M. Friis, P.R. Crane, K.R. Pedersen, M.M. Mendes & J. Kvaček, 2022 †
- Genus Wingia H. Wang & D.L. Dilcher, 2018 †
- Genus Wireroadia X. Zhang, Y. Wang, D.L. Dilcher & S.R. Manchester, 2020 †
- Genus Zlatkovia G.W. Rothwell & R.A. Stockey, 2022 †
- Genus Comoxia Jud, Bradley, Zahnd, Rothwell & Stockey, 2024 †
- Genus Compitoxylon Gentis, De Franceschi & Boura, 2023 †
- Genus Felinanthus Heřmanová, Von Balthazar, Kvaček & Schönenberger, 2024 †
- Genus Nothophylica Beurel, Bachelier, Schmidt & Sadowski, 2024 †
- Genus Pteroheterochrosperma M.A. Smith, D.E. Greenwalt & S.R. Manchester, 2023 †
- Genus Quadrasubulaflora M.A. Smith, D.E. Greenwalt & S.R. Manchester, 2023 †
- Genus Racheliflora E.M. Friis, P.R. Crane & K.R. Pedersen, 2023 †
- Genus Tortorellixylon C.F. Rombola, R.R. Pujana, D.P. Ruiz & E.S. Bellosi, 2023 †
- Genus Xilinia X. Wang, J.B. Diez, M. Pole & M. García-Ávila, 2023 †
- Superclass Gymnospermae
- Genus Alasemenia Wang, Yang, Liu, Zhou, Xu, Qin & Huang, 2024 †
- Genus Bevhalstia C.R. Hill, 1996 †
- Genus Carpolithus E.T. Artis, 1825 †
- Genus Combina A.A. Santos & X. Wang, 2022 †
- Genus Juraherba G. Han, Z. Liu, X. Liu, L. Mao, F.M.B. Jacques & X. Wang, 2016 †
- Genus Muricosperma L.J. Seyfullah & J. Hilton in Seyfullah et al., 2010 †
- Genus Nothodichocarpum G. Han, Z. Liu & X. Wang, 2017 †
- Genus Problematospermum A.I. Turutanova-Ketova in J.A. Orlov, 1963 ex Krassilov, 1973 †
- Genus Qingganninginfructus X. Wang & Sun in Han et al., 2023 †
- Genus Renbernia E.M. Friis, P.R. Crane & K.R. Pedersen, 2022 †
- Genus Shaolinia Wang & Chen, 2024 †
- Genus Xenofructus Fu, Sun, Zheng & Wang, 2024 †
- Genus Xingxueanthus X. Wang & S. Wang, 2010 †
- Genus Yiduxylon D.M. Wang & L. Liu, 2015 †
- Genus Yuhania Z.-J. Liu & X. Wang, 2016 †
- Class Progymnospermopsida †
- Class Pteridophyta/Pteridospermophyta (unclassified foliage) †
- Class Rhyniopsida †
- Class Trimerophytopsida †
- Class Zosterophyllopsida †
- Order Stenokoleales †
- Genus Ahnetia A.-L. Decombeix & J. Galtier, 2017 †
- Genus Aysenoxylon R.R. Pujana, J.E. Bostelmann, R.A. Ugalde, M.P. Riquelme & T. Torres, 2023 †
- Genus Dameria A.-L. Decombeix, B. Meyer-Berthaud, J. Galtier, J.A. Talent & R. Mawson, 2011 †
- Genus Dibracophyton S.-G. Hao, J.-Z. Xue, X. Zhu & D.-M. Wang, 2012 †
- Genus Douaphyton H.-H. Xu, Y. Wang, P. Tang & Y. Wang, 2017 †
- Genus Endogenites A.T. Brongniart, 1822 †
- Genus Flabellopteris R.W. Gess & C. Prestianni, 2021 †
- Genus Franhueberia L.A. Hoffman & A.M.F. Tomescu, 2013 †
- Genus Jowingera M.A. Bickner & A.M.F. Tomescu, 2019 †
- Genus Kenrickia S. Toledo & A.M.F. Tomescu in Toledo et al., 2021 †
- Genus Leptocentroxyla M.A. Bickner & A.M.F. Tomescu, 2019 †
- Genus Macrotaeniopteris W.P. Schimper, 1869 †
- Genus Mosacaulis R.W.J.M. van der Ham & J.H.A. van Konijnenburg-van Cittert in van der Ham et al., 2011 †
- Genus Nebuloxyla M.A.K. Lalica & A.M.F. Tomescu, 2023 †
- Genus Ninsaria A.-L. Decombeix, J. Galtier, S. McLoughlin & B. Meyer-Berthaud in Decombeix et al., 2019 †
- Genus Oleandridium W.P. Schimper, 1869 †
- Genus Perplexa K.C. Pfeiler & A.M.F. Tomescu, 2023 †
- Genus Petrosjania S.M. Snigirevsky & A.P. Lyubarova, 2023 †
- Genus Planatophyton P. Gerrienne, B. Meyer-Berthaud, N. Yang, P. Steemans & C.-S. Li, 2014 †
- Genus Poacites Schlotheim ex Ballenstedt, 1822 †
- Genus Sporangites J.W. Dawson, 1863 †
- Genus Stenoloboxyla M.A. Bickner & A.M.F. Tomescu, 2019 †
- Genus Taeniopteris A.T. Brongniart, 1828 †
- Genus Tainioxyla M.A. Bickner & A.M.F. Tomescu, 2019 †
- Genus Thursophyton A.G. Nathorst, 1914-1915 †
- Genus Thursophyton A.G. Nathorst ex E.A.N. Arber, 1921 † accepted as Thursophyton A.G. Nathorst, 1914-1915 †
- Genus Tichavekia J. Pšenička, J. Sakala & P. Kraft in Kraft et al., 2019 †
- Genus Tregiovia G. Forte & E. Kustatscher, 2023 †
- Genus Wilhowia P.G. Gensel, 2022 †
- Genus Xadzigacalix A.A. Klymiuk, G.W. Rothwell & R.A. Stockey, 2022 †
- Genus Xinhangia J.-N. Yang & D.-M. Wang, 2022 †
- Genus Yabeiella S. Ôishi, 1931 †
- Phylum Vendophyta † accepted as Algae incertae sedis
- Class Nematophyceae † accepted as Nematophyta †
- Kingdom Protista accepted as Protozoa
- Kingdom Protozoa
- Kingdom Viruses
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