86 BOTANY. 



Psoralea. Perennial herbs, with 3-foliolate leaves aud axillary spikes. 

 Stamens mouadelphous 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 piuuate leaves and terminal spikes. Stamens 

 5, mouadelphous, 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. 

 Stameus 10, monadelphous, the petals jointed to the tube. Pod 1-2 seeded. 

 1 1 1 Leaves pinnately 3-manyfoliolate (digitately 2-4-foliolate in Zomia) ; leaflets 

 entire: pod transversely 2-several-jointed, the joints indehiscentand 1-seeded. 

 Herbs. 



Hedysartjm. 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. Bacemes 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 Gologania and Rhynchosia). 

 t Leaves abruptly pinnate, terminated by a tendril : seed-stalks broad at the 

 hilum. 

 Vicia. Stamen-tube oblique at the mouth. Style filiform, hairy around and 



below the apex. 

 Lathyrtjs. 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. 



Cologania. Calyx tubular. Style naked. Bracts persistent. 



Galactia. Calyx 4-cleft. Keel nearly straight. Style naked. Bracts minute 



or caducous. 

 Phaseoltjs. Calyx short. Keel strongly incurved and standard reflexed. 

 Style bearded. Bracts minute or caducous. 

 \ f Flowers yellow, axillary : seeds 1 or 2. 



Ehynchosia. Flowers small. Style naked. Leaves often resinous-dotted. 



Suborder II. CiESALPINEiE. 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. Kadicle not inflexed. 



• Leaves bipiuuate ; leaflets small : anthers 10, versatile, dehiscing longitudinally ; 



calyx slightly imbricate or valvate. 



