LEGUMINOS/E. (PULSK FAMILY.) 67 



§ IS. Pud thick-cartilafjinons with a sufijieshi/ epirar]), subovate or oblonrf, tnnjid, 

 sessile, neither suture intruded, but Itoth thick and ftrominmt. — I'rrennial, a /utM 

 hiylL, stem and leaves rather riyid : leajlets ntarlif Jili/urm, nut jointed to the 

 rachis, jirrsisfi nt. 



46. A. pectinatUS, Doiij^l. A.shy-jiulifruk'nt.^lalirate: l»raurheM hlriate, 

 angled : flowers white, the banner elongated : pod pendulous, glaliruuK, ciufpi- 

 date, the dorsal suture very thick. — From Colonulo to Ncl>ni.'*ka and the 

 Saskatchewan. 



47. A. Grayi, Parry. Distinguished from the last by the tnuadrr Ituflrta, 

 quite strongly veined, and hy the somewhat thinner asrendimf fuxl : fluwrrs 

 lifjht i/ellow. — Watson in Am. Nat. viii. 212. W. Wyoming {/'arrif). 



§ 19. Pod coriaceous, ovate or ohlonij, rareli/ cijlindrical, turrjid, not sulcate and 

 neither suture intruded. — Ours are perennials and the pods are sessile or 

 scarcelfi stipitate. 



* Xeat'li/ acaulescent, silver i/silki/, larr/e flowered. 



48. A. Newberryi, Gray. Stems very short, crowded from a deep elon- 

 gated root: leaflets 3 to 7, either broad- or narrow-obovate, approximate: 

 peduncles few-flowered : corolla ochroleucous : pod villous, the broad point 

 laterally compressed, subincurved. — Troc. Am. Acad. xii. 55. .1. Chamnlur,, 

 Gray, in part. On the borders of Utah, Arizona, and S. W. Colora«lo. 



* * Glabrous or pubescent, stems ascending or erect : pod very shortly stipitate or 

 sessile: calyr gray- or dark-pubescent. 



49. A. Fendleri, Gray. Glabrous or apjjresscd puberulent, erect: leaflets 

 oblong or linear-oblong : racemes loosely purple flowend: pod straight, minntrly 

 puberulent, very shortly stipitate. — PI. Wright, ii. 44. Colorado and New 

 Mexico. 



50. A. Hallii, Gray. Subcinereous-pubescent, g\ixhTiiiG,i\&ve\\(\'\ug: letfltts 

 narrow-oblong, subcuneate, retuse : flowers violet, in a dense head-like raceme : 

 pod straight, glabrous, with stipe a line long. — Proc. Am. Acad. vi. 224 

 Colorado to New Mexico. 



51. A. flexuosus, Dougl. Ashy-puberulent, ascending : Imflrts oUong- 

 or cuneate-linrar, oI)tnse or retuse: racemes mostly elongated, loose : corolla 

 white or purplish : pod cylindric, puberulent, straight or subincurved. slii»«' 

 very short but evident. — From Colorado to Nel)r:tska and the Saskatchewan. 



52. A. Pattersoni, Gray. Robust, a foot or two high. appressrd-puUru- 

 lent, sometimes gl:il)rous: leaflets oblong, thickish : peduncles racemosely many- 

 flowered: corolla white, the keel sometimes purplish at the tip : /hhI glabrou:>, 

 abruj.tly contracted within the calyx, becoming sumr<rl,,ff v/Zfi,./,/.' — I,.m- rit. \ii 

 55. S. W. Colorado and Utah. 



§ 20. Pod vetch-shaped, flattened or less compreufi d, straight, mnrginrd hy t/ir 



nerve-like sutures, coriaceous or chartaceous, sometimes stipitate. — Perennials, 



with the leaves pinnate with many or few leaflets, or in some .ytecies simple. 



« Flowers in peduncled racemes or spikes: pod many (7 to 20)-ovuled. 



•*-■ Stipules connate, at least the lower ones : pod exsert-stipitate. Caulescent : 



leaves pinnate, with many leaflets. 



53. A. milltiflorus, Gray. Somewhat glabrous: stems slender: stip- 

 ules dark colored ; leaflets G to 10 pairs, linear «'i narrowly oblong: pedun- 



