CATALOGUE. 73 



Mountains, and on sand dunes at Cooper's Ferry, near Humboldt Lake, 

 Nevada; May. (276.) 



Astragalus Hookeeianus, Gray ; I. c, 216. Perennial, silky-pubescent ; 

 stems low, (2-4',) ascending, flexuous ; stipules lanceolate, lower ones mem- 

 branous and sheathing; leaflets 6-9 pairs, 2-3" long, oblong or linear- 

 oblong, or orbicular; spikes short, few-flowered; corolla ochroleucous, 

 4-5" long ; calyx-tube campanulate, the teeth short ; legume 1-2' long, 

 membranous, inflated, oblong-obovate, rounded at the apex, attenuate at base 

 into a short stipe, mottled, glabrous, 1-celled. — Collected only by Douglas in 

 the "interior of Oregon," and by Anderson (273) in the "West Humboldt 

 Mountains, probably on Star Peak, where it grows in the crevices of hme- 

 stone rocks at an elevation of 10,000 feet; in flower and fruit, September. 

 A dwarf species of very distinct habit, and easily distinguished by its large 

 obtuse legume. (277.) 



Astragalus oophoeus. Perennial, glabrous throughout; stems 1-2° 

 long, numerous, subdecumbent ; stipules ovate-acuminate, nearly free ; leaflets 

 4-6 pairs, 6 9" long, ovate-oblong, obtuse; racemes short, loosely few-(6-10-) 

 flowered ; flowers J' long, ochroleucous or tinged with violet, spreading ; 

 calyx-teeth setaceous, equaling the campanulate tube ; legume 2' long, mem- 

 branous, inflated, ovate, (the sutures equally arched,) acuminate, upon a stipe 

 equaling the calyx, reflexed, mottled, glabrous, 1-celled. — Near A. curtipes, 

 Cray. Reese River Pass of the Shoshone Mountains, Nevada ; 5,500 feet 

 altitude; July. (278.) 



Astragalus jejunus. Perennial, dwarf, minutely hoary-pubescent; 

 stems short (1-2' long) and crowded, from a many-branching caudex, covered 

 with numerous imbricated stipules, which are membranous, sheathing, trun- 

 cate and ciliate ; leaflets 4-7 pairs, linear, 1-2" long ; peduncles shorter than 

 the leaves, 2-3-flowered ; corolla ochroleucous or tinged with violet, 2" long ; 

 calyx-teeth a little shorter than the campantilate tube ; legume 4" long, mem- 

 branous, inflated, globose, obtuse, sessile, glabrous, wholly 1-celled. — An in- 

 significant species with a starved desert habit, but remarkable for its singu- 

 larly stipuled stems and obtuse legumes ; growing on the foot-hills of Bear 

 River Valley, near Evanston, Utah. Plate XIII. Fig. 1. A stem; natural 

 size. Figs. 2-5. Parts of the flower ; enlarged four diameters. Fig. 6. 

 Mature legume, opened ; enlarged two diameters. (279.) 



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