493 



In woods: Cnsler, altitude 1,700 m., June 3; Little Elk Canyon, altitude 1.200 ni., 

 June 28; Lead t'ity, altitude 1,600 ui., July 6; Rochfoid, altitude 1,700 ui., July 11 

 (No. 621). 



Astragalus lotiflorus Hook. Fl. Bor. Ainer. i, 152 (1834). 



In nearly all the specimens of my collection the flowers are in short, capitate 

 racemes, but at least in some a part of the flowers are sessile, the plant thus 

 approaching the forma brachypufi Gray. Mr. E. P. Sheldon has raised the latter to 

 specific rank, but it can scarcely be regarded even as a variety, and Dr. Gray seems 

 to me to have disposed of it correctly. 



Hot Springs, altitu<le 1,100 m., June 16 (No. 625). 



Astragalus niissourlensis Nutt. Gen. ii, 99 (1818). 



The specimens from the Black Hills are. like those from Nebraska, greener than the 

 species generally is farther south. Hot Springs, altitude 1,100 m., June 13 (No. 626). 



A few specimens collected at Hermosa, altitude 1,000 m., June 23, dift'er considera- 

 bly from the common form. The stem is not cespitose, but ascending, less hairy; 

 leaflets larger, obovate ; flowers racemose or subcapitate on a long peduncle. In gen- 

 eral appearance, color of the flowers, etc., they resemble A. adsunjens, but the heads 

 are more lax, the leaflets broader, and the plant more hairy. The pubescence, 

 although sparser, is that of A. viissoiiriensis, so also the pod. It may lie a hybrid 

 between the two. which were found growing together (No. 627). 



Astragalus frigidus americanus (Hook.) Wats. Ind. 193 (1878); Phaca frigida 

 anuricaiHi Hook. Fl. Bor. Amer. i, 140 (1830). 



The flowers in my specimens are light ochrolcucous. Low ground in shade: Roch- 

 ford, altitude 1,600 m., July 12 (No. 628). 



Astragalus bisulcatus (Hook.) Gray, Pac. R. Rep. xii. bk. ii. pt. ii, 42 (1860) ; Phaca 

 hisukata Hook. Fl. Bor. Amer. i, 145 (1834). 



Plains among the foothills: Hermosa, altitude 1.000 m.. June 23 (No. 629). 



Astragalus flexuosus Dougl. ; Hook. Fl. Bor. Amer. i, 141 (1834), as synonym; 

 Phaca Jiexnosa Hook. loc. cit. 



The specimens are large and decumbent. Rochfprd, altitude 1,700 m., .July 12 

 (No. 630). 



Astragalus convallarius Gfeene, Erythea, i, 207 (1893). 



Only a few slender specimens were collected. The flowers are unusually small, 

 ochroleucous. Bull Springs, altitude 2.000 m., July 29 (No. 631). 



Astragalus tenellus Pursh, Fl. ii, 473 (1814). 



Xr'.ir Bull Springs, altitude 1,900 m., Jtily 27 (No. 632). 



Astragalus spatulatus Sheld, Geol. &, Nat. Hist. Surv. Minn. Bull. 9, pt. i, 22 (1894). 



Prol)ably .1. simplivifolius Gray, of Newton & Jenney's Report. ' 



Hot Springs, altitude 1,100 m., June 13; Bull Springs, altitude 1,900 ui., .July 27 

 (No. 633). Near the latter place some specimens were found with 3 and 2-foliato 

 leaves, showing that the common form has developed by reduction. July 28 (No. 

 631). 



Astragalus gilviflorus Sheldon. Geol. & Nat. Hist. Surv. Minn. Bull. 9, pt. i, 21 

 (1894). 



Foothills: Hot Springs, altitude 1,100 m., June 18 (No. 635). 



Spiesia viscida (Nutt.) Kuntze, Rev. Gen. PI. i, 207 (1891) ; Orijtrojyis riscida Nutt. ; 

 Torr. & dr. Fl. i, .341 (1838) ; Oxytropis monticola Gray, Proc. Amer. Acad, xv, 6 (1885). 



My specimens dift'er from all except one of tliose named (). riscida in the National 

 Herbarium in being more silky and having larger, yellowish flowers in an elongated 

 spike. The one excepted was collected by Win. C. Cusick in Oregon, which is nearer 

 to the type locality of Nuttall's plant than any of the localities rejiresented by the 

 other specimens. NuttaU's type locality was, "near tlie sources of the Oregon" 



» Geol. Surv. Black Hills, 533 (1880). 



