74 
BOTANY. 
Astragalus nudus. Perennial, somewhat hoary with a minute pubes- 
cence ; stems numerous, ascending, branched, flexuous ; stipules ovate-acu- 
minate, the lower ones adnate to the petioles; leaflets i-V long, 1-2 pairs, 
linear, distant upon a long (4-6') angular racliis ; peduncles equaling the 
leaves; flowers (6-8) distant; corolla violet-purple, 9-12'' long, twice 
longer than the cyHndrical calyx ; calyx-teeth lanceolate, not half the length 
of the tube ; legume S-1' long, sessile, erect, thick, cartilaginous, glabrous, 
oblong-ovate, inflated, not sulcate, the sutures thick and prominent and not 
intruded, 1-celled, many-seeded. — Very near A. pectinatus, but distinguished 
by its erect and somewhat larger legumes, its few loosely-raccmed blue 
flowers, and sparse short leaflets. West Humboldt Mountains, Nevada; 
5,000 feet altitude; May, June. (280.) 
AsTEAGALUs Cham^eleuce, Gray ; I. c, 222. Perennial, silvery-canes- 
cent with a dense silky pubescence ; stems numerous, short, (1-6',) prostrate, 
or nearly acaulescent ; stipules ovate, membranous, free ; leaflets 2-4" long, 
2- 6 pairs, oblong, obovate or oval; peduncles shorter than the leaves, slender, 
3- 8-flowered ; calyx-teeth subulate, much shorter than the cylindrical tube ; 
corolla light violet, I' long ; legume J- 1' long, thick-coriaceous, sessile, ovate- 
oblong, acuminate, somewhat arcuate, terete or somewhat obcompressed 
and frequently sulcate ventrally, rugosely reticulated and subpubescent, 
1-celled, many-seeded. — From Arizona and New Mexico to Southern Idaho, 
(Burke.) Found in Ruby Valley, Nevada, and in the Wahsatch Mountains 
and Bear River Valley, Utah; 6-7,000 feet altitude; June, July. The pres- 
ent specimens have more numerous and narrower leaflets than usual. (281.) 
Astragalus speieo carpus. Gray ; Ic, 225. Perennial, somewhat cine- 
reous with a minute pubescence ; stems 1-2° long, numerous, decumbent, 
simple or branched; stipules small, ovate-lanceolate, nearly free; leaflets 4-9 
pairs, 3-6" long, obovate or oblong, retuse ; racemes loose, secund, rather 
few-(10-20-)flowered ; flowers 10" long, ochroleucous, keel spurred ; the 
cylindrical calyx-tube several times longer than the rather short teeth ; legume 
1-1 long, coriaceous, exsertly stipitate, flattened, glabrous, linear-lanceo- 
late, spirally coiled, perfectly 1-celled, many-seeded. — The legumes in these 
specimens are much thinner and less rugose than in Lyall's, the sutures not 
thickened nor showing any tendency to separation. On the Upper Colum- 
bia, (Lyall.) On the Trinity, Pah-Ute and Toyabe Mountains, Nevada; 
6;000 feet altitude ; May-July. (282.) 
