• Astragalus Linnaeus, 1753 [Family: Fabaceae]
• Astragalus Ostergaard, 1935 accepted as Astralium Link, 1807 [Family: Turbinidae]
• Astragalus aaronsohnianus Eig accepted as Astragalus brachystachys DC.
• Astragalus abbas-riazi Parsa accepted as Astragalus oxyglottis M. Bieb.
• Astragalus abbreviatus Kar. & Kir.
• Astragalus abnormalis Rech. f.
• Astragalus abolinii Popov
• Astragalus aboriginum sensu auct. accepted as Astragalus tolmaczevii Jurtzev
• Astragalus aboriginum Spreng.
• Astragalus abramovii Gontsch. accepted as Astragalus pseudobrachytropis Gontsch.
• Astragalus abruptus Krytzka
• Astragalus absentivus Maassoumi
• Astragalus abyssinicus Hochst. accepted as Astragalus atropilosulus (Hochst.) Bunge
• Astragalus abyssinicus sensu Cronquist, p.p. accepted as Astragalus atropilosulus (Hochst.) Bunge
• Astragalus acantherioceras Rech. f. & Koie
• Astragalus acanthocarpus Boriss.
• Astragalus acanthochristianopsis Rech. f. & Koie
• Astragalus acaulis Baker
• Astragalus accidens S. Watson
• Astragalus accumbens E. Sheld.
• Astragalus acerbus E. Sheld. accepted as Astragalus wingatanus S. Watson
• Astragalus acetabulosus C.C. Towns. accepted as Astracantha acetabulosa (C.C. Towns.) Podlech
• Astragalus achtalensis Conrath & Freyn accepted as Astragalus stevenianus DC.
• Astragalus achundovii B. Fedtsch.
• Astragalus acinaciferus Boiss. accepted as Astragalus dactylocarpus Boiss.
• Astragalus aciphyllus Freyn accepted as Astragalus tricholobus DC.
• Astragalus ackerbergensis Freyn & Sint.
• Astragalus ackermanii Barneby
• Astragalus acmophyllus Bunge accepted as Astracantha acmophylla (Bunge) Podlech
• Astragalus aconcaguensis Speg. accepted as Astragalus berterianus (Moris) Reiche
• Astragalus acormosus Basil.
• Astragalus aculeatus A. Nelson accepted as Astragalus kentrophyta A. Gray
• Astragalus acutifolius Bunge
• Astragalus acutirostris S. Watson
• Astragalus acutus Bunge accepted as Astragalus susianus Boiss.
• Astragalus adanus A. Nelson
• Astragalus adesmiaefolius Bunge accepted as Astragalus hoffmeisteri (Klotzsch) Ali
• Astragalus adesmifolius Bunge accepted as Astragalus hoffmeisteri (Klotzsch) Ali
• Astragalus adpresse-pilosus Gontsch. accepted as Astragalus adpressipilosus Gontsch.
• Astragalus adpressipilosus Gontsch.
• Astragalus adraskanensis Podlech accepted as Astragalus gompholobium Bunge
• Astragalus adscendens Boiss. & Hausskn. accepted as Astracantha adscendens (Boiss. & Hausskn.) Podlech
• Astragalus adsurgens Pall.
• Astragalus adulterinus Podlech
• Astragalus aduncus Willd.
• Astragalus adzharicus Popov
• Astragalus aegacanthoides R. Parker
• Astragalus aegiceras Willd. accepted as Astragalus trimestris Linnaeus
• Astragalus aegobromus Boiss. & Hohen.
• Astragalus aegyptiacus Mill. accepted as Astragalus hamosus Linnaeus
• Astragalus aegyptiacus Spreng. accepted as Astragalus kahiricus DC.
• Astragalus aeluropus Bunge
• Astragalus aemulans (Nevski) Gontsch.
• Astragalus aequalis Clokey
• Astragalus affganus Boiss. accepted as Astragalus affghanus Boiss.
• Astragalus affghanus Boiss.
• Astragalus affinis Steud. accepted as Astragalus edmondstonei (Hook. f.) Robinson
• Astragalus afganicus Bornm. accepted as Astragalus affghanus Boiss.
• Astragalus afghanicus Bornm. accepted as Astragalus affghanus Boiss.
• Astragalus afghanomontanus Sirj. & Rech. f.
• Astragalus aflatunensis B. Fedtsch.
• Astragalus africanus Bunge accepted as Astragalus alopecuroides Linnaeus
• Astragalus agameticus Lipsky
• Astragalus agassii Manden.
• Astragalus agnicidus Barneby
• Astragalus agninus Jeps. accepted as Astragalus lentiginosus Hook.
• Astragalus agraniotii Boiss.
• Astragalus agrestis G. Don
• Astragalus agrestis Hook. accepted as Astragalus danicus Retz.
• Astragalus aharicus Maassoumi & Podlech
• Astragalus ahmad-adlii Bornm. & Gauba accepted as Astragalus ahmed-adlii Bornm. & Gauba
• Astragalus ahmed-adlii Bornm. & Gauba
• Astragalus ahouicus Parsa
• Astragalus aitchisonii Baker accepted as Ophiocarpus aitchisonii (Baker) Podlech
• Astragalus aitchisonii Sirj. & Rech. f. accepted as Astragalus macropelmatus Bunge
• Astragalus aitosensis Ivan. accepted as Astracantha arnacantha (M. Bieb.) Podlech
• Astragalus aiwadzhi B. Fedtsch.
• Astragalus aiwadzhii B. Fedtsch.
• Astragalus ajfreidii Aitch. & Baker
• Astragalus ajubensis Bunge
• Astragalus akkensis Coss.
• Astragalus aksaicus Schischkin
• Astragalus aksaricus Pavlov
• Astragalus aksuensis Bunge
• Astragalus aktauensis Gontsch.
• Astragalus alaarczensis Vassilcz.
• Astragalus alabugensis B. Fedtsch.
• Astragalus alaicus Freyn
• Astragalus alamliensis Rech. f.
• Astragalus alaschanensis H.C. Fu
• Astragalus alaschanus Maxim.
• Astragalus alatavicus Kar. & Kir.
• Astragalus albanicus Grossh.
• Astragalus albanicus Sirj. accepted as Astracantha rumelica (Bunge) Reer & Podlech
• Astragalus albatus E. Sheld. accepted as Astragalus aridus A. Gray
• Astragalus albens Greene
• Astragalus alberjilla Steud. accepted as Astragalus berteri Colla
• Astragalus albertii Bunge
• Astragalus albertinus (Greene) Tiderstr. accepted as Oxytropis campestris (L.) DC.
• Astragalus albertoregelia C. Winkl. & B. Fedtsch.