448 NORTH AMERICAN FLORA [Volume 24 



20. Astragalus Mortoni Nutt. Jour. Acad. Phila. 7: 19. 1834. 



Astragalus tristis Nutt. ; T. & G. PI. N. Am. 1 : 336. 1838. 

 Astragalus canadensis Morloni S. Wats. Bot. King's Expl. 68. 1871. 

 Tragacantha Morloni Kuntze, Rev. Gen. 946. 1891. 

 Phaca Morloni Piper, Contr. U. S. Nat. Herb. 11: 372. 1906. 



A perennial; stem 3-5 dm. high, strigose, slightly suleate, flexuose; leaves 1-1.5 dm. long, 

 ascending or spreading; stipules deltoid, 6-10 mm. long, acuminate, united around the stem, 

 strigose; leaflets 13-19, oval or elliptic, rounded at the apex, 1-2 cm. long, 4-10 mm. wide, 

 glabrous above, strigose beneath; peduncles 6-16 cm. long; racemes very dense, 3-12 cm. long; 

 bracts lanceolate, 4—5 mm. long; calyx pubescent with mixed white and black hairs, the tube 

 about 4 mm. long, the teeth subulate, the upper 1.5, the lower 2.5 mm. long; corolla ochroleu- 

 cous, 12-13 mm. long; banner obovate, slightly arched at the middle; wings shorter, the blade 

 obliquely oblanceolate, with a large basal auricle ; keel-petals shorter, the blade broadly lunate, 

 with a large auricle; pod oblong, pubescent, 15-20 mm. long, contracted above into a straight 

 beak, suleate on the lower suture. 



Type locality: Sources of the Missouri [Montana]. 



Distribution: Mountains, from Montana to Washington, northern California, and western 

 Wyoming. 



Illustration: M. E. Jones, Rev. Astrag. pi. 40. 



21. Astragalus pachystachys Rydberg, non. nov. 



Astragalus spicatus Nutt.; T. & G. Fl. N. Am. 1: 336. 1838. Not A. spicatus Pall. 1773. 

 Astragalus canadensis Morloni S. Wats. Bot. King's Expl. 68, in part. 1871. 



A perennial, with a creeping rootstock ; stem 2-6 dm. high, striate and strigose, rather 

 strict; leaves 6-15 cm. long, ascending; stipules deltoid, acuminate, 5-7 mm. long; leaflets 

 11-15, elliptic, 1-2.5 cm. long, rounded at the apex, glabrous above, strigose beneath; peduncles 

 5-10 cm. long; racemes dense, 3-7 cm. long; bracts lanceolate, 4-6 mm. long; pedicels very 

 short; flowers reflexed; calyx white-hairy, the tube 6 mm. long, 3 mm. broad, the upper two 

 teeth deltoid, 1.5 mm. long, twice as broad as the lower ones, which are subulate, 2 mm. long; 

 corolla ochroleucous; banner 12-14 mm. long, moderately arched; wings only slightly shorter, 

 the blade falcate ; oblanceolate, with a long reflexed auricle ; keel-petals nearly as long, the blade 

 broadly obliquely lunate, rounded at the apex; pod densely strigose, oblong, abruptly con- 

 tracted at the apex, with the beak curved downward, about 4 mm. thick and wide; seeds 

 brown, obliquely round-reniform, 2 mm. long. 



Type locality: "Rocky Mountains." (Probably Wyoming]. 



Distribution: Hills, from Black Hills of South Dakota to British Columbia, Washington, 

 Nevada, and Colorado. 



22. Astragalus Torreyi Rydberg, sp. nov. 



A perennial; stem 3-5 dm. high, somewhat angled, glabrous or sparingly strigose, flexuose; 

 leaves 8-12 cm. long, spreading; stipules scarious, lance-deltoid or lanceolate, 8-10 cm. long; 

 leaflets 17-21, oblong or lance-oblong, acutish at each end, or obtuse at the apex, 1-2.5 cm. 

 long, 3-8 mm. wide, strigose on both sides, in age glabrate above; peduncles 7-10 cm. long; 

 racemes dense, 3-6 cm. long; bracts lanceolate, about 5 mm. long; calyx short-pubescent, the 

 tube 1.5-2 mm. long, the upper two teeth deltoid, the lower three subulate; corolla ochroleu- 

 cous, 12-15 mm. long; banner narrowly obovate, slightly arched ; wings nearly as long, the blade 

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

 rounded at the apex; pod oblong, subterete, abruptly acute at each end, short-pubescent, 

 suleate on the lower suture, slightly curved, the beak slightly recurved. 



Type collected near Empire City, Nevada, in 1865, Torrey (herb. Columbia University and 

 N. Y. Bot. Gard.). 



Distribution: Nevada, eastern California, and southern Idaho. 



