68 LEGUMINOS^E. (PULSE FAMILY.) 



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

 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. 



i- *- Stipules as before : pod sessile. Caulescent. 



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



stipules all more or less connate. 



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

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

 2 to b-flowered : 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 ockroleucous: pod ovate-oblong, 

 pubescent, 2 to 3 lines long. — Bot. King's Exp. 76, t. 13. Nevada, Idaho, and 

 Montana. 



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

 stipules tipped 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. 



*+ -w Calyx-teeth sliort or about equalling the tube. Slender, rather rigid, branched: 

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

 long-peduncled racemes, ockroleucous or purplish. 



56. A. campestris, Gray. Minutely pubescent or glabrate: stipules mem- 

 branous, large ; leaflets 5 to 9 jxtirs : 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 decumbens, Gray. Cinereous- or silky-pubescent : stems diffuse 

 or ascending : petioles sometimes somewhat flattened, mostly with 7 to 13 leaflets: 

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

 straight or falcate, hoary pubendent. — Loc. cit. Mountains of Colorado 

 and northward. 



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

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

 nuked, 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. dirersifolius, Gray. Gravelly plains, 

 from Colorado northward through Wyoming and Montana, and westward 

 into Utah and Nevada. 



h- i- n- Stipules scarious, connate : pod short, sessile. Acaulescent, cespitose, silk i/- 

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

 leaves, many-flowered : corolla purple or rose-color. 



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

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

 to the mountains. 



