Abalon Adanson, 1763 accepted as Helonias Linnaeus, 1753 (name verified source)
Abalon Adanson, 1763 accepted as Helonias Linnaeus, 1753 (basis of record)
Acaroides C. Kite, 1795 accepted as Xanthorrhoea J.E. Smith, 1798 (basis of record)
Acaroides C. Kite, 1795 accepted as Xanthorrhoea J.E. Smith, 1798 (name verified source)
Acigonium S. Komura, 1999 † (extant flag source)
Acigonium S. Komura, 1999 † (basis of record)
Acigonium S. Komura, 1999 † (name verified source)
Acritodromum G.R. Upchurch & D.L. Dilcher, 1990 † (name verified source)
Acritodromum G.R. Upchurch & D.L. Dilcher, 1990 † (basis of record)
Acritodromum G.R. Upchurch & D.L. Dilcher, 1990 † (extant flag source)
Acroliphonia J.G. Agardh, 1846 accepted as Acrosiphonia J.G. Agardh, 1846 (name verified source)
Acroliphonia J.G. Agardh, 1846 accepted as Acrosiphonia J.G. Agardh, 1846 (basis of record)
Actinovena T. Tanai, 1989 † (basis of record)
Actinovena T. Tanai, 1989 † (name verified source)
Actinovena T. Tanai, 1989 † (extant flag source)
Acutangulisporites A.B. Virbitskas in S.V. Meyen, 1983 † (name verified source)
Acutangulisporites A.B. Virbitskas in S.V. Meyen, 1983 † (extant flag source)
Acutangulisporites A.B. Virbitskas in S.V. Meyen, 1983 † (basis of record)
Adenochaena A.P. de Candolle, 1838 (basis of record)
Adenochaena A.P. de Candolle, 1838 (name verified source)
Adrophyllum M.D. Zalessky, 1937 † (basis of record)
Adrophyllum M.D. Zalessky, 1937 † (name verified source)
Adrophyllum M.D. Zalessky, 1937 † (extant flag source)
Aegle Dulac, 1867 accepted as Najas Linnaeus, 1753 (name verified source)
Aegle Dulac, 1867 accepted as Najas Linnaeus, 1753 (basis of record)
Aeonia J. Lindley, 1824 accepted as Oeonia J. Lindley, 1824 (basis of record)
Aeonia J. Lindley, 1824 accepted as Oeonia J. Lindley, 1824 (name verified source)
Aeridachnanathe L.A. Garay & H.R. Sweet in C.L. Withner, 1974 accepted as Aeridachnanthe L.A. Garay & H.R. Sweet in C.L. Withner, 1974 (basis of record)
Aeridachnanathe L.A. Garay & H.R. Sweet in C.L. Withner, 1974 accepted as Aeridachnanthe L.A. Garay & H.R. Sweet in C.L. Withner, 1974 (name verified source)
Agardia S.F. Gray, 1821 accepted as Mougeotia C.A. Agardh, 1824 (name verified source)
Agardia S.F. Gray, 1821 accepted as Mougeotia C.A. Agardh, 1824 (basis of record)
Agataeha Cassini, 1815 (basis of record)
Agataeha Cassini, 1815 (name verified source)
Agyneja Linnaeus, 1771 (name verified source)
Agyneja Linnaeus, 1771 (basis of record)
Akiyamae B.V. Skvortzov & M. Noda, 1981 (basis of record)
Akiyamae B.V. Skvortzov & M. Noda, 1981 (name verified source)
Akrokorion Adanson, 1763 accepted as Galanthus Linnaeus, 1753 (basis of record)
Akrokorion Adanson, 1763 accepted as Galanthus Linnaeus, 1753 (name verified source)
Alchorneaephyllum K. Rásky, 1966 † (name verified source)
Alchorneaephyllum K. Rásky, 1966 † (basis of record)
Alchorneaephyllum K. Rásky, 1966 † (extant flag source)
Almyra R.A. Salisbury, 1866 (extant flag source)
Almyra R.A. Salisbury, 1866 (basis of record)
Almyra R.A. Salisbury, 1866 (name verified source)
Alterbia J.K. Lentin & G.L. Williams, 1977 † accepted as Alterbidinium J.K. Lentin & G.L. Williams, 1985 † (basis of record)
Alterbia J.K. Lentin & G.L. Williams, 1977 † accepted as Alterbidinium J.K. Lentin & G.L. Williams, 1985 † (name verified source)
Alterbia J.K. Lentin & G.L. Williams, 1977 † accepted as Alterbidinium J.K. Lentin & G.L. Williams, 1985 † (extant flag source)
Amphorotia D.M. Williams & G. Reid, 2006 † (basis of record)
Amphorotia D.M. Williams & G. Reid, 2006 † (extant flag source)
Amphorotia D.M. Williams & G. Reid, 2006 † (name verified source)
Anaxis (Ehrenberg) L. Agassiz, 1843 (basis of record)
Anaxis (Ehrenberg) L. Agassiz, 1843 (name verified source)
Anaxis (Ehrenberg) L. Agassiz, 1843 (extant flag source)
Anecochilus Blume, 1825 accepted as Anoectochilus Blume, 1825 (basis of record)
Anecochilus Blume, 1825 accepted as Anoectochilus Blume, 1825 (name verified source)
Anemopaegmia C.F.P. Martius ex C.F. Meisner, 1840 accepted as Anemopaegma C.F.P. Martius ex C.F. Meisner, 1840 (basis of record)
Anemopaegmia C.F.P. Martius ex C.F. Meisner, 1840 accepted as Anemopaegma C.F.P. Martius ex C.F. Meisner, 1840 (name verified source)
Aneurianna L.E. Phillips, 2006 (extant flag source)
Aneurianna L.E. Phillips, 2006 (basis of record)
Aneurianna L.E. Phillips, 2006 (name verified source)
Anisodromum G.R. Upchurch & D.L. Dilcher, 1990 † (basis of record)
Anisodromum G.R. Upchurch & D.L. Dilcher, 1990 † (name verified source)
Anisodromum G.R. Upchurch & D.L. Dilcher, 1990 † (extant flag source)
Antennula Fries ex Strauss, 1850 (name verified source)
Antennula Fries ex Strauss, 1850 (basis of record)
Anthrophyum Kaulfuss, 1824 (basis of record)
Anthrophyum Kaulfuss, 1824 (name verified source)
Anticamonas B.V. Skvortzov, 1971 (name verified source)
Anticamonas B.V. Skvortzov, 1971 (basis of record)
Anticapipollis S. Ouyang, 1979 † (basis of record)
Anticapipollis S. Ouyang, 1979 † (name verified source)
Anticapipollis S. Ouyang, 1979 † (extant flag source)
Apatoselis L.A. Garay, 1980 accepted as Stelis O. Swartz, 1800 (name verified source)
Apatoselis L.A. Garay, 1980 accepted as Stelis O. Swartz, 1800 (basis of record)
Aplolophium Chamisso, 1832 accepted as Haplolophium Chamisso, 1832 accepted as Amphilophium Kunth, 1818 (basis of record)
Aplolophium Chamisso, 1832 accepted as Haplolophium Chamisso, 1832 accepted as Amphilophium Kunth, 1818 (name verified source)
Aplophyllum A.H.L. Jussieu, 1825 (basis of record)
Aplophyllum A.H.L. Jussieu, 1825 (name verified source)
Aplotella (Kützing) L. Agassiz, 1843 (extant flag source)
Aplotella (Kützing) L. Agassiz, 1843 (basis of record)
Aplotella (Kützing) L. Agassiz, 1843 (name verified source)
Appendicisporis S.I. Saad & G. Ghazaly, 1976 † (basis of record)
Appendicisporis S.I. Saad & G. Ghazaly, 1976 † (name verified source)
Apterosoma S. Komura, 1997 † (basis of record)
Apterosoma S. Komura, 1997 † (extant flag source)
Apterosoma S. Komura, 1997 † (name verified source)
Apuleja C.F.P. Martius, 1837 (basis of record)
Apuleja C.F.P. Martius, 1837 (name verified source)
Arachnaria D.L. Szlachetko, 2003 (name verified source)
Arachnaria D.L. Szlachetko, 2003 (extant flag source)
Arachnaria D.L. Szlachetko, 2003 (basis of record)
Araniscus S. Komura, 1998 † (name verified source)
Araniscus S. Komura, 1998 † (extant flag source)
Araniscus S. Komura, 1998 † (basis of record)
Araucariophyton V.G. Lepechina & A.N. Olejnikov, 1978 † (extant flag source)
Araucariophyton V.G. Lepechina & A.N. Olejnikov, 1978 † (name verified source)
Araucariophyton V.G. Lepechina & A.N. Olejnikov, 1978 † (basis of record)
Araucaroxylon Kraus in W.P. Schimper, 1870 † (basis of record)
Araucaroxylon Kraus in W.P. Schimper, 1870 † (name verified source)

 Taxonomic remark

 for Testudomyces M. Solé, J. Cano & J. Guarro in M. Solé et al., 2002

Authority given in Index Nominum Genericorum as M. Solé, J. Cano et J. Guarro in M, Solé et al., in Index ... [details]