442 
BOTANY. 
long or snbliuear, obtuse or retxise ; calyx more or less piiboseoiit. tlie iecth siil.ulate, balf-sliorter tliaii 
the short-campanulate tube ; corolla ocbroleucous ; ovary cancscent; pod {glabrous, 1-1^' long, sultatton- 
uate at base, tbe stipe 5-6" long.— Coast of S. California. 
82. A. LEUCOPHYLLUS, T. & G. Silky-lioary ; leailets 10-18 pairs, broad-linear or lanceolate, obtuse 
or acutisb; calyx silky, tlio tt etli narrowly subulate, balf-sborter than tbe oblong tube; corolla appa- 
rently yellowisb ; ovary and stipe silky-canescent, the pod at length glabrous, U' long, oval-gibbous, 
very obtuse at each end, the filiform stipe 1' long. 
83. A. TRiciiOPODTJS, Gray. Ashy-pubemlent, glabrate, stems 1^-3° long ; leaflets 11-19 pairs, linear- 
oblong, obtuse ; calyx dark-pubescent, the campauulate tube much exceeding the subulate teeth ; corolla 
ocbroleucous, 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, lf-2' long, glabrate, acutely acu- 
minate and long-attennate at base, stipe 3-4" long, recurved, pubescent.— California. 
85. A. FRiGiDus, Gray. Subglabrous, 1-2° high ; stipules ovate-oblong, membranous ; 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 Eocky Mts. of Colorado to Alaska and the Arctic regions. 
^ 20. LONCHOCAEPI. Pod membranous, lanceolate-cylindric, straight, exsertly stipitate, glabrous, 
neither suture intruded ; flowers rather large ; calyx cylindric ; leaflets few or almost none. 
86. A. LONCHOCARPus, 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- 
tened-filiform rachis ; 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 li' 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, obtnse ; racemes slender, 5-12-flowored ; 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. i.EPTALEUS, Gray. Nearly glalirous, stems slender, ascending, a span high ; stipules long- 
subulatc, subconnate at base ; leaflets 7-11 pairs, lance-linear or oblong, often acute ; peduncles 2-4- 
flowcrcil, slioitcr than tlie leaves; calyx with short black hairs, tlie campauulate tube slightly exceeding 
the siibiilato teeth, about equaling tlie pedicel and .subulate bract ; corolla 4" long, white, the emarginate 
banner tliird longer tliaii th,- violet-tipped keel ; pod ovate or oval, 4" long, pubernlent, chartaceous, 
snb-ol)coiiipre.s.sed {!). — Colorado. 
89. A. TiiURiiKJU, Gray. Cinereous with minute pubescence ; stems suberect, 6-10' high ; stipules 
distinct, small, scarious ; leaflets 6-7 pairs, linear-obbmg, refuse, rather thick ; racemes short-peduncled 
loosely 10--.>()-liowere,l ; lU.weis wbitisli, 3" b)ng, veiy short, pedicelled ; calyx-teeth subulate, slightly 
shorter than the tube ; ])od coriaceous-nieniliiaiuius, <;lob()se, 3" lon^-, glabrous. Arizona. " 
90. A. ,Tr..iT-xx:s, S. Watson. Pod gil)bous< dorsally. See page 73, and Plate XIII. 
^ 22. ni.SULCATI. Pod coriaceous, shortly exsert^stiiiitate, straight, narrowly oblong, semi-cyliu- 
ilrie, the ileeply concave ventral siulaee divided liy tb(> salient obtuse suture. Perennial. 
91. A. BisT-LCATrs. Gray, .'^tiigiilnse-jiiil.erul. ii! ; st, ni erect, over 1° high, stout; stipnies distinct 
free; leaflets oblong, ofh ii narrow, the low. st near the stem ; flowers violet, in dense spikelike racemes' 
middle-size.l, pendent or spreading, tln^ keel lu :uly straight ; ealyx-teeth setaceous, scarcely shorter than 
the campauulate tube ; pod V long.— From Nebraska to tbe Saskatchewan ami Rockv Mt.s. 
0 23. PECTINATI. Pod tbi< k-eartibigino,is with a subtle.shy epicarp, subovate or oblong, turgid, 
sessile, neitlier suture intruded l>ut both thick and prominent. Perennial, 1° high, stem and leaves 
rather rigid ; leaflets nearly lilin.. ,.. ,.nt jointed to the rachis, persistent ; lowe^r stipules connate ; 
flowers nearly 1' long, keel »> j,ht. 
