442 BOTAITY. 



long or sublinear, obtuse or retuse ; calyx more or less pubescent, the teeth subulate, half-shorter than 

 the short-campanulate tube ; corolla ochrolenoous ; ovary canescent; pod glabrous, 1-1|' long, subatten- 

 uate at base, the stipe 5-6" long. — Coast of S. California. 



82. A. LBTJCOPHYLLUS, T. & G. Silky-hoary ; leaflets 10-18 pairs, broad-linear or lanceolate, obtuse 

 or acutish ; calyx silky, the teeth narrowly subulate, half-shorter than the oblong tube ; corolla appa- 

 rently yellowish ; ovary and stipe silky-canescent, the pod at length glabrous, li' long, oval-gibbous, 

 very obtuse at each end, the filiform stipe 1' long. 



83. A. TEICHOPODTJS, Gray. Ashy-puberulent, glabrate, stems 11-3° long; leaflets lt-19 pairs, linear- 

 oblong, obtuse; calyx dark-pubescent, the campanulate tube much exceeding the subulate teeth ; corolla 

 ochroleucous, 4^-6" long ; ovary glabrous ; pod 8-9" long, ellipsoid, very obtuse at each end, but little 

 gibbous ; stipe 6" long, very slender, minutely pubescent. 



(3''.) Stipes less exserted ; pod pointed at each end. 



84. A. OXYPHYSUS, Gray. Very softly hoary- villous, stems 3° long ; stipules scarious ; leaflets 8-11 

 pairs, oblong, 1' long or less, from hoary becoming green ; peduncles much exceeding the leaves; raceme 

 elongated ; bracts subulate, small ; calyx silky, the subulate teeth half-shorter than the cylindric tube ; 

 flowers narrow, 9" long, white or greenish-white ; pod obovate-clavate, 1^-2' long, glabrate, acutely acu- 

 minate and long-attenuate at base, stipe 3-4" long, recurved, pubescent. — California. 



85. A. FEIGIDUS, Gray. Snbglabrous, 1-2° high ; stipules ovate-oblong, membranoiis ; leaflets 7-9 

 pairs, ovate-oblong or elliptic-oblong, green ; peduncles equaling the leaves ; calyx-teeth short ; corolla 

 white; pod oblong, acute at each end, black-hairy or glabrous, the stipe equaling or exceeding the 

 calyx. — From the Eooky Mts. of Colorado to Alaska and the Arctic regions. 



§ 20. LONCHOCAEPI. Pod membranous, lanceolate-cylindrio, straight, exsertlystipitate, glabrous, 

 neither suture intruded ; flowers rather large ; calyx cylindric ; leaflets few or almost none. 



86. A. LONCHOCAEPUS, T. & G. Ashy-puberulent, glabrate, perennial : stem fistulous, branched, 2° 

 long; stipules distinct, small ; leaflets 1-5, filiform-linear, remote, the leaf sometimes reduced to the flat- 

 teued-filiform raohis ; racemes loosely many-flowered ; bracts half-shorter than the pedicels ; flowers 

 white, pendent ; calyx-teeth broad-subulate, one-fourth the length of the tube ; pod 1^' long, very 

 sharply acuminate at each end. — New Mexico. 



§ 21. MICROCYSTEI. Pod membranous or chartaceous, small, globose or ovate, inflated, sessile, 

 neither suture intruded. Perennial, diffuse or procumbent, mostly small and slender ; flowers 

 small and usually few. 



87. A. MICROCYSTIS, Gray. Ashy-pubescent, procumbent, from a woody root ; stems slender, much- 

 branched ; stipules scarious, connate or the uppermost nearly distinct ; leaflets 4-6 pairs, oblong or oblong- 

 lanceolate, obtuse ; racemes slender, 5-12-flowered ; calyx hairy, the teeth setaceous-subulate, equaling 

 the short-campanulate tube ; corolla violet or whitish, the deeply emarginate banner slightly exceeding 

 the wings, twice longer than the incurved keel ; pod globose-ovate, 3" long, thin-membranous, gray- 

 pubescent. — Washington Territory. 



88. A. LEPTALB0S, Gray. Nearly glabrous, stems slender, ascending, a span high ; stipules long- 

 subulate, subcbunate at base ; leaflets 7-11 pairs, lance-linear or oblong, often acute ; peduncles 2-4- 

 flowered, shorter than the leaves ; calyx with short black hairs, the campanulate tube slightly exceeding 

 the subulate teeth, about equaling the pedicel aud subulate bract ; corolla 4" long, white, the emarginate 

 banner a third longer than tha violet-tipped keel ; pod ovate or oval, 4" long, puberulent, chartaceous, 

 sub-obcompressed (?). — Colorado. 



89. A. Ti-itTEBERi, Gray. Cinereous with minute pubescence ; stems suberect, 6-10' high ; stipules 

 distinct, small, scarious ; leaflets 6-7 pairs, linear-oblong, retuse, rather thick ; racemes short-peduncled, 

 loosely 10-20-flowered ; flowers whitish, 3" long, very short, pedicelled ; calyx-teeth subulate, slightly 

 shorter than the tube ; pod coriaceous-membranous, globose, 3" long, glabrous. — Arizona. 



90. A. JEJUNUS, S. Watson. Pod gibbous dorsally. See page 73, and Plate XIII. 



§ 22. BISULCATI. Pod coriaceous, shortly oxsert-stipitate, straight, narrowly oblong, semi-oylin- 

 drio, the deeply concave ventral surface divided by the salieut obtuse suture. Perennial. 



91. A. BIS0LCATUS, Gray. Strigulose-puberulent ; stem erect, over 1° high, stout ; stipules distinct, 

 free ; leaflets oblong, often narrow, the lowest near the stem ; flowers violet, in dense spikelike racemes, 

 middle-sized, pendent or spreading, the keel nearly straight ; calyx-teeth setaceous, scarcely shorter than 

 the campanulate tube ; pod i' long, — From Nebraska to the Saskatchewan aud Eocky Mts. 



§ 23. PECTINATI. Pod thick-cartilaginous with a subfleshy epicarp, subovate or oblong, turgid, 

 sessile, neither suture intruded but both thick and prominent. Perennial, 1° high, stem and leaves 

 rather rigid ; leaflets nearly filiform, not jointed to the rachis, persistent ; lower stipules connate ; 

 flowers nearly 1' long, keel nearly straight. 



