493 
In woods: Custer, altitude 1,700 m., June 3; Little Elk Canyon, altitude 1,200 m., 
June 28; Lead City, altitude 1,600 in., July 6; Rochford, altitude 1,700 m., July 11 
(No. 624). 
Astragalus lotiflorus Hook. Il. Bor. Amer, 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 tlowers are sessile, the plant thus 
approaching the forma brachypus 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, altitude 1,100 m., June 16 (No. 625), 
Astragalus missouriensis 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, differ considera- 
bly from the common form, The stem is not cespitose, but ascending, less hairy ; 
leaflets larger, obovate; flowers racemose or subcapitate on along peduncle. In gen- 
eral appearance, color of the flowers, etc., they resemble 4. adsurgens, but the heads 
are more lax, the leaflets broader, and the plant more hairy. The pubescence, 
although sparser, is that of 4. missouriensis, so also the pod. It may be a hybrid 
between the two, which were found growing together (No, 627), . 
Astragalus frigidus americanus (Hook.) Wats. Ind. 198 (1878); Phaca frigida 
americana Hook. Fl. Bor, Amer, i, 140 (1830). 
The flowers in my specimens are light ochroleucous, 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. 11, 42 (1860); Phaca 
bisulcata Hook. F1. 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 flecuosa Hook. loc. cit. 
The specimens are large and decumbent. Rochford, altitude 1,700 m., July 12 
(No, 630), 
Astragalus convallarius Greene, 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, I'l. ii, 475 (1814). 
Near Bull Springs, altitude 1,900 m., July 27 (No. 682). 
Astragalus spatulatus Sheld. Geol. & Nat. Hist. Surv. Minn. Bull. 9, pt. i, 22 (1894), 
Probably 4. simplicifolius Gray, of Newton & Jenney’s Report. ! 
Hot Springs, altitude 1,100 m., June 13; Bull Springs, altitude 1,900 m., July 27 
(No. 633). Near the latter place some specimens were found with 3 and 2-foliate 
leaves, showing that the common form has developed by reduction. July 28 (No. 
634). 
Astragalus gilviflorus Sheldon. Geol. & Nat. Hist. Surv. Minn. Bull. 3, pt. i, 21 
(1894). 
Foothills: Hot Springs, altitude 1,100 m., June 18 (No, 635). 
Spiesia viscida (Nutt.) Kuntze, Rev. Gen, Pl. i, 207 (1891); Oxytropis viscida Nutt. ; 
Torr. & Gr. Fl. i, 841 (1838); Oxytropis monticola Gray, Proc. Amer. Acad. xv, 6 (1885), 
My specimens differ from all except one of those named 0. riscida in the National 
Herbarium in being more silky and having larger, yellowish flowers in an elongated 
spike. The one excepted was collected by Wim. C, Cusick in Oregon, which is nearer 
to the type locality of Nuttall’s plant than any of the localities represented by the 
other specimens. Nuttall’s type locality was, ‘near the sources of the Oregon” 
1 Geol. Surv. Black Hills, 533 (1880). 
