Overview Note
Astragalus alienus Gray, U.S. Expl. Exped., Phan. 1: 418. 1854.
Astragalus amatus Clos, Flora Chilena 2(1): 115–116. 1846.
Astragalus ameghinoi Spegazzini, Anales Museo Naci. de His. Nat. de Buenos Aires. Ser. 3 7: 262. 1902.
Astragalus anni-novi Burkart, Darwiniana 15(3–4): 530, f. 9, 10. 1969.
Astragalus arequipensis Vogel, Nova Acta Phys.-med. Acad. Caes. Leop.-Carol. Nat. Cur. Exhibentia Ephemerides sive Obs. Hist. Experimenta 19(Suppl. 1): 17. 1843. 2n=24, (N+)
Astragalus argentinus Manganaro, Anales de la Sociedad Científica Argentina 87: 145, f. 14. 1919.
Astragalus arnottianus (Gillies) Reiche, Anales Univ. Chile 97: 561. 1897. (N+)
Astragalus asplundii Johnston, Journal of the Arnold Arboretum 28(3): 366. 1947.
Astragalus austroargentinus Gómez-Sosa, Darwiniana 20(1–2): 220–224, f. 5–6. 1976.
Astragalus bellus (Kuntze) Fries, Nova Acta Regiae Soc. Sci. Upsal., ser. 2 1(1): 135. 1905. 2n=26
Astragalus bergii Hieron.,  Bol. AcAstragalus Nac. Ci., Córdoba, Argentina 3: 343. 1879. 2n=26, (N+)
Astragalus berteri Colla, ?????
Astragalus berterianus (Moris) Reiche.
Astragalus boelckei Gómez-Sosa, Parodiana 7(1–2): 35–37, f. 1. 1992.
Astragalus bonariensis Gómez-Sosa, Darwiniana 22: 358, f. sn. 1979.
Astragalus brackenridgei Gray, United States Exploring Expedition 1: 416. 1854.
Astragalus brevidentatus Wright, Bull. Misc. Inform. Kew 1906: 200. 1906.
Astragalus burkartii Johnston, Journal of the Arnold Arboretum 28(3): 364. 1947.
Astragalus bustillosii Clos, Flora Chilena 2(1): 117–118. 1846. (N+)
Astragalus cachinalensis Philippi, Florula Atacamensis seu Enumeriatio 15. 1860.
Astragalus cajamarcanus Gómez-Sosa, Darwiniana 48(2): 175–176. 2010.  Peru, 2010.
Astragalus carinatus (H. & Astragalus) Reiche, Anales de la Universidad de Chile 97: 557. 1897. 2n=26, (N+)
Astragalus chamissonis (Vogel) Reiche, Anales Univ. Chile 97: 553. 1897. (N+)
Astragalus chubutensis Spegazzini, Anales Museo Nac. Hist. Nat. Buenos Aires. Ser. 3 7: 266. 1902.
Astragalus cochabambensis Gómez-Sosa, Arnaldoa 11(1): 29–44. 2004. Bolivia.
Astragalus colhuensis Gómez-Sosa, Darwiniana 24: 28, f. 3. 1982.
Astragalus complicatus Gillies ex Hooker & Arnott, Botanical Miscellany 3: 187. 1833.
Astragalus confinis Johnston, Journal of the Arnold Arboretum 28(4): 398–399. 1947.
Astragalus coquimbensis (H. & Astragalus) Reiche, Anales de la Universidad de Chile 97: 566. 1897.
Astragalus cracca DC., Astragalogia 101, pl. 9. 1802.
Astragalus cruckshanksii (H. & Astragalus) Grisebach, Anales Univ. Chile 97: 558. 1897. 2n=28, (N+)
Astragalus crymophilus Johnston, J. Arnold Arboretum 28(4): 400. 1947.
Astragalus cryptanthus Weddell, Chloris Andina 2: 259. 1861.
Astragalus crypticus Johnston, J. Arnold Arboretum 28(3): 365. 1947. 2n=22, (N+)
Astragalus cryptobotrys Johnston, J. Arnold Arboretum 28(3): 365. 1947. (N+)
Astragalus curvicaulis (Clos) Reiche, Anales de la Universidad de Chile 97: 559. 1897.
Astragalus cuyanus Gómez-Sosa, Darwiniana 24: 27, f. sn. 1982. (N+)
Astragalus darumbium (Bertero) Clos, Flora Chilena 2: 112. 1846. 2n=22
Astragalus deminutivus Johnston, J. Arnold Arbor. 28(4): 406–407. 1947.
Astragalus dielsii Macbride, Publ. Field Mus. Nat. Hist., Bot. Series 11(1): 24–25. 1931.
Astragalus dillinghami Macbride, Publ. Field Mus. Nat. Hist., Bot. Series 8(2): 98–99. 1930.
Astragalus distinens Macloskie, Rep. Princeton Univ. Exped. Patago., Vol. 8, 1,2, Botany 8: 505. 1904. 2n=26, (N+)
Astragalus dodti Philippi, Linnaea 33: 48. 1864.
Astragalus domeykoanus (Phil.) Reiche, Anales Univ. Chile 97: 550. 1897. (N+)
Astragalus edmonstonei (Hook.) Robinson, Proc. Amer. Acad. of Arts and Sciences 38: 148. 1902.
Astragalus fabrisii Gómez-Sosa, Darwiniana 23(2–4): 507–508. 1981.
Astragalus famatinae Johnston, J. Arnold Arboretum 28(4): 393–394. 1947.,  2n=22, (N+)
Astragalus flavocreatus Johnston, J. Arnold Arboretum 28(4): 405–406. 1947. 2n=24, (N+)
Astragalus garbancillo Cavanilles, Icon. 1: 59, pl. 85. 1791. 2n=26, (N+)
Astragalus geminiflorus Humb. & Bonpl., Plantae Aequinoctiales 1: 128, pl. 37. 1808.
Astragalus germaini Philippi, Linnaea 28: 621. 1856.
Astragalus gruinus Barneby, Memoirs New York Botanical Garden 13: 846–849. 1964. 2n=22
Astragalus hickenii Gómez-Sosa, Hickenia 2(2): 5–7, f. 1. 1983.
Astragalus hypsogenus Johnston, J. Arnold Arboretum 28(4): 399–400. 1947. (N+)
Astragalus illinii Johnston, Journal of the Arnold Arboretum 28(3): 360. 1947. 2n=26
Astragalus joergensenii Johnston, Journal of the Arnold Arboretum 28(3): 372–373. 1947. 2n=26
Astragalus johnstonii Gómez-Sosa, Gayana, Botánica 54(1): 33. 1997.
Astragalus limariensis Muñoz, Journal of the Arnold Arboretum 20: 246. 1939.
Astragalus looseri Johnston, J. Arnold Arboretum 28(3): 349. 1947.
Astragalus macrocarpus (Phil.) Reiche, Anales Univ. Chile 97: 563. 1897. Homonym
Astragalus magellanicus Gómez-Sosa, Hickenia 1(17): 96–98.1977.
Astragalus maulensis Spegazzini, Anales Mus. Nac. .Hist. Nat. Buenos Aires. Ser. 3 7: 264. 1902.
Astragalus micranthellus Weddell, Chloris Andina 2: 262. 1861. (N+)
Astragalus minimus Vogel, Nova Acta Phys.-Med. Acad. Caes. Leop.-Carol. Nat. Cur. 19(Suppl. 1): 18. 1843.
Astragalus minutissimus Weddell, Chlor. Andina 2: 257–258. 1861.
Astragalus monteroi Johnston, J. Arnold Arboretum 28(4): 375. 1947.
Astragalus monticola Philippi, Linnaea 33: 47. 1868.
Astragalus moyanoi Spegazzini, Revista Fac. Agron. Univ. Nac. La Plata 3: 601. 1897. 2n=28
Astragalus nelidae Gómez-Sosa, Bol. Soc. Argent. Botánica 25(3–4): 485–488. 1988. 2n=26
Astragalus neobarnebyanus Gómez-Sosa, Brittonia 38(4): 427–429, f. 1. 1986.
Astragalus neoburkartianus Gómez-Sosa, Darwiniana 20(1–2): 213–218.1976.
Astragalus neocarpus Gómez-Sosa, Brittonia 49(4): 537. 1997.
Astragalus neuquenensis Gómez-Sosa, Darwiniana 20(1–2): 218–220, f. 3–4. 1976. 2n=28
Astragalus nicorae Gómez-Sosa, Darwiniana 24: 23–25. 1982.
Astragalus nivicola Gómez-Sosa, Hickenia 1(17): 93–94. 1977.
Astragalus nudus Clos, Fl. Chil. 2(1): 115. 1846.
Astragalus orthocarpus Johnston, J. Arnold Arbor. 28(4): 387. 1947. Nom. Inval., need new epithet!
Astragalus palenae (Phil.) Reiche, Anales Univ. Chile 97: 542. 1897. n=13, (N+)
Astragalus paposanus Johnston, Cont. Gray Herb. Harvard Univ. 85: 51. 1929.
Astragalus parodii Johnston, J. Arnold Arboretum 28(3): 371–372. 1947. (N+)
Astragalus patagonicus (Phil.) Spegazzini, Rev. Fac. Agron. Univ. Nac. La Plata 3: 505. 1897. (N+)
Astragalus pauranthus Johnston, J. Arnold Arboretum 28(3): 373. 1947. (N+)
Astragalus pehuenches Niederlein, Exp. Río Negro, Bot. 2: 206, pl. 4. 1881. 2n=22, (N+)
Astragalus peruvianus Vogel, Nova Acta Physico-medica Acad. Caes. Leopoldino-Carolinae Nat. Cur. Exh. Ephemerides sive Obser. Hist. et Exp. 19(Suppl. 1): 18. 1843. 2n=22, (N+)
Astragalus pickeringii Gray, U.S. Expl. Exped., Phan. 1: 415. 1854.
Astragalus pissisi (Phil.) Johnston, J. Arnold Arboretum 28(3): 347. 1947.
Astragalus pulviniformis Johnston, Physis. Revista Soc. Argentina Cie. Nat. 9: 309. 1929.
Astragalus punae Johnston, J. Arnold Arboretum 28(4): 389–390. 1947.
Astragalus pusillus Vogel, Nova Acta Physico-medica Acad. Caes. Leopoldino-Carolinae Nat. Cur. Exh. Ephemerides sive Obser. Hist. et Exp. 19(Suppl. 1): 19. 1843.
Astragalus richii Gray, United States Exploring Expedition 1: 414. 1854.
Astragalus romasanus Ulbrich, Bot. Jah. Syst., Pflanzengeschichte und Pflanzengeographie 37: 421. 1906.
Astragalus ruiz-lealii Johnston, J. Arnold Arboretum 28(3): 373–374. 1947.
Astragalus sagasteguii Gómez-Sosa, Novon 15(4): 542, 544. 2005.
Astragalus sanctae-crucis Spegazzini, Rev. fac. de agr.; univ. nac. La Plata 3: 505. 1897. (N+)
Astragalus spegazzinii Johnston, J. Arnold Arboretum 28(3): 370. 1947.
Astragalus sprucei Johnston, J. Arnold Arboretum 19(1): 88. 1938.
Astragalus tacorensis Gomez-Sosa, Novon 20(2): 157–161. 2010.
Astragalus tarijensis Weddell, Chloris Andina 2: 262. 1861. (N+)
Astragalus tehuelches Spegazzini, Anales Mus. Nac. .Hist. Nat. . Buenos Aires. Ser. 3 7: 266. 1902.
Astragalus triflorus (DC.) Gray, Smithsonian Contr. Knowl. 5(6): 45. 1853.
Astragalus uniflorus DC., Astragalogia 243, pl. 50. 1802. (N+)
Astragalus urbanianus Ulbrich, Bot. Jah. .Syst., Pflanzengeschichte und Pflanzengeographie 37: 422. 1906.
Astragalus vagus (Clos) Reiche, Anales Univ. Chile 97: 563. 1897.
Astragalus valerianensis Johnston, Cont. Gray Herb. of Harvard University 85: 166. 1929.
Astragalus valparadisiensis Spegazzini, Anales Mus. Nac. Hist. Nat. Buenos Aires. Ser. 3 7: 264. 1902.
Astragalus venturii Johnston, J. Arnold Arboretum 28(4): 398. 1947.
Astragalus verticillatus (Phil.) Reiche, Anales Univ. Chile 97: 543. 1897.
Astragalus vesiculosus Clos, Fl. Chil. 2(1): 120. 1846. (N+)
Astragalus weberbaueri Ulbrich, Bot. Jah. .Syst., Pflanzengeschichte und Pflanzengeographie 37: 419. 1906.
Astragalus weddellianus (Kuntze) Johnston, J. Arnold Arboretum 28(4): 395. 1947.
Astragalus werdermanni Johnston, J. Arnold Arboretum 28(4): 403. 1947.

Overview Note
Astragalus albulus Wooton & Standl., Cont. United States National Herbarium 16(4): 136. 1913.  n=11

Overview Note
Astragalus ampullarius S. Watson, American Naturalist 7(5): 300. 1873.
Astragalus ampullarioides (S. L. Welsh) S. L. Welsh, Great Basin Naturalist 58(1): 51. 1998.

Overview Note
Astragalus anemophilus Greene, Bull. . California Academy of Sciences 1(4A): 186–187. 1885.
Astragalus harrisonii Barneby, Memoirs of The New York Botanical Garden 13: 270–271, map 24. 1964.
Astragalus miguelensis Greene, Pittonia 1(3): 33. 1887. 2n=22

Overview Note
Astragalus commixtus Bunge see Old World list , Introduced

Overview Note
Astragalus annularis Forsskal. 2n=14, 16, 24, (N-) , see Old World list, Introduced
Astragalus campylorrhynchus Fisch. & C.A. Mey. n= 8; 2n= 16, (N+) , see Old World list, Introduced

Overview Note
Astragalus accumbens Sheldon, Minnesota Botanical Studies 1(1): 20. 1894.

     Synonyms: Astragalus missouriensis var. accumbens (Sheldon) Isely.
Astragalus amphioxys A. Gray var. amphioxys

Synonyms: Astragalus amphioxys var. melanocalyx (Rydb.) Tidestrom.

 2n=22
Astragalus amphioxys A. Gray var. modestus Barneby, Leafl. W. Bot. 9(6): 89. 1960.
Astragalus amphioxys A. Gray var. musimonum (Barneby) Barneby, Intermount. Fl. 3(B): 138. 1989.

    Synonyms: Astragalus musimonum Barneby.
Astragalus amphioxys A. Gray var. vespertinus (Sheldon) M.E. Jones, Rev. N.-Amer. Astragalus 215. 1923.
Astragalus anisus M.E. Jones, Zoë 4(1): 34. 1893.
Astragalus anserinus N. D. Atwood et al., Great Basin Naturalist 44(2): 263–264. 1984.
Astragalus argophyllus Nuttall var. alvius S. L. Welsh, N. Amer. Sp. Astragalus 204. 2007.
Astragalus argophyllus Nuttall var. argophyllus.

   Synonyms: Astragalus Xylophacos argophyllus (Nutt.) Rydb.

Astragalus argophyllus var. argophyllus;
Astragalus argophyllus Nuttall var. martinii M.E. Jones, Rev. N.-Amer. Astragalus 207.1923.

   Synonyms: Astragalus argophyllus var. pephragmenoides Barneby.

 2n=22
Astragalus argophyllus Nuttall var. panguicensis (M.E. Jones) M.E. Jones, Contr. W. Bot. 8: 5. 1898.

   Synonyms: Astragalus panguicensis (M.E. Jones) M.E. Jones.
Astragalus argophyllus Nuttall var. stocksii ( Welsh)Barneby ex Isely.

   Synonyms: Astragalus henrimontanensis Welsh.

Astragalus stocksii Welsh, non Benth. ex Bunge.
Astragalus callithrix Barneby, Leaflets of Western Botany 3(5): 103–105. 1942.
Astragalus castaneiformis S. Watson, Proc. Amer. Acad. Arts 20: 361. 1885.
Astragalus castaneiformis S. Watson var. castaneiformis.

    Synonyms: Astragalus castaneiformis var. typicus Barneby.
Astragalus castaneiformis S. Watson var. consobrinus Barneby, Amer. Midl. Naturalist 41(2): 496–497. 1949.
Astragalus chamaeleuce A. Gray, Rep. Colorado R. 4: 10. 1861.
Astragalus chamaeleuce A. Gray var. chamaeleuce. 2n=22
Astragalus chamaeleuce A. Gray var. laccoliticus (M.E. Jones) Jones ex Rydb., N. Amer. Fl. 24(5): 300. 1929.
Astragalus coccineus (Parry) Brandegee, Zoë 2(1): 72. 1891.

    Synonyms: Astragalus purshii var. coccineus Parry.

 2n=22
Astragalus columbianus Barneby, Memoirs of The New York Botanical Garden 13: 649–650. 1964.
Astragalus consobrinus (Barneby) S. L. Welsh, Great Basin Naturalist 38(3): 271. 1978.

    Synonyms: Astragalus castaneiformis var. consobrinus Barneby.
Astragalus cyaneus A. Gray, Mem. Amer. Acad. Arts, n.s. 4(1): 34. 1949. n=11
Astragalus cymboides M.E. Jones, Pro. Calif. Acad. Sci., Series 2, 5(18): 650–652. 1895. 2n=24
Astragalus desereticus Barneby, Memoirs of The New York Botanical Garden 13: 634–636. 1964.
Astragalus eurekensis M.E. Jones, Cont. Western Botany 8: 12. 1898.
Astragalus eurylobus (Barneby) Barneby, Brittonia 36(2): 169. 1984.

     Synonyms: Astragalus tephrodes var. eurylobus Barneby.
Astragalus feensis M.E. Jones, Cont. Western Botany 8: 20. 1898.

    Synonyms: Astragalus sanctae-fidei Tidestrom.
Astragalus funereus M.E. Jones, Cont. Western Botany 12: 11–12. 1908.
Astragalus holmgreniorum Barneby, Brittonia 32(1): 24–26, f. 1. 1980. 2n=22
Astragalus inflexus Dougl. ex Hook., Fl. Bor.-Amer. 1(3): 151. 1831. 2n=22
Astragalus iodopetalus (Rydberg) Barneby, Amer. Midl. Naturalist 37(2): 471.1947.
Astragalus leucolobus S. Wats. ex M.E. Jones, Zoë 4(3): 270–271. 1893.
Astragalus loanus Barneby, Memoirs of The New York Botanical Garden 13: 662. 1964.

   Synonyms: Astragalus newberryi var. wardianus Barneby.
Astragalus missouriensis Nuttall, Gen. N. Amer. Pl. 2: 99. 1818.
Astragalus missouriensis Nuttall var. missouriensis.

    Synonyms: Astragalus xylophacos missouriensis (Nutt.) Rydb.

 2n=22
Astragalus missouriensis Nuttall var. amphibolus Barneby, Amer. Midl. Naturalist 37(2): 447–448. 1947.
Astragalus missouriensis Nuttall var. humistratus Isely, Syst. Bot. 8(4): 423. 1983.
Astragalus missouriensis Nuttall var. mimetes Barneby, Mem. New York Bot. Gard. 13: 716. 1964.
Astragalus musiniensis M.E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 671–672. 1895.
Astragalus neomexicanus Wooton & Standley, Cont. ., U. S. National Herbarium 16(4): 136–137. 1913. n=11, 2n=22
Astragalus newberryi A. Gray, Proc. Amer. Acad. Arts 12: 55. 1878.
Astragalus newberryi A. Gray var. newberryi.
Astragalus newberryi A. Gray var. aquarii Isely, Syst. Bot. 8(4): 423–424. 1983.
Astragalus newberryi A. Gray var. blyae (Rose ex Rydb.) Barneby, Amer. Midl. Naturalist 37(2): 480. 1947.

    Synonyms: Astragalus blyae (Rose ex Rydb.) Tidestrom.
Astragalus newberryi A. Gray var. castoreus M.E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 658. 1895.
Astragalus newberryi A. Gray var. escalantinus Barneby, Intermount. Fl. 3(B): 128–129. 1989.
Astragalus nudisiliquus A. Nelsson, Bot. Gazette 54(5): 410–411.1912.
Astragalus parryi A. Gray, Amer. J. Sci. Arts, ser. 2 33(99): 410–411. 1862.
Astragalus phoenix Barneby, Madroño 20(8): 395–398. 1971.
Astragalus piscator Barneby &S. L. Welsh, Great Basin Naturalist 45(3): 551–552. 1985.
Astragalus piutensis Barneby & Mabberley, Taxon 34(3): 453. 1985.

    Synonyms: Astragalus marianus (Rydb.) Barneby, non Huber.
Astragalus purshii Dougl. ex Hook., Gen. Hist. 2: 271. 1832.
Astragalus purshii Dougl. ex Hook. var. purshii.

    Synonyms: Astragalus incurvus (Rydb.) Abrams.

Astragalus purshii var. interior M.E. Jones.

 2n=22, 24
Astragalus purshii Dougl. ex Hook. var. concinnus Barneby, Leafl. W. Bot. 4(9): 231–232. 1946.
Astragalus purshii Dougl. ex Hook. var. glareosus (Dougl. ex Hook.) Barneby, Amer. Midl. Naturalist 37(2): 503.1947.

    Synonyms: Astragalus glareosus Dougl. ex Hook.

Astragalus ventosus Suksdorf ex Rydb.
Astragalus purshii Dougl. ex Hook. var. lagopinus (Rydb.) Barneby, Amer. Midl. Naturalist 37(2): 511.1947.

    Synonyms: Astragalus lagopinus Rydb. M.E. Peck.
Astragalus purshii Dougl. ex Hook. var. lectulus (S. Wats.) M.E. Jones, Contr. W. Bot. 10: 61. 1902.

    Synonyms: Astragalus jonesii Abrams.

Astragalus lectulus S. Wats.
Astragalus purshii Dougl. ex Hook. var. ophiogenes (Barneby) Barneby et al., Vasc. Pl. Pacif. N.W. 3: 256. 1961.

    Synonyms: Astragalus ophiogenes Barneby.
Astragalus purshii Dougl. ex Hook. var. pumilio Barneby, Amer. Midl. Naturalist 37(2): 506–507. 1947.
Astragalus purshii Dougl. ex Hook. var. tinctus M.E. Jones, Zoë 4(3): 269. 1893.

    Synonyms: Astragalus candelarius Sheldon.

Astragalus leucolobus ssp. consectus (Sheldon) Abrams.

Astragalus purshii var. longilobus M.E. Jones.
Astragalus shortianus Nuttall, Fl. N. Amer. 1(2): 331. 1838. 2n=24?
Astragalus subvestitus (Jepson) Barneby, American Midland Naturalist 37(2): 514. 1947.
Astragalus tephrodes A. Gray, Smithsonian Contr. Knowl. 5(6): 45. 1853.
Astragalus tephrodes A. Gray var. tephrodes.

    Synonyms: Astragalus tephrodes var. typicus Barneby.

 2n=22
Astragalus tephrodes A. Gray var. brachylobus (Gray) Barneby, Amer. Midl. Naturalist 37(2): 466. 1947.

    Synonyms: Astragalus arrectus var. pephragmenus (M.E. Jones) M.E. Jones.
Astragalus tephrodes A. Gray var. chloridae (M.E. Jones) Barneby, Mem. New York Bot. Gard. 13: 642.1964.
Astragalus tephrodes A. Gray var. remulcus (Gray) Barneby, ????
Astragalus tidestromii (Rydberg) Clokey, Madroño 6(7): 214. 1942.
Astragalus uncialis Barneby, Leaflets of Western Botany 3(5): 101–103. 1942.
Astragalus utahensis (Torrey) Torrey & A. Gray, Pacif. Railr. Rep. 2(1): 120. 1857. 2n=22
Astragalus waterfallii Barneby, Leaflets of Western Botany 7(2): 31–33. 1953. n=11
Astragalus welshii Barneby, Intermountain Flora 3(B): 130. 1989.
Astragalus zionis M.E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 652–653. 1895.
Astragalus zionis M.E. Jones var. zionis. 2n=22
Astragalus zionis M.E. Jones var. vigulus Welsh, Rhodora 95(883-884): 404. 1993.

Overview Note
Astragalus leptaleus A. Gray, Proc. American Academy of Arts and Sciences 6: 220. 1864.

Overview Note
Astragalus atratus S. Wats., Botany 69. 1871.
Astragalus atratus S. Wats. var. atratus.
Astragalus atratus S. Wats. var. inseptus Barneby, Vasc. Pl. Pacif. N.W. 3: 220. 1961.
Astragalus atratus S. Wats. var. mensanus M.E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 6651895.

    Synonyms: Astragalus mensanus (M.E. Jones) Abrams.
Astragalus atratus S. Wats. var. owyheensis (A. Nels. & J.F. Macbr.) M.E. Jones, Rev. N.-Amer. Astragalus 182. 1923.

    Synonyms: Astragalus owyheensis A. Nels. & J.F. Macbr.
Astragalus salmonis M.E. Jones, Contributions to Western Botany 8: 9–10. 1898.

Overview Note
Astragalus bicristatus A. Gray, Proc. Amer. Acad. Arts 19: 75–76. 1883.
Astragalus ertterae Barneby & Shevock, Aliso 11(4): 585–587, f. 1. 1987.
Astragalus webberi A. Gray ex Brewer & S. Wats., Bot. California 1: 154–1551876.

Overview Note
Astragalus bisulcatus (Hook.) A. Gray, Pacif. Railr. Rep. 12(2): 42. 1860.
Astragalus bisulcatus (Hook.) A. Gray var. bisulcatus.

    Synonyms: Astragalus diholcos Tidestrom.

Diholcos bisulcatus (Hook.) Rydb.

 2n= 24, (Se), (N+)
Astragalus bisulcatus (Hook.) A. Gray var. haydenianus (Gray) Barneby, Mem. New York Bot. Gard. 13: 413. 1964.

    Synonyms: Astragalus bisulcatus ssp. haydenianus (Gray) W.A. Weber.

Astragalus haydenianus Gray, 2n=44.
Astragalus bisulcatus (Hook.) A. Gray var. major (M.E. Jones) Welsh, Great Basin Naturalist 38(3): 266. 1978.

    Synonyms: Astragalus haydenianus var. major M.E. Jones.
Astragalus bisulcatus (Hook.) A. Gray var. nevadensis (M.E. Jones) Barneby, Leafl. W. Bot. 7(8): 195. 1954.
Astragalus racemosus Pursh, Fl. Amer. Sept. 2: 740. 1813.
Astragalus racemosus Pursh var. racemosus 2n=24, n=11, (Se)
Astragalus racemosus Pursh var. longisetus M.E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 663. 1895.
Astragalus racemosus Pursh var. treleasei C.L. Porter, Madroño 8(3): 99–100. 1945.

Overview Note
Astragalus brauntonii Parish, Bull. Southern Calif. Acad. Sci. 2(2): 26, pl. 1. 1903.

Overview Note
Astragalus camptopus Barneby, Leaflets of Western Botany 4(9): 228–230. 1946.

Overview Note
Astragalus americanus (Hooker) M. E. Jones, Contr. W. Bot. 8: 8. 1895. 2n=16, Fl. Panarctic, 2017.
Astragalus frigidus (L.) A.Gray

    Synonyms: Astragalus frigidus var. frigidus.

Astragalus frigidus (L.)A.Gray var. americanus(Hooker) M. E. Jones.

Astragalus frigidus var. gaspensis (Rouss.) Fernald.

Astragalus gaspensis J. Rouss., 2n=16.

Phaca americana (Hook.) Rydb. ex Small.

 3 subspecies shared with Old World.

2n=16, 32 , see Old World list, Introduced
Astragalus umbellatus Bunge 2n=16 ,Origin in Old World, see Old World list, Introduced

Overview Note
Astragalus andersonii A. Gray, Proc. Amer. Acad. Arts 6: 524. 1865. 2n=24
Astragalus austiniae Gray ex Brewer & S. Watson ????
Astragalus caricinus (M.E. Jones) Barneby, American Midland Naturalist 55(2): 502. 1956.

    Synonyms: Astragalus lyallii var. caricinus M.E. Jones.
Astragalus lemmonii A. Gray, Proc. American Acad. of Arts and Sci. 8: 626–627. 1873.
Astragalus lentiformis Gray ex Brewer & S. Watson, Geol. Survey of Calif., Botany 1: 156. 1876.
Astragalus lyallii A. Gray, Proc. Amer. Acad. Arts 6: 195. 1864.
Astragalus sepultipes (Barneby) Barneby, Aliso 4(1): 136. 1958.

    Synonyms: Astragalus andersonii var. sepultipes Barneby.
Astragalus spaldingii A. Gray, Proc. Amer. Acad. Arts 6: 524. 1865. 2n=24
Astragalus tyghensis M.E. Peck, Proc. Biol. Soc. Washington 49(24): 110–111. 1936.

   Synonyms: Astragalus spaldingii var. tyghensis (M.E. Peck) C.L. Hitchc.

Overview Note
Astragalus circumdatus Greene, Pittonia 1(12): 173–174. 1888.

Overview Note
Astragalus collinus (Hook.) Douglas ex G. Don, Gen. Hist. 2: 256. 1832.
Astragalus collinus (Hook.) Douglas ex G. Don var. collinus 2n=24,48
Astragalus collinus (Hook.) Douglas ex G. Don var. laurentii (Rydb.) Barneby, Amer. Midl. Nat. 55(2): 487. 1956.

   Synonyms: Astragalus laurentii (Rydb.) M.E. Peck.
Astragalus curvicarpus (Heller) J.F. Macbride, Contr. Gray Herb. 65: 38. 1922.
Astragalus curvicarpus (Heller) J.F. Macbride var. curvicarpus
Astragalus curvicarpus (Heller) J.F. Macbride var. brachycodon (Barneby) Barneby, Amer. Midl. Nat. 55(2): 487. 1956.

    Synonyms: Astragalus whitedii var. brachycodon Barneby
Astragalus curvicarpus (Heller) J.F. Macbride var. subglaber (Rydb.) Barneby, Amer. Midl. Nat. 55(2): 487. 1956.

    Synonyms: Astragalus subglaber (Rydb.) M.E. Peck
Astragalus gibbsii Kellogg, Proc. Calif. Acad. Sci. 2: 161. 1863.

Overview Note
Astragalus conjunctus S. Watson, Proc. Amer. Acad. Arts 17: 371. 1882.
Astragalus conjunctus S. Watson var. conjunctus.

   Synonyms: Astragalus diversifolius var. campestris (Nutt.) Dorn.

Astragalus reventus var. conjunctus (S. Watson) M.E. Jones.

Homalobus campestris Nutt.

 2n=24
Astragalus conjunctus S. Watson var. rickardii Welsh, F. Beck & K. Caplow, Great Basin Nat. 57(4): 354. 1997.
Astragalus hoodianus T.J. Howell, Erythea 1(5): 111. 1893.

   Synonyms: Astragalus conjunctus var. oxytropidoides M.E. Jones

Astragalus reventus var. oxytropidoides (M.E. Jones) Hitchc.

Cnemidophacos knowlesianus Rydb.
Astragalus leibergii M.E. Jones, Proc. Calif. Acad. Sci., Series 2, 5(18): 663–664. 1895.

    Synonyms: Astragalus arrectus var. leibergii (M.E. Jones) M.E. Jones.
Astragalus reventiformis (Rydberg) Barneby, Amer. Midl. Naturalist 55(2): 492. 1956.

    Synonyms: Astragalus reventus var. canbyi M.E. Jones.

Overview Note
Astragalus californicus (A. Gray) Greene, Bull. Calif. Acad. Sci. 1(3): 157–158. 1885.
Astragalus ceramicus E. Sheldon, Minnesota Bot. Stud. 1(1): 19. 1894.
Astragalus ceramicus E. Sheldon var. ceramicus. 2n=22
Astragalus ceramicus E. Sheldon var. apus Barneby, Mem. New York Bot. Gard. 13: 341. 1964.
Astragalus ceramicus E. Sheldon var. filifolius (Gray) F.J. Herm., J. Wash. Acad. Sci. 38(7): 237. 1948

    Synonyms: Astragalus longifolius (Pursh) Rydb.

Phaca longifolia (Pursh) Nutt.
Astragalus cusickii A. Gray, Proc. Amer. Acad. Arts 13: 370–371. 1878.
Astragalus cusickii A. Gray var. cusickii. 2n=22, 24
Astragalus cusickii A. Gray var. flexilipes Barneby, Amer. Midl. Naturalist 55(2): 485. 1956.
Astragalus filipes Torrey ex A. Gray, Proc. Amer. Acad. Arts 6: 226. 1864.

   Synonyms: Astragalus filipes var. residuus Jepson.

Astragalus macgregorii (Rydb.) Tidestrom.

Astragalus stenophyllus Torr. & Gray, 2n= 24.

Astragalus stenophyllus var. filipes (Torr. ex Gray) Tidestrom.

 n=11
Astragalus inversus M.E. Jones, Zoë 4(3): 276. 1893.
Astragalus kerrii Knight & Cully , Southwestern Naturalist 36(2): 198–200, f. 1. 1991.
Astragalus knightii Barneby, Brittonia 35(2): 109–110. 1983.
Astragalus packardiae (Barneby)J. F. sm & Zimmer, Phytoneuron 38: 2. 2017., (**)

    Synonyms: Astragalus cusickii A. Gray var. packardiae Barneby.
Astragalus sterilis Barneby, Leaflets of Western Botany 5(12): 193–195. 1949., (**), (R).

    Synonyms: Astragalus cusickii A. Gray var. sterilis (Barneby) Barneby.

Astragalus amphioxys var. cymbellus M.E. Jones.
Astragalus whitneyi A. Gray, Proc. Amer. Acad. Arts 6: 526. 1865.
Astragalus whitneyi A. Gray var. confusus Barneby, Aliso 2(3): 206–207. 1950.
Astragalus whitneyi A. Gray var. lenophyllus (Rydb.) Barneby, Aliso 2(3): 205. 1950
Astragalus whitneyi A. Gray var. siskiyouensis (Rydb.) Barneby, Aliso 2(3): 205. 1950.

    Synonyms: Astragalus whitneyi ssp. siskiyouensis (Rydb.) Abrams.
Astragalus whitneyiA. Gray var. sonneanus (Greene) Jepson, Fl. Calif. 2(4): 347–348. 1936.

    Synonyms: Astragalus whitneyi ssp. hookerianus (Torr. & Gray) Abrams.
Astragalus whitneyiA. Gray var. whitneyi.

    Synonyms: Astragalus whitneyi ssp. pinosus (Elmer) Abrams.

 n=11, 2n=22

Overview Note
Astragalus striatiflorus M.E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 643–644. 1895.

Overview Note
Astragalus curtipes A. Gray, Proc. Calif. Acad. of Sci. 3(6): 103. 1864.
Astragalus nuttallii (Torrey & A. Gray) J.T. Howell, Leafl. W. Bot. 5(6): 107. 1948.
Astragalus nuttallii (Torrey & A. Gray) J.T. Howell var. nuttallii

    Synonyms: Astragalus menziesii Gray.

 n=11
Astragalus nuttallii (Torrey & Gray) Howell var. virgatus (Gray ex Brewer & Wats.) Barneby, Aliso 4(1): 135.1958.

   Synonyms: Astragalus menziesii ssp. virgatus (Gray ex Brewer & S. Wats.) Abrams.
Astragalus oxyphysus A. Gray, Proc. Calif Acad. Sci. 3(6): 103. 1864. 2n=22
Astragalus pomonensis M.E. Jones, Cont. Western Botany 10: 59, pl. 9. 1902. n=11, 2n=22
Astragalus pycnostachyus Gray, Proc. Amer. Acad. Arts 6: 527. 1865.
Astragalus pycnostachyus Gray var. pycnostachyus
Astragalus pycnostachyus Gray var. lanosissimus (Rydb.) Munz & McBurney ex Munz, Bull. S. Calif. Acad. Sci. 31(2): 66. 1932.

Overview Note
Astragalus desperatus M.E. Jones, Zoë 2(3): 243–244. 1891.
Astragalus desperatus M.E. Jones var. desperatus. 2n=28
Astragalus desperatus M.E. Jones var. conspectus Barneby, Leafl. W. Bot. 5(5): 87. 1948.

    Synonyms: Astragalus barnebyi Welsh & Atwood.
Astragalus desperatus M.E. Jones var. neeseae Barneby, ntermount. Fl. 3(B): 140. 1989.

    Synonyms: Astragalus equisolensis Neese & Welsh.
Astragalus desperatus M.E. Jones var. petrophilus M.E. Jones, Rev. N.-Amer. Astragalus 204–205. 1923.
Astragalus deterior (Barneby) Barneby, Leaflets of Western Botany 7(2): 35. 1953.
Astragalus monumentalis Barneby, Leafl. W. Bot. 7(2): 35–37. 1953.
Astragalus monumentalis Barneby var. cottamii (Welsh) Isely, Syst. Bot. 8(4): 423. 1983.

    Synonyms: Astragalus cottamii Welsh, 2n=22.
Astragalus monumentalis Barneby var. monumentalis
Astragalus naturitensis Payson, Bot. Gaz. 60(5): 377–378. 1915.

Overview Note
Astragalus diphacus S. Watson, Proc. Amer. Acad. Arts 17: 342. 1882.

    Synonyms: Astragalus peonis Jones

 n=15, 2n=30

Overview Note
Astragalus lentiginosus Dougl. ex Hook., Fl. Bor.-Amer. 1(3): 151. 1831.
Astragalus lentiginosus Dougl. ex Hook. var. lentiginosus

   Synonyms: Astragalus lentiginosus var. carinatus M.E. Jones.

 2n=22
Astragalus lentiginosus Dougl. ex Hook. var. albifolius M.E. Jones, Rev. N.-Amer. Astragalus 124. 1923.

    Synonyms: Astragalus albifolius (M.E. Jones) Abrams.
Astragalus lentiginosus Dougl. ex Hook. var. ambiguus Barneby, Mem. New York Bot. Gard. 13: 945. 1964.
Astragalus lentiginosus Dougl. ex Hook. var. antonius Barneby, Leafl. W. Bot. 4(5): 100–101. 1945.
Astragalus lentiginosus Dougl. ex Hook. var. australis Barneby, Leafl. W. Bot. 4(5): 117–118. 1945. n=11
Astragalus lentiginosus Douglas ex Hook.  var. bryantii (Barneby) J.A.Alexander,  ??? 2009.

    Synonyms: Astragalus bryantii Barneby.
Astragalus lentiginosus Dougl. ex Hook. var. borreganus M.E. Jones, Contr. W. Bot. 8: 3. 1898.

   Synonyms: Astragalus agninus Jepson.

Astragalus arthu-schottii Gray.

Astragalus coulteri Benth.

Astragalus lentiginosus var. coulteri (Benth.) M.E. Jones.
Astragalus lentiginosus Dougl. ex Hook. var. chartaceus Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 673–674. 1895.

Synonyms: Astragalus lentiginosus var. platyphyllidius (Rydb.) M.E. Peck.
Astragalus lentiginosus Dougl. ex Hook. var. coachellae Barneby ex Shreve & Wiggins, Proc. Calif. Acad. Sci., ser. 2, 5(18): 673–674. 1964. ????
Astragalus lentiginosus Dougl. ex Hook. var. diphysus (Gray) Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 673. 1895.

    Synonyms: Astragalus araneosus Sheldon

Astragalus lentiginosus var. albiflorus (Gray) Schoener.

Astragalus lentiginosus var. araneosus (Sheldon) Barneby.

Astragalus lentiginosus var. mcdougallii (Sheldon) M.E. Jones.

Astragalus lentiginosus var. wahweapensis Welsh.

 n=11
Astragalus lentiginosus Dougl. ex Hook. var. floribundus Gray, Proc. Amer. Acad. Arts 6: 524. 1865.
Astragalus lentiginosus Dougl. ex Hook. var. fremontii (Gray ex Torr.) S. Wats., Botany 66. 1871.

    Synonyms: Astragalus fremontii Gray ex Torr.

Astragalus fremontii ssp. eremicus (Sheldon) Abrams.
Astragalus lentiginosus Dougl. ex Hook. var. higginsii Welsh & Thorne, Brittonia 33(3): 296. 1981.
Astragalus lentiginosus Dougl. ex Hook. var. idriensis M.E. Jones, Contr. W. Bot. 10: 63–64. 1902.

    Synonyms: Astragalus idriensis (M.E. Jones) Abrams.

Astragalus tehatchapiensis (Rydb.) Tidestrom.
Astragalus lentiginosus Dougl. ex Hook. var. ineptus (Gray) Jones, Rev. N.-Amer. Astragalus 124. 1923.

   Synonyms: Astragalus ineptus Gray.
Astragalus lentiginosus Dougl. ex Hook. var. kennedyi (Rydb.) Barneby, Leafl. W. Bot. 4(5): 121. 1945. 2n=22
Astragalus lentiginosus Dougl. ex Hook. var. kernensis (Jepson) Barneby

    Synonyms: Astragalus lentiginosus var. charlestonensis (Clokey) Barneby.
Astragalus lentiginosus Dougl. ex Hook. var. latus (M.E. Jones) M.E. Jones, Rev. N.-Amer. Astragalus 125. 1923.

   Synonyms: Astragalus latus M. E Joones.
Astragalus lentiginosus Dougl. ex Hook. var. maricopae Barneby, Leafl. W. Bot. 4(5): 140. 1945.
Astragalus lentiginosus Dougl. ex Hook. var. micans Barneby, Leafl. W. Bot. 8(1): 22–23. 1956.
Astragalus lentiginosus var. multiracemosus Welsh & Atwood, N. Amer. Sp. Astragalus 294–295. 2007.
Astragalus lentiginosus var. negundo Welsh & Atwood, N. Amer. Sp. Astragalus 302. 2007.
Astragalus lentiginosus Dougl. ex Hook. var. nigricalycis M.E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 674. 1895.

    Synonyms: Astragalus nigricalycis (M.E. Jones) Abrams.
Astragalus lentiginosus Dougl. ex Hook. var. oropedii Barneby, Leafl. W. Bot. 4(5): 135–137. 1945.
Astragalus lentiginosus Dougl. ex Hook. var. palans (M.E. Jones) M.E. Jones, Contr. W. Bot. 8: 4. 1895.

    Synonyms: Astragalus lentiginosus var. ursinus (Gray) Barneby.

 n=11
Astragalus lentiginosus Dougl. ex Hook. var. piscinensis Barneby, Brittonia 29(4): 378–380. 1977.
Astragalus lentiginosus Dougl. ex Hook. var. platyphyllidius (Rydberg) M. Peck, Man. Pl. Oregon 449.1941.
Astragalus lentiginosus Dougl. ex Hook. var. pohilii Welsh & Barneby, Iselya 2(1): 1–2. 1981.
Astragalus lentiginosus Dougl. ex Hook. var. salinus (T.J. Howell) Barneby, Leafl. W. Bot. 4(5): 86. 1945.

    Synonyms: Astragalus lentiginosus var. macrolobus (Rydb.) Barneby.

Astragalus salinus T.J. Howell.

 n=11
Astragalus lentiginosus Dougl. ex Hook. var. scorpionis M.E. Jones, Rev. N.-Amer. Astragalus 124. 1923.

   Synonyms: Astragalus lentiginosus var. tremuletorum Barneby.
Astragalus lentiginosus Dougl. ex Hook. var. semotus Jepson, Fl. Calif. 2(4): 357.1936. n=10+0-2f
Astragalus lentiginosus Dougl. ex Hook. var. sesquimetralis (Rydb.) Barneby, Leafl. W. Bot. 4(5): 116. 1945.
Astragalus lentiginosus Dougl. ex Hook. var. sierrae M.E. Jones, Rev. N.-Amer. Astragalus 124. 1923.
Astragalus lentiginosus Dougl. ex Hook. var. stramineus (Rydb.) Barneby, Leafl. W. Bot. 4(5): 122. 1945.
Astragalus lentiginosus Dougl. ex Hook. var. variabilis Barneby, Leafl. W. Bot. 4(5): 123–127. 1945. n=11
Astragalus lentiginosus Dougl. ex Hook. var. vitreus Barneby, Leafl. W. Bot. 4(5): 119–121. 1945. n=11
Astragalus lentiginosus Dougl. ex Hook. var. wilsonii (Greene) Barneby, Leafl. W. Bot. 4(5): 139. 1945. n=11
Astragalus lentiginosus Dougl. ex Hook. var. yuccanus M.E. Jones, Contr. W. Bot. 8: 3–4. 1898. n=11
Astragalus lentiginosus Douglas ex Hook. var. toiyabensis Barneby, Leafl. W. Bot. 4(5): 106–107. 1945.
Astragalus lentiginosus Douglas ex Hook. var. trumbullensis Welsh & Atwood, Rhodora 103(913): 81–82. 2001.
Astragalus lentiginosus Douglas ex Hook. var. wahweapensis Welsh, Great Basin Naturalist 38(3): 286–287. 1978.
Astragalus lentiginosus Douglas ex Hook. var. iodanthus (S.Watson) J.A.Alexander, ???? 2009.

   Synonyms: Astragalus iodanthus S. Wats. var. iodanthus.

Astragalus iodanthus S. Wats. var. diaphanoides Barneby.

Astragalus iodanthus var. vipereus Barneby.
Astragalus lentiginosus Douglas ex Hook. var. pseudiodanthus (Barneby) J.A.Alexander, ???? 2009.

    Synonyms: Astragalus pseudiodanthus Barneby.

Astragalus iodanthus var. pseudiodanthus (Barneby) Isely.

Overview Note
Astragalus chloodes Barneby, Leaflets of Western Botany 5(1): 6–7. 1947.
Astragalus detritalis M.E. Jones, Cont. Western Botany 13: 9. 1910.
Astragalus drabelliformis Barneby, Mem. New York Bot. Garden 13: 287–289. 1964.
Astragalus simplicifolius (Nutt.) A. Gray, Proc. Amer. Acad. Arts 6: 231. 1864.
Astragalus spatulatus E. Sheldon, Minnesota Bot. Stud. 1(1): 22. 1894.

   Synonyms: Astragalus caespitosus (Nutt.) Gray.

Astragalus spatulatus var. uniflorus (Rydb.) Barneby.

 2n=24

Overview Note
Astragalus drummondii Douglas ex Hook., Fl. Bor.-Amer. 1(3): 153–154. 1831.

    Synonyms: Tium drummondii (Dougl. ex Hook.) Rydb.

 n=11, 2n=22

Overview Note
Astragalus bourgovii A. Gray, Proc. American Academy of Arts and Sciences 6: 227. 1864.
Astragalus kentrophyta Gray, Proc. Acad. Nat. Sci. Philadelphia 15(3): 60. 1863.
Astragalus kentrophyta Gray var. kentrophyta

   Synonyms: Astragalus viridis (Nutt.) Sheldon.

Kentrophyta montana Nutt.

 2n=24
Astragalus kentrophyta Gray var. coloradoensis M.E. Jones, Contr. W. Bot. 10: 63. 1902.

   Synonyms: Astragalus kentrophyta ssp. coloradoensis (M.E. Jones) W.A. Weber.
Astragalus kentrophyta Gray var. danaus (Barneby) Barneby, Leafl. W. Bot. 6(7): 154. 1951.

   Synonyms: Astragalus kentrophyta ssp. danaus (Barneby) W.A. Weber.
Astragalus kentrophyta Gray var. douglasii Barneby, Mem. New York Bot. Gard. 13: 364–365. 1964.

   Synonyms: Astragalus kentrophyta ssp. douglasii (Barneby) W.A. Weber.
Astragalus kentrophyta Gray var. elatus S. Wats., Botany 77. 1871.

   Synonyms: Astragalus impensis (Rydb.) Woot. & Standl.

Astragalus kentrophyta ssp. elatus (S. Wats.) W.A. Weber.
Astragalus kentrophyta Gray var. jessiae (M.E. Peck) Barneby, Leafl. W. Bot. 6(7): 154. 1951.

   Synonyms: Astragalus jessiae M.E. Peck.

Astragalus kentrophyta ssp. jessiae (M.E. Peck) W.A. Weber.
Astragalus kentrophyta Gray var. neomexicanus (Barneby) Barneby, Leafl. W. Bot. 6(7): 154. 1951.

   Synonyms: Astragalus kentrophyta ssp. neomexicanus (Barneby) W.A. Weber.
Astragalus kentrophyta Gray var. tegetarius (S. Wats.) Dorn, Vasc. Pl. Wyoming 297. 1988.

   Synonyms: Astragalus kentrophyta ssp. implexus (Canby ex Porter & Coult.) W.A. Weber.

Astragalus kentrophyta var. implexus (Canby ex Porter & Coult.) Barneby.

Astragalus tegetarius S. Wats.

Astragalus aculeatus ??

Astragalus tegetarius S. Wats.
Astragalus kentrophyta Gray var. ungulatus M.E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 650. 1895.

   Synonyms: Astragalus kentrophyta ssp. ungulatus (M.E. Jones) W.A. Weber.
Astragalus microcystis A. Gray, Proc. Amer. Acad. Arts 6: 220. 1864.

   Synonyms: Astragalus tenellus Pursh, n=12, 2n=16, 24.

Astragalus tenellus var. strigulosus (Rydb.) F.J. Herm.

Homalobus tenellus (Pursh) Britt.
Astragalus vexilliflexus E. Sheldon, Minnesota Bot. Stud. 1(1): 21. 1894.
Astragalus vexilliflexus E. Sheldon var. vexilliflexus.

   Synonyms: Homalobus vexilliflexus (Sheldon) Rydb.

 2n=22
Astragalus vexilliflexus E. Sheldon var. nubilus Barneby, Amer. Midl. Naturalist 55(2): 484–485. 1956.

Overview Note
Astragalus convallarius Greene, Erythea 1(10): 207. 1893.
Astragalus convallarius Greene var. convallarius

   Synonyms: Astragalus junciformis A. Nels.
Astragalus convallarius Greene var. finitimus Barneby, Leafl. W. Bot. 7(8): 192–193. 1954.
Astragalus convallarius Greene var. margaretiae Barneby, Brittonia 36(2): 167–168. 1984.
Astragalus convallarius Greene var. scopulorum Barneby, Leafl. W. Bot. 5(2): 30–31.1947.
Astragalus diversifolius A. Gray, Proc. Amer. Acad. Arts 6: 230. 1864.

    Synonyms: Astragalus reclinatus Cronq.
Astragalus miser Dougl., Fl. Bor.-Amer. 1(3): 153. 1831.
Astragalus miser Dougl. var. miser

    Synonyms: Astragalus strigosus Coult. & Fisher.

 2n=22, (Se.)
Astragalus miser Dougl. var. crispatus (M.E. Jones) Cronq., Leafl. W. Bot. 7(2): 18. 1953.

    Synonyms: Astragalus decumbens var. crispatus (M.E. Jones) Cronq. & Barneby.
Astragalus miser Dougl. var. decumbens (Nutt. ex Torr. & Gray) Cronq., Leafl. W. Bot. 7(2): 18. 1953.

   Synonyms: Astragalus decumbens (Nutt. ex Torr. & Gray) Gray.
Astragalus miser Dougl. var. hylophilus (Rydb.) Barneby, Amer. Midl. Naturalist 55(2): 482. 1956.
Astragalus miser Dougl. var. oblongifolius (Rydb.) Cronq., Leafl. W. Bot. 7(2): 18. 1953.

   Synonyms: Astragalus decumbens var. oblongifolius (Rydb.) Cronq.

 n=11
Astragalus miser Dougl. var. praeteritus Barneby, Amer. Midl. Naturalist 55(2): 483. 1956.
Astragalus miser Dougl. var. serotinus (Gray ex Cooper) Barneby, Amer. Midl. Naturalist 55(2): 481. 1956.

   Synonyms: Astragalus decumbens var. serotinus (Gray ex Cooper) M.E. Jones, 2n=16,18.

Astragalus serotinus Gray ex Cooper.

 2n= 22
Astragalus miser Dougl. var. tenuifolius (Nutt.) Barneby, Leafl. W. Bot. 7(8): 195. 1954.

Overview Note
Astragalus giganteus S. Watson, Proc. Amer. Acad. Arts 17: 370. 1882.

Overview Note
Astragalus fraxinifolius DC. see Old World list, Introduced
Astragalus glycyphyllos L. 2n=16, see Old World list, Introduced
Astragalus glycyphylloides DC. 2n=16, see Old World list, Introduced

Overview Note
Astragalus greggii S. Watson, Proc.. Amer. Acad. of Arts and Sciences 17: 343. 1882.
Astragalus pomphocalyx Villarreal & Carranz Greggiani, Brittonia 46(4): 337–339. 1994.

Overview Note
Astragalus nutzotinensis J. Rousseau, Contr. Lab. Bot. Univ. Montréal 24: 14. 1833. 2n=22

Overview Note
Astragalus williamsii Rydberg, Bull. New York Bot. Garden 2(6): 175. 1901. (N+), Fl.panarctic confirm presence of species.

Overview Note
Astragalus australis (L.) Lam., Fl. Fr. 2: 637. 1778.

   Synonyms: Astragalus aboriginorum Richards., It seems a distinct taxon, Fl.panarctic, 2017 .2n=16, (N+), (**)

Astragalus aboriginorum var. fastigiorum M.E. Jones.

Astragalus aboriginorum var. glabriusculus (Hook.) Rydb.

Astragalus aboriginorum var. lepagei (Hultén) Boivin.

Astragalus aboriginorum var. richardsonii (Sheldon) Boivin.

Astragalus australis var. glabriusculus (Hook.) Isely.

Astragalus australis var. major (Gray) Isely.

Astragalus cottonii M.E. Jones, (N+)

Astragalus australis var. olympicus Isely.

Astragalus forwoodii S. Wats.

Astragalus forwoodii var. wallowensis (Rydb.) M.E. Peck.

Astragalus glabriusculus var. major Gray.

Astragalus linearis (Rydb.) Porsild, 2n=32.

Astragalus richardsonii Sheldon, 2n=32, 48 , It seems a distinct taxon, Fl.panarctic, 2017., (**)

Astragalus scrupulicola Fern. & Weatherby.

Astragalus Atelophragma aboriginorum (Richards.) Rydb.

 2n=48, (N+), see Old World list, Introduced
Astragalus australis var. lepagei (Hultén) Welsh, Great Basin Naturalist 58(1): 47. 1998.

    Synonyms: Astragalus lepagei Hulten,  2n=32.

Overview Note
Astragalus bolanderi A. Gray, Proc. Amer. Acad. of Arts and Sciences 7(2): 337. 1868. 2n=22

Overview Note
Astragalus cremnophylax Barneby, Leafl. W. Bot. 5(5): 83–85. 1948.
Astragalus cremnophylax Barneby var. cremnophylax
Astragalus cremnophylax Barneby var. hevronii Barneby, Brittonia 44(2): 238. 1992.
Astragalus cremnophylax Barneby var. myriorrhaphis Barneby, Brittonia 31(4): 463. 1979.
Astragalus gilensis Greene, Bull. Torrey Botanical Club 8(9): 97. 1881. n=11
Astragalus humillimus A. Gray, Bull. U.S. Geol. Geogr. Surv. Territ. 2(3): 235. 1876. 2n=22
Astragalus siliceus Barneby, Leaflets of Western Botany 8(1): 14–16. 1956.
Astragalus troglodytus S. Watson, Pro. Amer. Acad. Arts and Sciences 20: 362. 1885.
Astragalus wittmannii Barneby, Brittonia 31(4): 459–462, f. 1. 1979. 2n=22

Overview Note
Astragalus chuskanus Barneby & Spellenberg , Brittonia 39(2): 188–191. 1987. 2n=24
Astragalus humistratus A. Gray, Smithsonian Contr. Knowl. 5(6): 43–44. 1853.
Astragalus humistratus A. Gray var. humistratus.

    Synonyms: Astragalus datilensis (Rydb.) Tidestrom.

 2n=24
Astragalus humistratus A. Gray var. crispulus Barneby, Leafl. W. Bot. 4(4): 53–54. 1944.
Astragalus humistratus A. Gray var. hosackiae (Greene) M.E. Jones, ontr. W. Bot. 10: 58. 1902. n=12
Astragalus humistratus A. Gray var. humivagans (Rydb.) Barneby, Amer. Midl. Nat. 55(2): 478. 1956. n=12
Astragalus humistratus A. Gray var. sonorae (Gray) M.E. Jones, Contr. W. Bot. 10: 58. 1902.
Astragalus humistratus A. Gray var. tenerrimus M.E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 649. 1895.
Astragalus micromerius Barneby, Leaflets of Western Botany 5(5): 85–86. 1948.
Astragalus sesquiflorus S. Watson, Proc. Amer. Acad. Arts 10: 346. 1875.

   Synonyms: Astragalus sesquiflorus var. brevipes Barneby.
Astragalus tegetarioides M. E. Jones, Contr. W. Bot. 10: 66–67. 1902.
Astragalus tegetarioides M. E. Jones var. tegetarioides.
Astragalus tegetarioides M. E. Jones var. anxius (Meinke & Kaye) S. L. Welsh, Great Basin Nat. 58(1): 51. 1998.

   Synonyms: Astragalus anxius Meinke & Kaye.

Overview Note
Astragalus agrestis Douglas ex G. Don, Gen. Hist. 2: 258.

   Synonyms: Astragalus danicus var. dasyglottis (Fisch. ex DC.) Boivin.

Astragalus dasyglottis Fisch. ex DC., 2n=16.

Astragalus goniatus Nutt.,  2n=16.

Astragalus hypoglottis Hook.

Astragalus bourgeanus   Cosson ??

 2n=16,  see Old World list, Introduced
Astragalus cicer L., Sp. Pl. 2: 757. 1753. see Old World list, Introduced
Astragalus glaux L. , Sp. Pl. 2: 759–760. 1753.
Astragalus tibetanus Bunge, Mém. Acad. Imp. Sci. Saint Péters., Sér. 7, 11(16): 52. 1868. see Old World list,Introduced

Overview Note
Astragalus hypoleucus S. Schauer, Linnaea 20: 747. 1847. 2n=28, n=14

Overview Note
Astragalus allochrous A. Gray, roc. Amer. Acad. Arts 13: 366. 1878.
Astragalus allochrous A. Gray var. allochrous. 2n=22, n=11
Astragalus allochrous A. Gray var. playanus Isely, Syst. Bot. 8(4): 420. 1983.

    Synonyms: Astragalus wootonii Sheldon, 2n=22.

Astragalus wootonii var. typicus Barneby.
Astragalus aquilonius (Barneby) Barneby, Memoirs of The New York Botanical Garden 13: 876. 1964.

   Synonyms: Astragalus wootonii var. aquilonius Barneby
Astragalus aridus A. Gray, Proc. Amer. Acad. Arts 6: 223. 1864.
Astragalus beatleyae Barneby, Aliso 7(2): 161–163. 1970.
Astragalus cerussatus E. Sheldon, Minnesota Botanical Studies 1(3): 139. 1894.
Astragalus comonduensis A. E. Estrada, Rebman & Villarreal, Phytotaxa 391(1): 59–63. 2019.
Astragalus deanei (Rydberg) Barneby, Aliso 4(1): 133. 1958.
Astragalus diaphanus Dougl. ex Hook., Fl. Bor.-Amer. 1(3): 151. 1831.

   Synonyms: Astragalus diaphanus var. diurnus (S. Wats.) Barneby ex M.E. Peck.

Astragalus diurnus S. Wats.

Astragalus drepanolobus Gray.
Astragalus douglasii (Torr. & Gray) Gray, Proc. Amer. Acad. Arts 6: 215. 1864.
Astragalus douglasii (Torr. & Gray) Gray var. douglasii.

   Synonyms: Astragalus douglasii var. megalophysus (Rydb.) Munz & McBurney.

 2n=22
Astragalus douglasii (Torr. & Gray) Gray var. parishii (Gray) M.E. Jones, Contr. W. Bot. 8: 6. 1898.

   Synonyms: Astragalus parishii Gray.

 n=11
Astragalus douglasii (Torr. & Gray) Gray var. perstrictus (Rydb.) Munz & McBurney ex Munz, Bull. S. Calif. Acad. Sci. 31(2): 65. 1932.

Synonyms: Astragalus parishii ssp. perstrictus (Rydb.) Abrams.

 n=11
Astragalus endopterus (Barneby) Barneby, Memoirs of The New York Botanical Garden 13: 879. 1964.

   Synonyms: Astragalus wootonii var. endopterus Barneby.
Astragalus fastidius (Kellogg) M.E. Jones, Contributions to Western Botany 8: 7. 1898.

   Synonyms: Astragalus fastidiosus Greene.

 n=11
Astragalus geyeri A. Gray, Proc. Amer. Acad. Arts 6: 214. 1864.
Astragalus geyeri A. Gray var. geyeri
Astragalus geyeri A. Gray var. triquetrus (Gray) M.E. Jones, Contr. W. Bot. 8: 7. 1898.

    Synonyms: Astragalus triquetrus Gray.
Astragalus gilmanii Tidestrom, Pro. Biological Society of Washington 50(7): 20. 1937.
Astragalus gruinus Barneby see S. America list. Shared in N & S. America.
Astragalus hornii Gray, Proc. Amer. Acad. Arts 7: 398. 1868.
Astragalus idrietorum Barneby, Vegetation and Flora of the Sonoran Desert 1: 703. 1964. n=11
Astragalus insularis Kellogg, Bull. Calif. Acad. Sci. 1(1): 6. 1884.
Astragalus insularis Kellogg var. insularis.
Astragalus insularis var. harwoodii (Munz & McBurney ex Munz)Abram, Bull. S. Calif. Acad. Sci. 31(2): 66. 1932.

   Synonyms: Astragalus harwoodii Munz & Mc Burney ex Munz

 n=11
Astragalus macrodon (Hook. & Arn.) A. Gray, Proc. Amer. Acad. Arts 6: 216. 1864.
Astragalus magdalenae Greene, Pittonia 1(10): 162. 1888.
Astragalus magdalenae Greene var. magdalenae. n=11
Astragalus magdalenae Greene var. peirsonii (Munz & McBurney) Barneby, Aliso 4(1): 135. 1958.

   Synonyms: Astragalus peirsonii Munz & McBurney.
Astragalus moranii Barneby, Brittonia 28(3): 278–280, f. 3. 1976.
Astragalus nutans M.E. Jones, Revision of North-American Astragalus 108–109. 1923.

   Synonyms: Astragalus chuckwallae Abrams.
Astragalus oocarpus A. Gray, Proc. Amer. Acad. of Arts and Sciences 6: 213. 1864. n=11
Astragalus palmeri A. Gray, Proc. Amer. Acad. Arts 7: 398. 1868.

    Synonyms: Astragalus vaseyi S. Wats.

Astragalus vaseyi var. johnstonii Munz & McBurney ex Munz.

Astragalus vaseyi var. metanus (M.E. Jones) Munz & McBurney.
Astragalus pardalinus (Rydberg) Barneby, Memoirs of The New York Botanical Garden 13: 884. 1964.
Astragalus piscinus (M.E. Jones) Barneby, Veg. Fl. Sonoran Desert 1: 703. 1964.
Astragalus prorifer M.E. Jones, Zoë 4(3): 275. 1893.

   Synonyms: Phaca prorifera Jones.

Astragalus julianus M. E. Jones.

 2n=22
Astragalus pubentissimus Torr. & Gray, Fl. N. Amer. 1(4): 693. 1840.

    Synonyms: Astragalus peabodianus M.E. Jones

Astragalus pubentissimus var. peabodianus (M.E. Jones) Welsh.
Astragalus sabulonum A. Gray, Proc. Amer. Acad. of Arts and Sciences 13: 368. 1878. 2n=24
Astragalus sanctorum Barneby, Brittonia 28(3): 275–278, f. 2. 1976.
Astragalus serpens M.E. Jones, Proc. Calif. Acad. Sci., Series 2, 5(18): 641–642. 1895.
Astragalus sparsiflorus A. Gray, Proc. Amer. Acad. Arts 6: 205–20. 1864.
Astragalus sparsiflorus A. Gray var. sparsiflorus.
Astragalus sparsiflorus A. Gray var. majusculus A. Gray, Proc. Amer. Acad. Arts 6: 206. 1864.

   Synonyms: Homalobus caespitosus Nutt.

Orophaca caespitosa Nutt.
Astragalus thurberi A. Gray, Plantae Novae Thurberianae 312–313. 1854. n=11
Astragalus wardii A. Gray, Proc. Amer. Acad. of Arts and Sciences 12: 55. 1876.
Astragalus wetherillii M.E. Jones, Zoë 4(1): 34–35. 1893.
Astragalus wootonii E. Sheldon, Minnesota Bot. Stud. 1(3): 138. 1894.
Astragalus wootonii E. Sheldon var candolianus (Kunth) Barneby, Amer. Midl. Naturalist 41(2): 498. 1949.
Astragalus wootonii E. Sheldon var. wootonii. n=11

Overview Note
Astragalus inyoensis Sheldon, Contr. U.S. Natl. Herb. 4: 86–87. 1893. 2n=22

Overview Note
Astragalus jaegerianus Munz, Leaflets of Western Botany 3(3): 49–50. 1941.

Overview Note
Astragalus jejunus S. Watson, Botany (Fortieth Parallel) 73. 1871.
Astragalus jejunus S. Watson var. jejunus.
Astragalus jejunus S. Watson var. articulatus Dorn, Vasc. Pl. Wyoming 2971988.
Astragalus limnocharis Barneby, Leafl. W. Bot. 4(9): 236–237. 1946.
Astragalus limnocharis Barneby var. limnocharis.
Astragalus limnocharis Barneby var. montii (Welsh) Isely, Syst. Bot. 8(4): 422. 1983.

    Synonyms: Astragalus limnocharis var. tabulaeus Welsh.

Astragalus montii Welsh.

Overview Note
Astragalus alpinus L. 2n=16, 32, 32+2B, Old and New World, see Old World list, Introduced
Astragalus alpinus L. var. alpines New and Old World, see Old World list, Introduced
Astragalus alpinus L. var. brunetianus Fernald New World
Astragalus alpinus L. subsp. alaskanus Hulten, Fl. Alaska Yukon 7: 1082–1083.1947. 2n=32, Fl. Panarctic, 2017., (**)

Overview Note
Astragalus layneae Greene, Bull. Calif. Acad Sciences 1(3): 156–157. 1885. n=22

Overview Note
Astragalus acutirostris S. Watson, Proc. Amer. Acad. Arts and Sciences 20: 360–361. 1885. 2n=24
Astragalus albens Greene, Bull. Calif. Acad. Sciences 1(3): 156. 1885.
Astragalus arizonicus A. Gray, Proc. Amer. Acad. Arts and Sciences 7: 398. 1868. n=8,12
Astragalus bernardinus M.E. Jones, Proc. Calif. Acad. Sciences, Series 2, 5(18): 661. 1895.
Astragalus breweri A. Gray, Proc. Calif. Acad. Sci. 3(6): 103. 1864. n=11, 2n=22 “ sect. breweriana”
Astragalus clarianus Jepson, ???? n=22
Astragalus coahuilae M.E. Jones, Revision of North-American Astragalus 256. 1923.
Astragalus emoryanus (Rydberg) Cory. Rhodora 38(455): 406. 1936.
Astragalus emoryanus (Rydberg) Cory var. emoryanus. n=11,12, (N+)
Astragalus emoryanus (Rydberg) Cory var. terlinguensis (Cory) Barneby, Amer. Midl. Nat. 55(2): 494. 1956. 2n=24
Astragalus francisquitensis M.E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 666. 1895.
Astragalus gentryi Standl., Pub. Field Museum of Nat. Hist., Bot. Series 22(1): 22. 1940.
Astragalus hypoxylus S. Watson, Proc. Amer. Acad. Arts and Sciences 18: 192. 1883.
Astragalus leptocarpus Torrey&A. Gray, A Flora of North America: containing , 1(2): 334. 1838. 2n=26
Astragalus lindheimeri Engelmann ex A. Gray, Smithsonian Contr. Knowl. 3(5): 52. 1853. 2n=24
Astragalus martini Spellenberg et al, Phytoneuron 66: 2–8. 2014., 2014 (**)
Astragalus mohavensis S. Wats., Proc. Amer. Acad. Arts 20: 361. 1885.
Astragalus mohavensis S. Wats. var. mohavensis.
Astragalus mohavensis S. Wats. var. hemigyrus (Clokey) Barneby, Aliso 2(3): 2071950.
Astragalus nothoxys A. Gray, Proc. Amer. Acad. of Arts and Sciences 6: 232–233. 1864. n=14, 2n=28
Astragalus nyensis Barneby, Leaflets of Western Botany 7(8): 195. 1954. 2n=26
Astragalus nuttallianus DC., Prodr. 2: 289. 1825.
Astragalus nuttallianus DC. var. nuttallianus
Astragalus nuttallianus DC. var. austrinus (Small) Barneby, Veg. Fl. Sonoran Desert 1: 709. 1964.

    Synonyms: Astragalus austrinus (Small) E.D. Schulz.

 n=12
Astragalus nuttallianus DC. var. cedrosensis M.E. Jones, Rev. N.-Amer. Astragalus 2701923.
Astragalus nuttallianus DC. var. imperfectus (Rydberg) Barneby, Leafl. W. Bot. 3(5): 109. 1942. n=11, 2n=22
Astragalus nuttallianus DC. var. macilentus (Small) Barneby ex Turner, Mem. New York Bot. Gard. 13: 1065., 1964.
Astragalus nuttallianus DC. var. micranthiformis Barneby, Mem. New York Bot. Gard. 13: 1064. 1964. 2n=24
Astragalus nuttallianus DC. var. trichocarpus Torrey & A. Gray, Fl. N. Amer. 1(2): 334–3351938.
Astragalus nuttallianus DC. var. zapatanus , Field & Lab. 24(1): 36–37.1956.
Astragalus parvus Hemsl., Biol. Cent.-Americana;. Bot. 1(3): 266. 1879. n=15
Astragalus pauperculus Greene, Pittonia 3(17B): 224. 1897.

    Synonyms: Astragalus bruceae (M.E. Jones) Abrams.

 2n=24
Astragalus pringlei S. Watson, Proc. Amer. Acad. Arts and Sciences 21: 449. 1886. Need to check
Astragalus pleianthus (Shinners) Isely, Iowa State Journal of Research 61: 195. 1986.

    Synonyms: Astragalus Nuttallianus var. pleianthus (Shinners,) Barneby.
Astragalus rattanii A. Gray, Proc. Amer. Acad. Arts 19: 75. 1883.
Astragalus rattanii A. Gray var. rattanii. 2n=22
Astragalus rattanii A. Gray var. jepsonianus Barneby, Aliso 4(1): 137. 1958. n=11, 2n=22
Astragalus tener A. Gray, Proc. Amer. Acad. Arts 6: 206. 1864.
Astragalus tener A. Gray var. tener. n=11; 2n=22
Astragalus tener A. Gray var. ferrisiae A. Liston, Brittonia 42(2): 100–102. 1990.
Astragalus tener A. Gray var. titi (Eastwood) Barneby, Aliso 2(3): 209. 2n=22
Astragalus tricarinatus A. Gray, Proc. Amer. Acad. of Arts and Sciences 12: 56. 1876.

Overview Note
Astragalus aequalis Clokey, Madroño 6(7): 215–216. 1942.
Astragalus coltonii M.E. Jones, Zoë 2(3): 237–238. 1891.
Astragalus coltonii M.E. Jones var. coltonii.
Astragalus coltonii M.E. Jones var. moabensis M.E. Jones, Contr. W. Bot. 8: 11–12. 1898.

    Synonyms: Astragalus canovirens (Rydb.) Barneby.
Astragalus cronquistii Barneby, Mem. New York Bot. Garden 13: 257–259, map 24. 1964.
Astragalus duchesnensis M.E. Jones, Cont. Western Botany 13: 9–11. 1910.
Astragalus episcopus S. Wats., Proc. Amer. Acad. Arts 10: 346. 1875.
Astragalus episcopus S. Wats. var. episcopus.

Synonyms: Astragalus kaibensis M.E. Jones.

 n=11
Astragalus episcopus S. Wats. var. lancearius (Gray) Isely, Syst. Bot. 8(4): 421. 1983.

   Synonyms: Astragalus lancearius Gray.
Astragalus hamiltonii C.L. Porter, Rhodora 54(642): 159–160. 1952.

    Synonyms: Astragalus lonchocarpus var. hamiltonii (C.L. Porter) Isely.
Astragalus lonchocarpus Torrey, Pacif. Railr. Rep. 4(5): 801857. 2n=22; n=11
Astragalus nidularius Barneby, Leaflets of Western Botany 8(1): 16–17. 1956.
Astragalus pinonis M.E. Jones, Contr. W. Bot. 8: 14. 1898.
Astragalus pinonis M.E. Jones var. pinonis.
Astragalus pinonis M.E. Jones var. atwoodii (Welsh & Thorne) Barneby & Isely, Intermount. Fl. 3(B): 67. 1989.

    Synonyms: Astragalus atwoodii Welsh & Thorne.
Astragalus ripleyi Barneby, Leaflets of Western Botany 6(9): 175–176. 1952.
Astragalus schmolliae C.L. Porter, Madroño 8(3): 100–102, pl. 9, f. 4–7. 1945.
Astragalus titanophilus Barneby, American Midland Naturalist 55(2): 477. 1956.

    Synonyms: Astragalus convallarius var. foliolatus Barneby.
Astragalus tortipes J.L. Anderson & J.M. Porter, Sys. Bot. 19(1): 116–125. 1994.
Astragalus xiphoides (Barneby) Barneby, Amer. Midl. Nat. 55(2): 477. 1956.

    Synonyms: Astragalus convallarius var. xiphoides Barneby.

Overview Note
Astragalus lotiflorus Hook., Fl. Bor.-Amer. 1(3): 152–153. 1831.

    Synonyms: Astragalus lotiflorus var. nebraskensis Bates.

Astragalus lotiflorus var. reverchonii (Gray) M.E. Jones.

Batidophaca lotiflorus (Hook.) Rydb.

 2n=22, 26

Overview Note
Astragalus lutosus M.E. Jones, Contributions to Western Botany 13: 7–9. 1910.

Overview Note
Astragalus chamaemeniscus Barneby , Leaflets of Western Botany 3(5): 105–107. 1942.
Astragalus cibarius E. Sheldon, Minnesota Botanical Studies 1(3): 149–150. 1894. 2n=22
Astragalus cimae M.E. Jones, Rev. N.-Amer. Astragalus 163. 1923.
Astragalus cimae M.E. Jones var. cimae.
Astragalus cimae M.E. Jones var. sufflatus Barneby, Aliso 2(3): 209. 1950.
Astragalus ensiformis M.E. Jones, Proc. Calif. Acad. Sci., ser. 2, 5(18): 658. 1895.
Astragalus ensiformis M.E. Jones var. ensiformis.
Astragalus ensiformis M.E. Jones var. gracilior Barneby, Proc. Calif. Acad. Sci., ser. 4, 25(3): 158. 28. 1944.

    Synonyms: Astragalus minthorniae var. gracilior (Barneby) Barneby.
Astragalus malacus A. Gray, Proc. Amer. Acad. Arts 7(2): 336–337. 1868.
Astragalus malacoides Barneby, Mem. New York Bot. Garden 13: 500–501. 1964.
Astragalus maliceides Barneby douptful species.
Astragalus minthorniae (Rydb.) Jepson, Fl. Calif. 2(4): 374. 1936.
Astragalus minthorniae (Rydb.) Jepson var. minthorniae.
Astragalus minthorniae (Rydb.) Jepson var. villosus Barneby, Aliso 2(3): 208–209. 1950.
Astragalus vallaris M.E. Jones, Contributions to Western Botany 10: 59–60. 1902.

Overview Note
Astragalus beckwithii Torr. & A. Gray, Pacif. Railr. Rep. 2(1): 120. 1857.
Astragalus beckwithii Torr. & A. Gray var. beckwithii. 2n=22
Astragalus beckwithii Torr. & A. Gray var. purpureus M.E. Jones, Zoë 3(4): 288. 1893.
Astragalus beckwithii Torr. & A. Gray var. sulcatus Barneby, Mem. New York Bot. Gard. 13: 784. 1964.
Astragalus beckwithii Torr. & A. Gray var. weiserensis M.E. Jones , Zoë 5(3): 47–48. 1900.

    Synonyms: Astragalus weiserensis (M.E. Jones) Abrams.
Astragalus megacarpus (Nuttall) A. Gray, Proc. Amer. Acad. Arts 6: 215. 1864.

    Synonyms: Astragalus megacarpus var. parryi Gray ex S. Wats.
Astragalus oophorus S. Wats., Botany 73. 1871.
Astragalus oophorus S. Wats. var. oophorus. 2n=24
Astragalus oophorus S. Wats. var. caulescens (M.E. Jones) M.E. Jones, Rev. N.-Amer. Astragalus 121. 1923.
Astragalus oophorus S. Wats. var. clokeyanus Barneby, Leafl. W. Bot. 7(8): 194. 1954.
Astragalus oophorus S. Wats. var. lavinii Barneby, Brittonia 36(2): 168–169. 1984.
Astragalus oophorus S. Wats. var. lonchocalyx Barneby, Leafl. W. Bot. 7(8): 194–195. 1954.
Astragalus oophorus S. Watson var. wilkenii S. L. Welsh, N. Amer. Sp. Astragalus 257–258. 2007.

Overview Note
Astragalus michauxii (Kuntze) F.J. Herm, J. Washington Acad. Sciences 38(7): 237. 1948.

    Synonyms: Tium michauxii (Kuntze) Rydb.

 (Se)

Overview Note
Astragalus clevelandii Greene, Bull. Torrey Botanical Club 9(10): 121. 1882.
Astragalus daleae Greene, Pittonia 1(9): 153. 1888.
Astragalus goldmanii M.E. Jones, Rev. North-American Astragalus 281. 1923. n=15
Astragalus hartwegii Benth., Pl. Hartw. 10. 1839. n=14
Astragalus oxyrhynchus Hemsl., Biol. Cent.-Amer.; Botany 1(3): 265. 1879.
Astragalus vaccarum A. Gray, Smithsonian Cont. Knowledge 5(6): 43. 1853. 2n=28

Overview Note
Astragalus didymocarpus Hook. & Arnold., Bot. Beechey Voy. 334. 1838.
Astragalus didymocarpus Hook. & Arnold. var. didymocarpus.

    Synonyms: Astragalus catalinensis Nutt.

Astragalus didymocarpus var. daleoides Barneby.

 2n=24
Astragalus didymocarpus Hook. & Arnold. var. dispermus (Gray) Jepson, Fl. Calif. 2(4): 376–377. 1936.

    Synonyms: Astragalus dispermus Gray , 2n=26.
Astragalus didymocarpus Hook. & Arnold. var. milesianus (Rydb.) Jepson, Fl. Calif. 2(4): 376. 1936.
Astragalus didymocarpus Hook. & Arnold. var. obispoensis (Rydb.) Jepson, Fl. Calif. 2(4): 376–377. 1936.
Astragalus gambelianus E. Sheldon, Minnesota Bot. Stud. 1(1): 21. 1894.

    Synonyms: Astragalus gambelianus ssp. elmeri (Greene) Abrams.

 2n=22

Overview Note
Astragalus molybdenus Barneby, Leafl. W. Bot. 6(3): 70. 1950.
Astragalus molybdenus Barneby var. lackschewitzii (Lavin & Marriott) Welsh, N. Amer. Sp. Astragalus 51. 2007.

    Synonyms: Astragalus lackschewitzii Lavin & Marriott.
Astragalus molybdenus Barneby var. molybdenus

    Synonyms: Astragalus molybdenus Barneby.

Astragalus plumbeus Barneby.
Astragalus molybdenus Barneby var. shultziorum (Barneby) S. L. Welsh, Great Basin Naturalist 58(1): 46. 1998.

    Synonyms: Astragalus shultziorum Barneby.

Overview Note
Astragalus agnicidus Barneby, Madroño 14(1): 39–40. 1957.
Astragalus arthurii M.E. Jones, Contributions to Western Botany 8: 20–21. 1898. 2n=24
Astragalus carminis Barneby, Leaflets of Western Botany 7(2): 37–38. 1953. (exclud), accepted by plant list site
Astragalus congdonii S. Watson, Proc. Amer. Acad. Arts and Sciences 20: 360. 1885. 2n=25, 52
Astragalus howellii A. Gray, Proc. Amer. Acad. Arts 15(1): 46–47. 1879.
Astragalus misellus S. Wats., Proc. Amer. Acad. Arts 21(2): 449. 1886.
Astragalus misellus S. Wats. var. misellus.

    Synonyms: Astragalus howellii var. aberrans (M.E. Jones) Hitchc.
Astragalus misellus S. Wats. var. pauper Barneby, Mem. New York Bot. Gard. 13: 458. 1964.

    Synonyms: Astragalus misellus var. pauper Barneby.

Astragalus howellii var. pauper (Barneby) Isely.
Astragalus oniciformis Barneby, Leaflets of Western Botany 8(5): 122–124. 1957.
Astragalus paysonii (Rydberg) Barneby, Leaflets of Western Botany 4(4): 60. 1944.
Astragalus sinaloae Barneby, Mem. New York Bot. Garden 13: 450–451, map 51. 1964. n=14
Astragalus straturensis M.E. Jones, Contributions to Western Botany 8: 19–20. 1898. n=11
Astragalus toquimanus Barneby, Leaflets of Western Botany 3(5): 111–113. 1942.
Astragalus umbraticus E. Sheldon. Minnesota Botanical Studies 1(1): 23. 1894.

Overview Note
Astragalus hartmanii Rydberg, North American Flora 24(7): 442–443. 1929.
Astragalus helleri Fenzl, Bonplandia 8: 56. 1860.
Astragalus mollissimus Torr., Ann. Lyceum Nat. Hist. New York 2: 178–179. 1827.
Astragalus mollissimus Torr. var. mollissimus. 2n=22, 24
Astragalus mollissimus Torr. var. bigelovii (Gray) Barneby, Mem. New York Bot. Gard. 13: 742. 1964.

    Synonyms: Astragalus bigelovii Gray, n=11+2B.

Astragalus bigelovii var. typicus Barneby.

 n=11
Astragalus mollissimus Torr. var. coryi Tidestrom, Proc. Biol. Soc. Washington 50(7): 21. 1937.
Astragalus mollissimus Torr. var. earlei (Greene ex Rydb.) Tidestrom , Proc. Biol. Soc. Wash. 48(9): 40. 1935. n=11
Astragalus mollissimus Torr. var. marcidus (Greene ex Rydb.) Barneby, Mem. New York Bot. Gard. 13: 743. 1964.

    Synonyms: Astragalus marcidus Greene ex Rydb.,n=11

Astragalus bigelovii var. marcidus (Greene ex Rydb.) Isely.
Astragalus mollissimus Torr. var. matthewsii (S. Wats.) Barneby, Mem. New York Bot. Gard. 13: 746. 1964.

    Synonyms: Astragalus matthewsii S. Wats.

 n=11
Astragalus mollissimus Torr. var. mogollonicus (Greene) Barneby, Mem. New York Bot. Gard. 13: 745. 1964.

    Synonyms: Astragalus bigelovii var. mogollonicus (Greene) Barneby.
Astragalus mollissimus Torr. var. thompsoniae (S. Wats.) Barneby, Mem. New York Bot. Gard. 13: 747. 1964.

    Synonyms: Astragalus bigelovii var. thompsoniae (S. Wats.) M.E. Jones.

Astragalus thompsoniae S. Wats.
Astragalus nutriosensis M. J. Sanderson, Madroño 35(4): 325–328. 1988.

Overview Note
Astragalus monoensis Barneby, Leafl. W. Bot. 4(4): 55–59. 1944. n=11
Astragalus perianus Barneby, Mem. New York Bot. Garden 13: 972–973, map 134. 1964.
Astragalus pulsiferae Gray, Proc. Amer. Acad. Arts 10: 69–70. 1874.
Astragalus pulsiferae Gray var. pulsiferae.
Astragalus pulsiferae Gray var. suksdorfii (T.J. Howell) Barneby, Aliso 4(1): 131. 1958.
Astragalus ravenii Barneby, Aliso 4(1): 131–132. 1958.

   Synonyms: Astragalus monoensis var. ravenii (Barneby) Isely.

 2n=24
Astragalus tiehmii Barneby, Brittonia 36(2): 169–171, f. 1. 1984.

Overview Note
Astragalus neglectus (Torrey & A. Gray) E. Sheldon.

   Synonyms: Astragalus cooperi Gray.

Phaca neglecta Torr. & Gray.

 2n=22

Overview Note
Astragalus johannis–howellii Barneby, Leaflets of Western Botany 8(5): 124–125. 1957. 2n=22
Astragalus mulfordiae M.E. Jones, Cont. Western Botany 8: 18. 1898.
Astragalus peckii Piper, Proc. Biol. Soc. of Washington 37(13): 92. 1924.
Astragalus yoder-williamsii Barneby, Brittonia 32(1): 30–32. 1980.

Overview Note
Astragalus nevinii A. Gray, Proc. Amer. Acad. Arts 21(2): 412. 1886.
Astragalus traskiae Eastwood, Proc. Calif. Acad. Sciences, Series 3, 1: 102–103. 1898.

Overview Note
Astragalus serenoi (Kuntze) E. Sheldon, Minnesota Bot. Stud. 1(3): 130. 1894.
Astragalus serenoi (Kuntze) E. Sheldon var. serenoi. 2n= 22, 24?
Astragalus serenoi (Kuntze) E. Sheldon var. shockleyi (M.E. Jones) Barneby, Brittonia 36(2): 168. 1984.

   Synonyms: Astragalus shockleyi M.E. Jones.
Astragalus serenoi (Kuntze) E. Sheldon var. sordescens Barneby, Leafl. W. Bot. 7(8): 195. 1954.

Overview Note
Astragalus flavus Nuttall, Fl. N. Amer. 1(2): 335. 1838.
Astragalus flavus Nuttall var. argillosus (M. E. Jones) Barneby, Mem. New York Bot. Gard. 13: 401. 1964.
Astragalus flavus Nuttall var. flavus.

   Synonyms: Astragalus confertiflorus Gray, 2n=24.

Astragalus confertiflorus var. flaviflorus (Kuntze) M.E. Jones.

 2n=24
Astragalus flavus Nuttall var. higginsii S. L. Welsh, Utah Fl. (ed. 3) 373. 2003.
Astragalus flavus var. candicans Gray, Proc. Amer. Acad. Arts 12: 54–55. 1876.
Astragalus moencoppensis M.E. Jones, Zoë 2(1): 12. 1891.
Astragalus sophoroides M.E. Jones, Zoë 2(1): 12. 1891.

Overview Note
Astragalus laxmannii Jacq., Hort. Bot. Vindob. 3: 22. 1776. One var. in Old world, see Old World list, Introduced
Astragalus laxmannii Jacq. var. robustior (Hook.) Barneby & Welsh, Great Basin Naturalist 56(1): 85. 1996.

   Synonyms: Astragalus adsurgens ssp. robustior (Hook.) Welsh.

Astragalus adsurgens var. robustior Hook.

Astragalus striatus Nutt., 2n=32.

Astragalus sulphurescens Rydb.

Astragalus laxmanii subsp. robustior (Hook.) Podlech.

 2n=32
Astragalus laxmannii Jacq. var. tananaicus (Hultén) Barneby & Welsh, Great Basin Naturalist 56(1): 85. 1996.

    Synonyms: Astragalus adsurgens ssp. viciifolius (Hultén) Welsh.

Astragalus adsurgens var. tananaicus (Hultén) Barneby.

Astragalus laxmanii subsp. viciifolius (Welsh) Podlech.

Astragalus viciifolius Hultén, 2n=32.

Overview Note
Astragalus oocalycis M.E. Jones, Cont. Western Botany 8: 10–11. 1898. 2n=24

Overview Note
Astragalus eucosmus B.L. Robinson, Rhodora 10(110): 33. 1908.

    Synonyms: Astragalus eucosmus ssp. sealei (Lepage) Hultén.

Astragalus eucosmus var. facinorum Fern.

Astragalus parviflorus (Pursh) MacM.

Astragalus sealei Lepage, 2n=16 .

Atelophragma elegans (Hook.) Rydb.

Phaca parviflora.

 2n=32, (N+)
Astragalus robbinsii (Oakes) Gray, Manual (ed. 2) 98. 1856.
Astragalus robbinsii (Oakes) Gray var. robbinsii. 2n=16, (N+)
Astragalus robbinsii (Oakes) Gray var. alpiniformis (Rydb.) Barneby ex Hitchc., Vasc. Pl. Pacif. N.W. 3: 258. 1961.

   Synonyms: Astragalus alpinus var. alpiniformis (Rydb.) Rydb. ex M.E. Peck.

Atelophragma alpiniforme Rydb.
Astragalus robbinsii (Oakes) Gray var. harringtonii (Rydb.) Barneby, Mem. New York Bot. Gard. 13: 132. 1964.

    Synonyms: Astragalus harringtonii (Rydb.) Coville & Standl. ex Hultén.

Astragalus robbinsii ssp. harringtonii (Rydb.) Hultén.

Atelophragma harringtonii Rydb.
Astragalus robbinsii (Oakes) Gray var. jesupii Egglest. & Sheldon, Minnesota Bot. Stud. 1(3): 155–156. 1894.

    Synonyms: Astragalus jesupii (Egglest. & Sheldon) Britt.
Astragalus robbinsii (Oakes) Gray var. minor (Hook.) Barneby, Mem. New York Bot. Gard. 13: 125. 1964.

    Synonyms: Astragalus blakei Egglest.

Astragalus collieri (Rydb.) Porsild.

Astragalus macounii Rydb.

Astragalus robbinsii var. blakei Egglest.& Barneby.
Astragalus robbinsii (Oakes) Gray var. occidentalis S. Wats., Botany 70. 1871.

Synonyms: Astragalus occidentalis (S. Wats.) M.E. Jones, 2n=32.

Overview Note
Astragalus gilviflorus Sheldon, Minnesota Bot. Stud. 1(1): 21. 1894.
Astragalus gilviflorus Sheldon var. gilviflorus.

    Synonyms: Astragalus triphyllus Pursh, 2n=22.

Orophaca triphylla Britt.

 2n=22,24
Astragalus gilviflorus Sheldon var. purpureus Dorn, Vasc. Pl. Wyoming 2971988.
Astragalus hyalinus M.E. Jones.

    Synonyms: Orophaca hyalina (M.E. Jones) Isely.
Astragalus hyalinus M.E.Jones var. glabratus Evert ex Dorn, Phytologia, 2014, ?????
Astragalus proimanthus Barneby, Memoirs of The New York Botanical Garden 13: 1153–1154. 1964.

     Synonyms: Orophaca proimantha (Barneby) Isely.

Overview Note
Astragalus asclepiadoides M.E. Jones, Zoë 2(3): 238–239. 1891.

Overview Note
Astragalus pachypus Greene, Bull. Calif. Acad. Sci. 1(3): 157. 1885.
Astragalus pachypus Greene var. pachypus.  2n=20
Astragalus pachypus Greene var. jaegeri Munz & Mc Burney ex Munz, Bull. S. Calif. Acad. Sci. 31(2): 67. 1932.

Overview Note
Astragalus panamintensis E. Sheldon, Cont. United States National Herbarium 4: 87. 1893.

Overview Note
Astragalus grayi Parry ex S. Watson, American Naturalist 8(4): 212. 1874. 2n=44
Astragalus linifolius Osterhout, Bulletin of the Torrey Botanical Club 55(1): 75. 1928.
Astragalus nelsonianus Barneby, Mem. New York Botanical Garden 13: 426–427. 1964.

   Synonyms: Astragalus pectinatus var. platyphyllus M.E. Jones.
Astragalus osterhoutii M.E. Jones, Rev. North-American Astragalus 251. 1923. 2n=22
Astragalus pectinatus (Hook.) Dougl. ex G. Don, Gen. Hist. 2: 257. 1832.

    Synonyms: Cnemidophacos pectinatus Hook. Rydb.

 2n=22, (Se)
Astragalus rafaelensis M.E. Jones, Rev. North-American Astragalus 146. 1923. 2n=22, (Se)
Astragalus saurinus Barneby, Leaflets of Western Botany 8(1): 17–20. 1956.
Astragalus toanus M.E. Jones, Zoë 3(4): 296. 1893.
Astragalus toanus M.E. Jones var. toanus.  2n=22
Astragalus toanus M.E. Jones var. scidulus Welsh & Atwood, Rhodora 95: 403. 1993.

Overview Note
Astragalus echinatus Murray, Hort. Bot. Stirp. 222. ????? 2n=28

Overview Note
Astragalus amblytropis Barneby, American Midland Naturalist 41(2): 501–502. 1949.
Astragalus amnis-amissi Barneby ex Hitchc., Vas. Plants Pacific Northwest 3: 219. 1961. n=12
Astragalus platytropis Gray, Proc. Amer. Acad. Arts and Sciences 6: 526–527. 1865. (**)

Overview Note
Astragalus sclerocarpus A. Gray, Proc. Amer. Acad. Arts 6: 225. 1864. 2n=22
Astragalus sinuatus Piper, Bull. Torrey Botanical Club 28(1): 40. 1901.

    Synonyms: Astragalus whitedii Piper.

 n=11
Astragalus speirocarpus A. Gray, Proc. Amer. Acad. Arts 6: 225. 1864. n=11

Overview Note
Astragalus bodinii E. Sheldon, Minnesota Bot. Stud. 1(3): 122. 1894.

   Synonyms: Astragalus bodinii var. yukonis (M.E. Jones) Boivin.

Astragalus stragulus Fern.

Astragalus yukonis M.E. Jones, 2n=24.

Phaca bodinii (Sheldon) Rydb. ex Small.

 2n=32
Astragalus polaris Bentham, Trans. Linn. Soc. London 23(2): 323–324. 1861.

    Synonyms: Astragalus amblyodon (Rydb.) Hultén.

 2n=24 probably in Asia, Fl. Pan., 2017.

Overview Note
Astragalus porrectus S. Watson, U. S. Geol. Exp. Vol. 5, Botany 75. 1871.

Overview Note
Astragalus beathii C.L. Porter, Madroño 6(1): 18–20, pl. 3. 1941. 2n=24, (Se.)
Astragalus crotalariae (Bentham) A. Gray, Proc. Amer. Acad. Arts 6: 216. 1864. 2n=24, (Se)
Astragalus cutleri (Barneby) S. L. Welsh. Great Basin Naturalist 58(1): 51. 1998.
Astragalus preussii Gray var. cutleri Barneby, Great Basin Naturalist 46(2): 256–257. 1986.
Astragalus debequaeus S. L. Welsh, Great Basin Naturalist 45(1): 31–33. 1985.
Astragalus eastwoodiae M. E. Jones, Zoë 4(4): 368. 1894. 2n=26
Astragalus iselyi S. L. Welsh, Great Basin Naturalist 34(4): 305–307. 1974.
Astragalus mokiacensis Gray, Proc. Amer. Acad. Arts and Sci. 13: 367. 1878., not Androw, Alexander, 2008 ??

    Synonyms: Astragalus lentiginosus var. mokiacensis (Gray) M.E. Jones.
Astragalus pattersonii A. Gray, Bull. U.S. Geol. Geogr. Surv. Territ. 2(3): 235–2. 1876. 2n=24
Astragalus praelongus Sheldon, Minnesota Bot. Stud. 1(1): 23. 1894.
Astragalus praelongus var. avonensis (Welsh & Atwood) Welsh, N. Amer. Sp. Astragalus 190. 2007.
Astragalus praelongus Sheldon var. praelongus.

    Synonyms: Astragalus pattersonii var. praelongus (Sheldon) M.E. Jones.

Astragalus recedens (Greene ex Rydb.) C.L. Porter.

 2n=24, n=11, (Se)
Astragalus praelongus Sheldon var. ellisiae (Rydb.) Barneby, Mem. New York Bot. Gard. 13: 588. 1964. n=12
Astragalus praelongus Sheldon var. lonchopus Barneby, Leafl. W. Bot. 9(6): 90–91. 1960.
Astragalus preussii Gray, Proc. Amer. Acad. Arts 6: 222. 1864.
Astragalus preussii Gray var. preussii.

     Synonyms: Astragalus preussii var. latus M.E. Jones.

 2n=24, (Se)
Astragalus preussii Gray var. laxiflorus Gray, Proc. Amer. Acad. Arts 13: 369–370. 1878.

    Synonyms: Astragalus crotalariae var. davidsonii (Rydb.) Munz & McBurney.
Astragalus sabulosus M.E. Jones, Zoë 2(3): 239–240. 1891.

Synonyms: Astragalus sabulosus M. E. Jones var. vehiculus S. L. Welsh.

 2n=26
Astragalus vehiculus (S.L.Welsh) S.L.Welsh, A Utah Flora (ed. 5) 432. 2015.

Overview Note
Astragalus accidens S. Wats., Proc. Amer. Acad. Arts 22(2): 471. 1887.
Astragalus accidens S. Wats. var. accidens.
Astragalus accidens S. Wats. var. hendersonii M.E. Jones, Rev. N.-Amer. Astragalus 164. 1923.

     Synonyms: Astragalus pachystachys Rydb.

Astragalus watsonii Sheldon.

Overview Note
Astragalus casei Gray, Geol. Survey Calif, Bot. 1: 154. 1876., descry. by Brewer & S. Wats. 2n=22
Astragalus pterocarpus S. Wats., U. S. Geol. Expol. Vol. 5, Botany 71. 1871. 2n=22
Astragalus tetrapterus A. Gray, Proc. Amer. Acad. Arts 13: 369. 1878.

     Synonyms: Astragalus cinerascens (Rydb.) Tidestrom.

Astragalus tetrapterus var. capricornus M.E. Jones.

Astragalus tetrapterus var. cinerascens (Rydb.) Barneby.

 2n=22

Overview Note
Astragalus brandegeei Porter, Synopsis of the Flora of Colorado 24. 1874. n=11
Astragalus quinqueflorus S. Watson, Proc. Amer. Acad. Arts and Sciences 21: 450. 1886.

    Synonyms: Phaca quinqueflora (Watson) Rydberg.

 2n=22

Overview Note
Astragalus reflexus Torrey & A. Gray, A Flora of North America: containing . . . 1(2): 334. 1838.

Overview Note
Astragalus ackermanii Barneby, Brittonia 32(1): 26–28. 1980.
Astragalus reventus Gray, Proc. Amer. Acad. Arts 15(1): 40. 1880.
Astragalus adanus A. Nels., Botanical Gazette 53(3): 222. 1912.
Astragalus arrectus Gray, Proc. Amer. Acad. Arts 8: 289–290.1870.

    Synonyms: Astragalus palousensis Piper.

 2n= 24
Astragalus atropubescens J. M. Coulter & Fisher, Bot. Gazette 18(8): 300. 1893.

    Synonyms: Astragalus arrectus var. kelseyi (Rydb.) M.E. Jones.

 n=11
Astragalus eremiticus Sheldon, Minnesota Bot. Stud. 1(3): 161. 1894.

    Synonyms: Astragalus eremiticus var. ampullarioides Welsh.

Astragalus eremiticus var. malheurensis (Heller) Barneby.

Astragalus eremiticus var. spencianus M.E. Jones.

Astragalus malheurensis Heller.

 n=11. “sect. Emeriticus”
Astragalus kelseyae D. L. Corbin, Madroño 58(3): 185–188. 2011. (**)

    Synonyms: Astragalus Kelseya uniflora ??
Astragalus obscurus S. Watson, U.S. Geol. Expol. Vol. 5, Botany 69. 1871.
Astragalus orcuttianus S. Watson, Proc. Amer. Acad. Arts 20: 361. 1885.

    Synonyms: Astragalus orcuttianus var. gregorius Jones.
Astragalus remotus (M.E. Jones) Barneby, Leaflets of Western Botany 4(4): 59. 1944.
Astragalus riparius Barneby, Amer. Midland Naturalist 55(2): 490–491. 1956. 2n=24
Astragalus scaphoides (M.E. Jones) Rydb., Mem. New York Botanical Garden 1: 241. 1900.
Astragalus sheldonii (Rydb.) Barneby, Amer. Midland Naturalist 55(2): 489. 1956.

    Synonyms: Astragalus conjunctus var. sheldonii (Rydb.) M.E. Peck.

Astragalus reventus var. sheldonii (Rydb.) C.L. Hitchc.

 2n=24
Astragalus terminalis S. Watson, Proc. Amer. Acad. Arts 17: 370. 18882.

Overview Note
Astragalus Rupertii Villarreal & Garranza, Brittonia 46(4) :335-339. 1994.

Overview Note
Astragalus sagitticarpus A. E. Estrada, Villarreal & Encina, Phytotaxa 428 (3): 166. 2020., (**)

Overview Note
Astragalus bibullatus Barneby & Bridges, Brittonia 39(3): 359–362. 1987.
Astragalus crassicarpus Nutt., Cat. Pl. Upper Louisiana no. 6. 1813.
Astragalus crassicarpus Nutt. var. berlandieri Barneby, Amer. Midl. Naturalist 55(2): 498. 1956.

    Synonyms: Astragalus mexicanus DC. , 2n=64.

Geoprumnon mexicanum (A. DC.) Rydb. ex Small.
Astragalus crassicarpus Nutt. var. cavus Barneby, Mem. New York Bot. Gard. 13: 759–760. 1964.
Astragalus crassicarpus Nutt. var. crassicarpus.

    Synonyms: Astragalus caryocarpus Ker-Gawl.

Astragalus succulentus Richards.

Geoprumnon crassicarpum (Nutt.) Rydb. ex Small.

Geoprumnon succulentum (Richards.) Rydb.

 2n=22, (Se.)
Astragalus crassicarpus Nutt. var. paysonii (Kelso) Barneby, Amer. Midl. Naturalist 55(2): 497. 1956.
Astragalus crassicarpus Nutt. var. trichocalyx (Nutt.) Barneby, Ill. Fl. N.E. U.S. 2: 421. 1952.

    Synonyms: Astragalus mexicanus var. trichocalyx (Nutt.) Fern.

Astragalus trichocalyx Nutt.
Astragalus gypsodes Barneby, Amer. Midland Naturalist 55(2): 499–500. 1956.
Astragalus plattensis Nutt., Fl. N. Amer. 1(2): 332. 1838.

    Synonyms: Astragalus pachycarpus Torr. & Gray.

Geoprumnon plattense (Nutt.) Rydb.

 2n=22?
Astragalus sanguineus Rydb., North American Flora 24(7): 443. 1929.

Overview Note
Astragalus scalaris S. Watson, Proc. Amer. Acad. Arts 23(2): 270–271. 1888.

    Synonyms: Astragalus scalarius var. quercetinus Jones.

Overview Note
Astragalus calycosus Torr. ex S. Wats., Botany (Fortieth Parallel) 66–67. 1871.
Astragalus calycosus Torr. ex S. Wats. var. calycosus.

     Synonyms: Astragalus brevicaulis Nelson.

Astragalus calycosus var. mancus (Rydb.) Barneby.

 2n=22
Astragalus calycosus Torr. ex S. Wats. var. monophyllidius (Rydb.) Barneby, Leafl. W. Bot. 3(5): 107. 1942.
Astragalus calycosus Torr. ex S. Wats. var. scaposus (Gray) M.E. Jones, Zoë 4(1): 26. 1893. n=11

Overview Note
Astragalus brazoensis Buckley, Proc. Acad. Nat. Sci. Philadelphia 13(12): 452. 1862. 2n=22
Astragalus scutaneus Barneby, American Midland Naturalist 55: 502. 1956.

Overview Note
Astragalus castetteri Barneby, Mem. New York Botanical Garden 13: 229–230. 1964. n=11
Astragalus coriaceus Hemsl., Biologia Centrali-Americana; . Botany 1(3): 263–264. 1879.

    Synonyms: Astragalus antoninus Watson.

 n=11
Astragalus flexuosus (Hook.) Dougl. ex G. Don, Gen. Hist. 2: 256. 1832.
Astragalus flexuosus (Hook.) Dougl. ex G. Don var. diehlii (M.E. Jones) Barneby, Leafl. W. Bot. 4(4): 54. 1944.

    Synonyms: Astragalus flexuosus var. diehlii (M.E. Jones) Barneby.
Astragalus flexuosus (Hook.) Dougl. ex G. Don var. flexuosus.

   Synonyms: Astragalus flexuosus var. elongatus (Hook.) M.E. Jones.

Astragalus flexuosus var. sierrae-blancae (Rydb.) Barneby.

Pisophaca flexuosa (Hook.) Rydb.

 n=11,2n=22,16?
Astragalus flexuosus (Hook.) Dougl. ex G. Don var. greenei (Gray) Barneby, Leafl. W. Bot. 9(6): 91. 1960.

    Synonyms: Astragalus greenei Gray.

Astragalus stictocarpus (Rydb.) Tidestrom.

 n=11
Astragalus fucatus Barneby, Leaflets of Western Botany 9(6): 89–90. 1960. n=11
Astragalus gracilis Nuttall, Gen. N. Amer. Pl. 2: 100. 1818.
Astragalus gracilis var. microlobus (A.Gray) S.L.Welsh, N. Amer. Sp. Astragalus 72. 2007.

    Synonyms: Astragalus microlobus A. Gray.
Astragalus hallii Gray, Proc. Amer. Acad. Arts 6: 224. 1864.
Astragalus hallii Gray var. hallii. n=11
Astragalus hallii Gray var. fallax (M.E. Jones) Barneby, Leafl. W. Bot. 9(6): 91. 1960.

   Synonyms: Astragalus famelicus Sheldon.

 n=11
Astragalus pictiformis Barneby, Leaflets of Western Botany 8(1): 20–22. 1956. n=22
Astragalus proximus (Rydb.) Wootson & Standlley, Contr. U.S. Natl. Herb. 19: 366.1915. n=41
Astragalus puniceus Osterhout, Muhlenbergia 1(9): 140. 1906.
Astragalus puniceus Osterhout var. puniceus
Astragalus puniceus Osterhout var. gertrudis (Greene) Barneby, Mem. New York Bot. Gard. 13: 229. 1964. n=11?
Astragalus shevockii Barneby, Brittonia 29(4): 376–378, f. 1. 1977.
Astragalus subcinereus Gray, Proc. Amer. Acad. Arts 13: 366. 1878.

    Synonyms: Astragalus silerianus M.E. Jones.

Astragalus silerianus var. cariacus M.E. Jones.

Astragalus subcinereus var. basalticus Welsh.
Astragalus wingatanus S. Watson, Proc. Amer. Acad. Arts 18: 192. 1883. n=11

Overview Note
Astragalus aretioides (M.E. Jones) Barneby, American Midland Naturalist 55(2): 505. 1956.

     Synonyms: Astragalus sericoleucus var. aretioides M.E. Jones.

Orophaca aretioides (M.E. Jones) Rydberg.
Astragalus barrii Barneby, American Midland Naturalist 55(2): 506–507. 1956.

     Synonyms: Orophaca barrii (Barneby) Isely.
Astragalus sericoleucus A. Gray, Amer. J. Sci. Arts, ser. 2 33(99): 410. 1862.
Astragalus tridactylicus A. Gray, Proc. Amer. Acad. Arts 6: 527–528. 1865.

     Synonyms: Astragalus sericoleucus var. tridactylicus (Gray) M.E. Jones.

Orophaca tridactylica (Gray) Rydb.

Overview Note
Astragalus wrightii A. Gray, Boston Journal of Natural History 6(2): 176–177. 1850. 2n=22

Overview Note
Astragalus alvordensis M.E. Jones, Contributions to Western Botany 10: 67–68. 1902.
Astragalus applegatei M.E. Peck, Proc. Biol. Society of Washington 49(24): 111. 1936.
Astragalus solitarius M.E. Peck, Leaflets of Western Botany 4(7): 181–182. 1945.

Overview Note
Astragalus mario-sousae A.E.Estrada, Villarr & Yen Mindez, Brittonia 57(4): 315–317, f. 1. 2005.
Astragalus altus Wooton& Standley, Cont. United States National Herbarium 16(4): 136. 1913.
Astragalus cenorrhynchus Barneby, Brittonia 34(1): 78–80, f. 1. 1982.
Astragalus cobrensis Gray, Smithsonian Contr. Knowl. 5(6): 43. 1853.
Astragalus cobrensis Gray var. cobrensis.
Astragalus cobrensis Gray var. maguirei Kearney, J. Wash. Acad. Sci. 30(5): 218–219. 1949.  n=11
Astragalus egglestonii (Rydberg) Kearney & Peebles, J. Washington Acad. Sciences 29(11): 484. 1939.
Astragalus esperanzae M.E. Jones, Revision of North-American Astragalus 277. 1923.

    Synonyms: Astragalus chapalanus Jonse.

Hamosa sperula Rydberg.
Astragalus guanajuatensis Rzedowski & Rzedowski, Acta Botanica Mexicana 110: 1–19. 2015 (**)
Astragalus guatemalensis Hemsl., Biol. Cent.-Amer., Bot. 1(3): 264. 1879.
Astragalus guatemalensis Hemsl. var. guatemalensis Hemsl.
Astragalus guatemalensis Hemsl. var. brevidentatus barneby, Mem. New York Bot. Gard. 13: 154. 1964. n=15
Astragalus guatemalensis Hemsl. var. lozani Jones, Rev. N.-Amer. Astragalus 189. 1923.
Astragalus hidalgensis (Rydb.) Barneby, Mem. New York Bot. Gard. 13: 174–175. 1964.

    Synonyms: Astragalus hidalgensis var. hidalgensis Rydberg.
Astragalus hintonii Barneby, Mem. New York Bot. Gard. 13: 156–158. 1964.

    Synonyms: Astragalus hintonii var hintonii.
Astragalus jaliscensis (Rydb.) Barneby, Memoirs of The New York Botanical Garden 13: 167–168. 1964.
Astragalus legionensis Barneby, Memoirs of The New York Botanical Garden 13: 155–156. 1964.
Astragalus longissimus (M.E. Jones) Barneby, Mem. New York Bot. Garden 13: 182–183. 1964. n=11
Astragalus lyonnetii Barneby, Mem. New York Botanical Garden 13: 161–162. 1964.
Astragalus micranthus Desv., J. Bot. Agric. 3: 78. 1814.
Astragalus micranthus var. micranthus.
Astragalus micranthus var. seatoni (Jonse) Barneby, Mem. New York Bot. Gard. 13: 187. 1964.
Astragalus microcymbus Barneby, American Midland Naturalist 41(2): 499–500. 1949.
Astragalus pennellianus Barneby, Memoirs of The New York Botanical Garden 13: 169–171. 1964.
Astragalus potosinus Barneby, Mem. New York Bot. Garden 13: 165–167. 1964.
Astragalus pueblae M.E. Jones, Cont. Western Botany 14: 35. 1912.
Astragalus purpusii M.E. Jones, Cont. Western Botany 14: 34–35. 1912.
Astragalus radicans Humb. ex Hornem., Hort. Bot. Hafn. 2: 708. 1815.
Astragalus radicans Humb. ex Hornem. var. radicans. n=15, 2n=30
Astragalus radicans Humb. ex Hornem. var. harshbergii (Rydb.) Barnaby, Mem. New York Bot. Gard. 13: 165. 1964.
Astragalus recurvus Greene, Bull. Calif. Acad. Sciences 1(3): 155–156. 1885.
Astragalus regiomontanus Barneby, Mem. New York Botanical Garden 13: 168–169. 1964.
Astragalus rusbyi Greene, Bull. Calif. Acad. Sci. 1(1): 8. 1884.
Astragalus strigulosus Kunth, Nov. Gen. Sp. (ed. 4) 6: 494. 1823.
Astragalus tioides (Rydb.) Barneby, Mem. New York Botanical Garden 13: 171. 1964.
Astragalus tolucanus Robinson & Seaton, Proc. American Academy of Sciences and Arts 28: 104. 1893 (**)
Astragalus zacatecanus (Rydb.) Barneby, Mem. New York Botanical Garden 13: 167. 1964. n=15

Overview Note
Astragalus succumbens Douglas, Fl. Bor.-Amer. 1(3): 151. 1831. 2n=24

Overview Note
Astragalus tennesseensis A. Gray ex Chapman, Fl. South. United States 98. 1860.

    Synonyms: Astragalus plattensis var. tennesseensis Gray ?

Geoprumnon tennesseense (Gray ex Chapman) Rydb.

 n=12, 2n=22

Overview Note
Astragalus scopulorum Porter, Synopsis of the Flora of Colorado 24–25. 1874. 2n=22

Overview Note
Astragalus asymmetricus E. Sheldon, Minnesota Botanical Studies 1(1): 23. 1894. n=11
Astragalus oxyphysopsis Barneby, Brittonia 28(3): 273–275. 1976.
Astragalus trichopodus (Nutt.) Gray, Proc. Amer. Acad. Arts 6: 218. 1864.
Astragalus trichopodus (Nutt.) Gray var. trichopodus.

     Synonyms: Astragalus trichopodus var. capillipes (M.E. Jones) M.E. Jones.
Astragalus trichopodus (Nutt.) Gray var. lonchus (Jones) Barneby, Mem. New York Bot. Gard. 13: 821. 1964.

     Synonyms: Astragalus leucopsis (Torr. & Gray) Torr. & Gray, 2n=22.

Astragalus trichopodus ssp. leucopsis (Torr. & Gray) Thorne.

 n=11
Astragalus trichopodus (Nutt.) Gray var. phoxus (Jones) Barneby, Mem. New York Bot. Gard. 13: 824. 1964.

     Synonyms: Astragalus antisellii Gray ex Brewer & S. Wats.

Astragalus gaviotus Elmer.
Astragalus trichopodus (Nuttall) A. Gray var. antisellii (A. Gray) Jepson, Man. Fl. Pl. Calif. 572. 1925.

      Synonyms: Astragalus trichopodus ssp. antisellii (Gray ex Brewer & S. Wats.) Thorne.

Overview Note
Astragalus tweedyi Canby, Botanical Gazette 15: 150. 1890.

Overview Note
Astragalus canadensis L., Sp. Pl. 2: 757. 1753.
Astragalus canadensis L. var. brevidens (Gandog.) Barneby, Leafl. W. Bot. 4(9): 238. 1946.

     Synonyms: Astragalus brevidens (Gandog.) Rydb.
Astragalus canadensis L. var. canadensis.

     Synonyms: Astragalus canadensis var. carolinianus (L.) M.E. Jones.

Astragalus canadensis var. longilobus Fassett.

Astragalus carolinianus L.

Astragalus halei Rydb.

 2n=16, (N+)
Astragalus canadensis L. var. mortonii (Nutt.) S. Wats., Botany 68.1871.

     Synonyms: Astragalus mortonii Nutt.
Astragalus castetteri Barneby, Mem. New York Bot. Garden 13: 229–230. 1964.
Astragalus falcatus Lam., Encycl. 1(1): 310. 1783. (N+), see Old World list, Introduced
Astragalus oreganus Nuttal, A Flora of North America: containing 1(2): 335. 1838. (N+)

Overview Note
Astragalus distortus Torr. & Gray, Fl. N. Amer. 1(2): 333. 1838. 2n=26
Astragalus distortus Torr. & Gray var. numentalis

    Synonyms: Holcophacos distortus (Torr. & Gray) Rydb.
Astragalus distortus Torr. & Gray var. engelmannii (Sheldon) M.E. Jones, Rev. N.-Amer. Astragalus 256. 1923.

    Synonyms: Astragalus engelmannii Sheldon.
Astragalus obcordatus Elliiott, Sketch Bot. S. Carolina 2: 227–228. 1823.

    Synonyms: Phaca obcordata (Ell.) Rydb. ex Small.
Astragalus soxmaniorum Lundell, Field & Laboratory 13(1): 3–4. 1945.
Astragalus villosus Michaux, Fl. Bor.-Amer. 2: 67. 1803.

    Synonyms: Phaca intonsa (Sheldon) Rydb. ex Small.

Overview Note
Astragalus woodruffii M.E. Jones , Rev. North-American Astragalus 77–78. 1923.

Overview Note
Astragalus cliffordii S. L. Welsh & N. D. Atwood, Utah Fl. (ed. 3) 839. 2003.
Astragalus concordius S. L. Welsh, Basin Naturalist 58(4): 387–389. 1998.
Astragalus heilii S. L. Welsh & N. D. Atwood, A Utah Flora: Third Edition, revised 839. 2003.
Astragalus zemuensis W.W. Smith, Records of the Botanical Survey of India 4: 185. 1911.
Astragalus sarcocolla Dymock, Pharmac. Indica 1: 476. 1890.
Astragalus strictilobus Barneby, Feddes Repertorium 82: 580. 1971.

Overview Note
Astragalus laccoliticus (M. E. Jones) S. L. Welsh, Great Basin Naturalist 58(1): 53. 1998.
Astragalus spellenbergii A.E.Estrada, S.Gonzalez & Villarreal, Phytotaxa 288(1): 92. 2016. Mexico, (**)
Astragalus asotinensis Björk & Fishbein, Novon 16(3): 299–303. 2006., (**)
Astragalus cochabambensis Ruby,.,  non Gómez-Sosa (**) 2019 ?? Illeg.
Astragalus pilosior Spellenb. & E. W. Anderson, J. Bot. Research Institute of Texas 13(1): 131–140. 2019.,  (**)