68 LEGUMINOS^. (pulse FAMILY.) 



cles not exceeding the leaves, loosely few-flowered : flowers ochroleucous, 

 tinged with purple : pod oblong, reflexed. — Proc. Am. Acad. vi. 226. From 

 Colorado to the plains of Nebraska, northward to lat. 65°, and westward to 

 Utah, Nevada, and S. California. 



-t- •»- Stipules as before : pod sessile. Caulescent. 



** Calyx-teeth very slender, exceeding the tube. Low, from a woody caudex : the 



stipules all more or less connate. 



54. A. paueiflorus, Hook. Dwarf, cinereous-pubescent, matted-decum- 

 bent, with crowded leaves : leaflets 3 to 5 pairs, oblong or lanceolate : peduncles 

 2 to h-fiowered : corolla violet: pod linear-oblong, silky-puberulent, 4 to 5 lines 

 long. — From the head-waters of the Yellowstone northward in the mountains 

 of British America. 



55. A. tegetarius, Watson. Dwarf, cespitose, canescent with a silky 

 pubescence : stems 2 to 6 lines long, numerous, procumbent : leaflets 3 to 5 

 pairs, linear: peduncles 1 to 3-flowered : corolla ochroleucous : pod ovate-oblong, 

 pubescent, 2 to S lines long. — Bot. King's Exp. 76, t. 13. Nevada, Idaho, and 

 Montana. 



Var. implexus, W. M. Can by. Leaflets in 2 pairs, crowded on the stems: 

 stijjules ti])ped with a short straight point : flowers violet, the keel deep purple : 

 pods mostly smaller, 1 or 2 lines long. — Fl. Colorado, Appx. South Park, 

 Colorado. 



++ -t-f. Calyx-teeth short or about equalling the tube. Slender, leather rigid, branched: 

 upper stipules nearly distinct : leaflets linear to oblong, or none : flowers in loose 

 long-ped uncled racemes, ochroleucous or purplish. 



56. A. eampestris, Gray. Mi^iutely pubescent or glabratt: stipules mem- 

 branous, large; leaflets 5 to 9 pairs: flowers subcapitate or scattered, the keel 

 with a long and narrow inflexed tip : pod oblong-linear, puberulent. — Proc. 

 Am. Acad. vi. 229. Mountains of Colorado and northward through Montana. 



57. A deeumbens, Gray. Cinereous- or silky -pubescent : stems diffuse 

 or ascending : petioles sometimes someivhat flattened, mostly with 1 to \S leaflets: 

 racemes 5 to 10-flowered : keel with a short inflexed tip: pod broad-linear, 

 straiglit or falcate, hoary puberulent. — Loc. cit. Mountains of Colorado 

 and northward. 



58. A. junceus, Gray. Minutely pubescent or subglabrous : stems usually 

 solitary, erect: stipules small : petioles slender, sometiines 6 inches long, usually 

 naked, or with 1 to 5 pairs of linear leaflets : peduncles 3 to 7-flowered, flowers 

 distant: keel strongly incurved: pod oblong-linear, straight or subfalcate, 

 pubescent. — Loc. cit. 230. Includes A. dii-ersifolius, Gray. Gravelly plains, 

 from Colorado northward through Wyoming and Montana, and westward 

 into Utah and Nevada. 



•4- -t- -I- Stipules scarious, connate : pod short, sessile. Acaidescent, cespitose, silky- 

 canescent: leaves simple, lanceolate- or spatulate-Unear : scapes exceeding the 

 leaves, many-flou-ered : corolla purple or rose-color. 



59. A. CSespitOSUS, Gray. Racemes spike-like : pod oblong or broad- 

 lanceolate, scarcely curved. — Loc. cit. Plains of the Platte from W. Nebraska 

 to the mountains. 



