Part 7, 1929] FABACEAE: GALEGEAE 449 



23. Astragalus oreganus Nutt. ; T. & G. PI. N. Am. 

 1:335. 1838. 



Astragalus ventorum A. Gray; Parry, Am. Nat. 8: 212. 1874. 

 Tragacanlha ventorum Kuntze, Rev. Gen. 949. 1894. 



A perennial, with an underground rootstock; stems branched, flexuose, canescent-strigose, 

 1-1.5 dm. high; leaves 7-15 cm. long, ascending; stipules large, deltoid, 5-S mm. long, free 

 from the petiole, connate around the stem, somewhat scarious, strigose; leaflets 9-21, obovate 

 or broadly oval, often truncate or retuse at the apex, 8-20 mm. long, 5- 1 2 mm. wide, canescent 

 peduncles 3-S cm. long; racemes 3-9 cm. long; bracts lanceolate, scarious, 5-7 mm. long 

 calyx short-villous, the tube 6-7 mm. long, 4 mm. broad, the teeth subulate, 2 mm. long 

 corolla ochroleucous or sulphur-yellow, 15-18 mm. long ; banner broadly obovate, rather strongly 

 arcuate; wings nearly as long, the blade oblong, with a rounded basal auricle; keel-petals much 

 shorter, the blade broadly lunate, strongly arched towards the rounded apex; pod slightly 

 strigose, oblong, 12-18 mm. long, slightly curved, the upper suture prominent, the lower 

 slightly sulcate. 



Type locality: "Plains of the Rocky Mountain Range, towards the Oregon." 

 Distribution: Wyoming and eastern Idaho. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 37, f. 127. 



3. Hypoglottides. Plants perennial, with a cespitose caudex; stems elongate, leafy; 

 leaves green, strigose, ascending or spreading; racemes dense, spike-like; calyx subcylindric.the 

 teeth one third to two thirds as long as the tube; corolla purple or ochroleucous, the banner 

 moderately arched at the middle; pod ovoid, short and coriaceous, several- to many -seeded, 

 deeply sulcate on the lower suture, strongly ascending, cordate in cross-section. 



24. Astragalus striatus Nutt.; T. & G. Fl. N. Am. 1: 330. 1538. 



Astragalus Laxmanni Nutt. Gen. 2: 99. 1818. Not A. Laxmanni Jacq. 1776. 



Astragalus adsurgens Hook. Fl. Bor. Am. 1: 149. 1831. Not A. adsurgens Pall. 1800. 



Astragalus adsurgens robustior Hook. Fl. Bor. Am. 1: 149. 1831. 



Astragalus hypogloitis robuslus Hook. Lond. Jour. Bot. 6: 210. 1847. 



Astragalus nitidus Dougl; (Hook. Fl. Bor. Am. 1: 149, as synonym. 1831) M. E. Jones, Proc. Calif. 



Acad. II. 5: 646. 1895. 

 Phaca adsurgens Piper, Contr. U. S. Nat. Herb. II: 372. 1906. 

 Astragalus adsurgens pauperculus Blankinship, Mont. Agr. Coll. Stud. 1:72 [depauperate form]. 



1895. 

 Astragalus nitidus robustior M. E. Jones, Rev. Astrag. 170, in part. 1923. 



A perennial, with a cespitose caudex; stems several, decumbent at the base, 2-4 dm. high, 

 sparingly strigose; leaves 7-12 cm. long, ascending; stipules deltoid, distinct, scarious, about 

 5 mm. long; leaflets 13-25, oblong or elliptic, 5-20 cm. long, 4-7 mm. wide, acute or obtuse, 

 silky-strigose beneath, less so or glabrate above; peduncles 6-10 cm. long; racemes dense, 3-6 

 cm. long; bracts lanceolate, 3-5 mm. long; calyx strigose with short black and white hairs 

 mixed, the tube 4-6 mm. long, the teeth 3-4 mm. long, subulate; corolla light-purple, sometimes 

 white, 15-18 mm. long; banner oblong-obovate, moderately arched; wings shorter, the blade 

 oblong-oblanceolate, with a large basal auricle; keel-petals much shorter, the blade broadly 

 lunate, rounded at the apex; pod oblong, 7-10 mm. long, 3-4 mm.wide and as thick, strigose, 

 nearly straight, deeply sulcate on the lower suture. 



Type locality: Plains and hills of the Platte and Missouri. 



Distribution: Manitoba and Minnesota to Nebraska, New Mexico, and Washington. 



Illustrations: M. E. Jones, Rev. Astrag. pi. 40; Britt. & Brown, 111. Fl./. 2131; ed. 2./. 2536 

 (both as .1. adsurgens); Fl. Neb. 21: pi. 10, f. 42^46; Clements, Rocky Mt. Fl. pi. 28, f. 6 (as A. 

 hy poglotiis) . 



25. Astragalus Chandonnetii Lunell, Am. Midi. Nat. 

 2: 127. 1911. 



Astragalus adsurgens albiflorus Blankinship, Mont. Agr. Coll. Stud. 1: 71. 1905. Not A. albi- 

 floras Gand. 1902. 



A perennial, with a cespitose caudex; stems 2-4 dm. high, strigose, flexuose; leaves ascend- 

 ing, 5-10 cm. long; stipules scarious, deltoid, acuminate, 5-10 mm. long; leaflets 1 1-19, oblong 



