CATALOGUE. 
69 
ovuled, sessile, reticulated. — Arkansas and Texas to Arizona and Sonora. 
Var. TRICHOCARPUS, T. & Of. With hispid calyx and slightly hairy legumes ; 
stems 3' high. Found on Stansbury Island, Salt Lake ; June. (263.) 
Astragalus areectus, Gray. Proc. A?ner. Acad. 8. 289. Perennial, 
somewhat cinereous-pubescent or nearly glabrous ; stems 1-2° high, erect, 
sulcate, simple or branched ; stipules distinct, scarious; leaflets 9-12 pairs, 6-8" 
long, ovate or narrowly oblong, obtuse or retuse ; racemes on long peduncles, 
loosely rather few-flowered ; flowers ochroleucous, 1" long, twice exceed- 
ing the tubular-campanulate nigrescent calyx ; calyx-teeth rather short and 
slender, but variable; pod erect upon a spreading or somewhat deflexed 
pedicel, coriaceous, sub glabrous, oblong (|-1' long,) nearly straight, cuspi- 
date, abruptly narrowed at base into a stipe as long as the calyx, with a 
deep dorsal sulcus and somewhat carinate ventrally, 2-celIed, many-seeded. — 
This is 378 {A. leucophyllus, ?) of Geyer's collection, from Oregon, and 
is nearest A. Drummondii. Foot-hills about Summit Springs, near Battle 
Mountain, Nevada ; 5,500 feet altitude ; June. (264.) 
Astragalus atratus. Perennial, somewhat canescent with a minute 
appressed pubescence; stems 6'-l° high, numerous, slender, ascending; 
stipules small, triangular, somewhat adnate to the petiole ; leaflets 4-7 pairs, 
linear or oblong, 2-5" long, obtuse or acute ; peduncles exceeding the 
leaves; racemes loose or capitate, few- (5-1 0-) flowered ; calyx-tube campan- 
ulate, nigrescent, twice longer than the acute teeth ; corolla long, ochro- 
leucous or somewhat tinged with violet ; banner emarginate and with the 
2-lobed wings much exceeding the strongly arched keel ; legume 10" long, 
short-stipitate, chartaceous, minutely pubescent or nearly glabrous, linear, 
straight, terete, with a narrow dorsal sulcus and nearly 2-celled, many- 
(15-20-) ovuled, more or less pendent.— With the habit of A. orohoides and 
alpinus. Found on the Pah-Ute, HavaUah, and Toyabe ranges, Nevada; 
6-7,000 feet altitude ; June, July. Plate XI. Fig. 1. Plant ; natural size. 
Fig. 2. Petals. Fig. 3. Stamens and ovary ; both enlarged two diameters. 
Fig. 4. Mature legume. Fig. 5. Cross-section of same. (265.) 
Astragalus obscurus. Very closely resembhng the last, but diff-ering 
in the erect sessile 10-15-ovuled legume, and in the flowers, which have the 
keel less strongly arched, with the apex ascending, equaling the entire wings, 
but shorter than the orbicular banner. Found on rocky foot-hiUs near 
Truckee Pass, Nevada ; 5,500 feet altitude ; May. (266.) 
