Leguminosa.'] LEGUMiNOSiE. 73 



Anthers versatile, opening lengthwise. Flowers racemose. 



Tree. Pods thick, not winged 26. Pongamia. 



Woody climbers. Pods thin, with a narrow wing . .25. Derris. 

 Stamens all free {Sophorece). 



Calyx loose, truncate. Leaves simple 27. Bowringia. 



Calyx 5 -toothed. Leaves pinnate. 



Fruit indehiscent, much contracted between the seeds . . ,28. Sophora. 

 Pod 2-valved 29. Ormosia. 



Suborder II. Csesalpiniese. — Corolla irregular or nearly regular, imbricate in the 

 bud, the upper petal inside. 



Leaves twice pinnate. 



Pod very prickly 30. Guilandina. 



Pod not prickly 31. C^salpinia. 



Leaves once pinnate. 



Petals conspicuous, yellow, spreading 32. Cassia, 



Petals very small, almost like the sepals 34. Gleditschia. 



Leaves 2-lobed or with 2 leaflets 33. Bauhinia. 



Suborder III, lYEixnosese. — Corolla regular. Petals small, valvate in the bad. 

 Leaves twice pinnate. 



Stamens 10 35. Leuc^na. 



Stamens indefinite. 



Stamens free, usually short 36. Acacia. 



Stamens monadelphous, usually long. 



Pod straight, thin 37. Albizzia. 



Pod curved or spiral, often thick and pulpy inside ... 38. Pithecolobium. 



SUBORDER I, PAFIIiIONACE^. 



Calyx 5 -toothed or -cleft, or 4-toothed by the union of the 2 upper ones, 

 rarely splitting irregularly. Corolla very irregular, papilionaceous, that is, of 

 5 petals, the upper one, or standard {yexillum), outside in the bud ; the 2 

 lateral ones, called wings {ala), intermediate ; the 2 lowest more or less united 

 along one edge into a single boat-shaped one called the keel {carina). Stamens 

 usually 10, either all united or diadelphous, when one is usually free, and the 

 9 others united, or all free. 



Tribe I. GENISTEjE. 



Leaves simple, or of 3 (rarely 5) digitate leaflets, all inserted at the end 

 of the petiole. Racemes terminal or leaf-opposed. Stamens all united in a 

 tube. 



1. CROTALARIA, Linn. 



Calyx 5 -cleft. Standard broad. Wings free, transversely wrinkled above 

 the claw. Keel with a straight or curved point or beak. Stamens all united 

 in a sheath, open on the upper side. Anthers alternately ovoid and oblong. 

 Style suddenly bent in above the ovaiy. Pod inflated. — Herbs or shrubs. 

 Leaves simple and sessile, or Avith 3 or 5 digitate leaflets at the end of the 

 petiole. Stipules scarcely conspicuous in the Hongkong species, Eacemes 

 terminal or leaf-opposed. Pedicels solitary to each bract, with 2 bracteoles 

 close under or even upon the calyx, Plowers yellow, or rarely bluish or 

 purplish. 



