Sheldon: SPECIES OF astragalus. 165 



Astragalus laxmanni Jacq. Hort. Vindob. 3:22. 1776. 



A. adsurgens Pall. Astrag. 40. 1800. 

 A. synacus FAT.L.. Reise. 2:559. 1771. 

 Not ^. s2/)iacws Linn. Spec. 759. 1753. 



A. semibilocularis DC. Astrag. 136. 1802. 



A. adsurgens Pall. var. prostratus FiscH. Hort. Gar. ex. DC Prod. 



2:287. 1825. 

 A. microphyllus Georgi. Beschr. Russ. Nachtr. 296. 1802. 

 A. laxmanni'i^UTT. Gen. 2:99. 1818. 

 A. striatus Nutt. in T. and G. Fl. N. Am. 1 : 330. 1838. 

 A. adsurgens Fat,!., var. laxmanni Trautv. in Bull. Mosq. 1: 



507. 1860. 

 A. hypoglottis Linn. var. robustus Hook, in Lond. Journ. Bot. 6. 



210. 1854. 

 Tragacantha adsurgens OK. Rev. Gen. PI. 2 : 942. 1891. 



Minnesota and the Saskatchewan to British Columbia and 

 Washington, south to Oregon and western Kansas. 



Astragalus hypoglottis Linn. Mant. '2 : 274. 1771. 



A. glauxFAh-L. Reise. 2:464. 1771. 



A. arenarius Pall. Reise. 2: 464. 1771. 



^. o^j-esiis DouGL. in G. Don. Gen. Syst.Gard. and Bot. 2:257. 



1832. 

 A. goniatus Nutt. in T. and G. Fl. N. Am. 1 : 330. 1838. 

 Tragacantha hypoglottis OK. Rev. Gen. PI. 2 : 945. 1891 . 



Hudson bay to Alaska, south in the United States from 

 Washington and Montana to Minnesota, Nebraska and southern 

 Colorado. 



Astragalus virgultulus n. sp. 



Perennial, bushy, branching from the base, nearly glabrous; 

 stems 15 to 20 cm. in length, erect, forming a somewhat dense, 

 obconical bush, white at the top, 13-18 cm. broad, striate- 

 angled; leaves 5 to 6 cm. in length, rachis trisulcate; leajleis 

 5 to 8 mm. in length, in seven to nine pairs, oblong- lanceolate, 

 obtuse or acute, smooth above, but with scattered, appressed 

 hairs beneath; siipules foliaceous, oblong lanceolate from a 

 deltoid clasping base: peduncles striate, not thicker than the 

 stems, abruptly capitate; flowers 10 to 15 mm. in length, erect; 

 calyx short-campanulate, the tube slightly pubescent with 

 white hairs, the linear teeth equalling in length the tube and 

 black-pubescent; corolla ochroleucous, tipped with purple; 

 legume 10 to 12 mm. in length, elliptic-ovate, strigulose pubes- 

 cent with white, spreading hairs, concave dorsally, bilocular, 

 four to eight seeded. 



