86 BOTANY. 
PSORALEA. Perennial herbs, with 3-foliolate leaves and axillary spikes. 
Stamens monadelphous or somewhat diadelphous. Pod 1-seeded. 
AMORPHA. Shrubs, with pinnate leaves and terminal racemes. Wings and 
keel wanting. Stamens united only at base. Pod 1-2-seeded. 
PETALOSTEMON. Herbs, with pinnate leaves and terminal spikes. Stamens 
5, monadelphous, bearing 4 of the petals on the tube. Pod 1-seeded. 
PARRYELLA. Shrubby, with pinnate leaves and terminal spikes. Stamens 
10, distinct. Petals none. Pod 1-seeded. 
DALEA. Shrubs or herbs, with pinnate leaves and terminal spikes or heads. 
Stamens 10, monadelphous, the petals jointed to the tube. Pod 1-2-seeded. 
ttt _— pinnately 3-many-foliolate (digitately 2-4-foliolate in Zornia); leaflets 
entire: pod transversely 2-several-jointed, the joints indehiscent and 1-seeded. 
Herbs, 
HEDYsARUM. Leaflets several, stipellate; stipules scarious. Stamens dia- 
delphous. Perennial, with axillary racemes. 
ZORNIA. Leaflets 2; stipules herbaceous. Stamens monadelphous. Flowers 
Spicate, each solitary and sessile between a pair of conspicuous bracts. 
Annual. 
DESMODIUM. Leaflets 3; stipules dry and striate. Stamens usually mona- 
delphous. Racemes simple or panicled. 
*** Anthers uniform. Herbs, climbing by tendrils or twining, sometimes prostrate: 
stamens diadelphous: pod flat, 2-valved: racemes axillary (or flowers axillary 
in Cologania and Rhynchosia). 
t Leaves abruptly pinnate, terminated by a tendril: seed-stalks broad at the 
hi 
Victa. Stamen-tube oblique at the mouth. Style filiform, bairy around and 
below the apex. 
LATHYRUS. Stamen-tube nearly truncate. Style dorsally flattened, usually 
twisted half around, hairy on the inner side. 
tt Twining or prostrate herbs, with 3-foliolate leaves. 
¢ Flowers not yellow: seeds several. 
CoLoGanta. Calyx tubular. Style naked. Bracts persistent. 
GauacTia. Calyx 4-cleft. Keel nearly straight. Style naked. Bracts minute 
PHASEOLUS. Calyx short. Keel strongly incurved and standard reflexed. 
Style bearded. Bracts minute or caducous. 
tt Flowers yellow, axillary : seeds 1 or 2. 
RHYNCHOSIA. Flowers small. Style naked. Leaves often resinous-dotted. 
SUBORDER II. CHSALPINE®. Flowers more or less irregular, perfect. Perigy- 
nous disk lining the base of the short calyx-tube. Petals 5, imbricated, the 
upper one included. Stamens 10 or fewer, distinct. Seeds sometimes 
albuminous. Radicle not inflexed. 
* Leaves bipinuate ; leaflets small: anthers 10, versatile, Kine longitudinally : 
calyx slightly imbricate or valvate. 
