440 
BOTANY. 
tube ; pod Tillous, 9-10" long, ovate-lunate, strongly iucurved, sulcato on the back with a slight iutro- 
flexion of the suture. — Colorado, (Nuttall.) 
* * Perennial, short-stemmed or scarcely caulescent, usually prostrate or matted ; flowers rather 
large, shortly pedicelled, mostly violet ; leaflets oblong, elliptic or obovate. Pod thick-coriaceous, 
obcompressed or obcompressed-triangular, transversely rugulose. 
56. A. MissouRiEXSis, Nutt. Subcaulescent, hoary-silky with a short very closely appressed pubes- 
cence ; peduncles scapelike, capitately few-flowered or spicately 8-14-flowered ; calyx-teeth about half- 
shorter than the cylindric tube; corolla bright violet, (or rarely white;) pod about 1' long, nearly 
straight, blackish, elliptic. — From the Saskatchewan to Nebraska and New Mexico. 
57. A. SiiORTiANtJS, Nutt. Usually subacaulescent, silky-canescent with a very closely appressed 
pubescence; leaflets obovate or ovate, 7-10" long; peduncles scapeliko, few-many-flowcred, usually 
shorter than the leaves ; calyx i' long, cylindric, teeth half-shorter than the tube ; corolla violet or blue ; 
immature pod li-2' long, ovate-lanceolate, pointed and strongly arcuate, thick, puberulent.— N. Colorado. 
Var. (?) MINOR has smaller leaflets and the pod oblong- or lanceolate-linear, the dorsal suture deeply in- 
truded, carinate veutrally. — W. Texas and New Mexico to Nebraska and Colorado. 
58. A. Parryi, Gray. Stems short, prostrate ; villous with loose spreading hairs ; iieduucles rather 
short ; flowers G-10, loosely subcapitate, 6-8" long, whitish or yellowish, the keel tinged with purple ; 
calyx-teeth half-shorter than the cylindric tube ; pod pubescent, oblong-lanceolate, 1' long or more, 
arched or at length circinate, strongly obcompressed and rugulose, both sutures sulcately impressed, con- 
tiguous. — Colorado to N. W. Texas. 
.59. A. lODANTiius, S. Watson. Subglabrous ; s^jikes dense. See page 70. 
GO. A. BECKwaTiiii, T. & G. Subglabrous ; raceme loose ; pod short-stipitate. See page 71. 
Gl. A. GLAREOSUS, Dougl. Depressed, villous-silky with white incumbent hairs; flowers 3--6, nar- 
row, 9-12" long, on peduncles not exceeding the leaves, bright violet ; calyx-teeth one-third as long as 
■ the long-cylindric tube ; pod (immature) oblong-ovate, attenuate above, incurved, silky-pubescent, " be- 
coming subglabrous." — S. Idaho ; Wyoming. 
Series II. PHACA, L. Pod 1-celled, neither suture being inflexed or the ventral more intruded than 
the dorsal. § § 17-27. 
(A.) Leaves pinnate with many or rarely with few or abortive leaflets, or simple. 
^ 17. ERIOCARPI. Pod very woolly, short, turgid, coriaceous, more or less incurved, acuminate or 
pointed, sessile. Very soft-woolly; stems short, prostrate, from a stout perennial root; flowers 
usually 1' long, loosely subcapitate ; calyx long-cylindric. 
G2. A. iM r.r.xcs, Dougl. Cinereous-hoary with loose subvillous wool; stems 6-12' long, difiuse- 
procumbent ; leaflets oblong ; flowers 1' long, bright-purple, the keel little exceeding the loose slender 
setaceous calyx-teeth ; pod ovate-oblong, very Avoolly when young, becoming somewhat naked, strongly 
incurved, obcompressed, both sutures impressed, the ventral one more so. — Idaho ; Washington Territory. 
63. A. KRiocARPUS, S. Watson. Pubescence rather hirsute-silky. See page 72. 
64. A. PuRSiiii, Dougl. Flowers ochroleucous ; leaflets lanceolate or oblong. See page 72. 
65. A. Utaiiense, T. & G. Flowers dark-purple ; leaflets subrounded. See page 72. 
$ 18. OOCARPI. Pod chartaceous-coriaceous, ovate, inflated, sessile, glabrous, ventral suture iu- 
truded, the dorsal obsoletely so. Glabrato, perennial, erect, leafy ; stipules free, distinct ; leaflets 
oblong and oval, sometimes retuse ; flowers many in a spikelike raceme, white or whitish, i' long ; 
calyx short ; pod erect, not over 1' long. 
66. A. CooPERl, Gray. Leaflets oblong; calyx dark-jiubescent, teeth subulate ; jiod ovate-globose, 
sub-obcompressed, slightly sulcate on Itoth sidos, cavity wcbby. — W. New York to Wisconsin. 
67. A. OOCARPUS, Gray. 4-6^' high ; leaflets oval, rather small, thickish ; flowers spreading, in a 
rather loose raceme ; calyx whitish-pubcrulent, teeth very short ; pod oblong-ovate, acute, slightly sul- 
cate only veutrally and that suture intiotlexed, gLnbrous within. — S. (California. 
19. INFLATI. Pod membranous, inllatcd, globose, egg-shaped or semi-ovate, usually large, finely 
reticulated, glabrous or glabrate, neither suture iutiexcd or rarely the ventral only and slightly. 
* Annual ; pod sessile, not mottled ; flowers snuiU, ochroleucous or puriflish. Low ; leaflets linear 
or linear-oblong, gray Avith strigulose hairs. 
68. A. TRiFi^ORUs, Gray. Very much branched from the base ; flowers 3-15 ; pod oval, obtuse or 
ut utish. 7-12 loug. — Arizoua, ilexico. 
69. A. Geyeri, Gray. Flowers few, yellowish- white ; pod ovate-lunate. See page 72. 
* * Root perennial, (annual ? in A. pictus ;) pod mottled, short-stipitate, the stipe equaling the 
calyx ; flowers few, rather small, light-colored, keel with the inflexed apex somewhat produced. 
