94 LEGUMINOS.E. (PULSE FAMILY.) 



4. MELILOTUS. Legi me coriaceous, straight, rugose or veined, 1 - 4-seeded. Flowers 



racemed or spiked. 



5. TRIFOLIUM. Legume smooth, membranaceous, 1 -4-seeded. Flowers capitate. 



6. HOSACKIA. Legums straight, many-seeded. Peduncle 1-3-flowered. 



* * * Stamens monadelphous or diadelphous. Legume mostly 1-seeded and indehiscent. 



Plants dotted with small dark glands. Earliest leaves opposite. 



1- Legume included in the calyx. 



7. PSORALEA. Corolla papilionaceous. Stamens 10, diadelphous : half of the anthers 



often imperfect. 



8. PETALOSTEMON. Stamens 5, united into a cleft tube, and adnate to the claws of four 



of the nearly regular petals. 



9. DALEA. Stamens 9 or 10, the tube partly adnate to the claws of the petals. 



i- <- Legume exserted. 



10. AMORPHA. Stamens 10, monadelphous. Wings and keel none. 



* * * * Stamens mostly diadelphous. Legume 1 - many-seeded, 1-celled, 2-valved. Leaves 



pinnate. 



>- Trees or shrubs. 



11. ROBINIA. Legume flat and thin, margined on one edge. Trees or shrubs. 



1'J. WISTARIA. Legume nearly terete, coriaceous, contracted between the seeds. Twin- 

 ing shrubs. 



t- -i- Herbs. 



13. TEPHROSIA. Calyx 5-cleft. Vcxillum large. Legume compressed, many-seeded. 



Leaves unequally pinnate. 



14. IXDIGOFERA. Calyx minute, 5-cleft. Vexillum small. Legume terete or angled, 



'2 - many-seeded. Leaves unequally pinnate. 



15. SESBANIA. Calyx 5-toothed. Legume very long and slender, many-seeded. Leaves 



abruptly pinnate. 



***** Stamens diadelphous. Legume 2-celled lengthwise, or 1-celled, with one of the 

 sutures turned inward. Leaves pinnate. 



1C. ASTRAGALUS. Stamens 10, diadelphous. Legums tumid. 



TRIBE II. VIC1E.-E. Stamens diadelphous (9 & 1). Legume 2-valved, not jointed. 

 Cotyledons thick and fleshy, remaining under ground in germination. Climbing 

 vines ; the petioles of the pinnate leaves ending in a tendril. 



17. VICIA. Style filiform, bearded at the apex, or on the side facing the keel. 



18. LATHYRUS. Style flattened, bearded on the side facing the vexillum. 



TRIBE III. HEDYSARE..E. Stamens monadelphous or diadelphous. Legume sepa- 

 rating transversely into 1-seeded indehiscent reticulated joints, or 1-jointed. Stems 

 not twining. 



* Flowers yellow. 



19. jESCHYNOMENE. Leaves pinnate. Stamens diadelphous (5 & 5). Flowers perfect. 

 'JO. ZORNIA. Leaves palmately compound. Legume 2 -5- jointed. Flowers pei feet. 



21. STYLOSANTHES. Leaves trifoliolate. Anthers of 2 forms. Flowers monoecious. 



22. CHAPMANIA. Leaves pinnate. Anthers alike. Flowers monoecious. 



* * Flowers white or purplish. 



23. LESPEDEZA. Legume 1-jointed. Peduncles axillary. 



24. DESMODIUM. Legume 2 - 6-jointed. Bristly. Racemes terminal. 



TRIBE IV. PHASEOLE^E. Stamens monadelphous or diadelphous (9 & 1). Legume 

 2-valved, not jointed. Cotyledons thick and fleshy ; usually raised above ground in 

 germination. Chiefly twining vines. 



* Ovary 1 - 2-ovuled. 



25. RHYXCHOSIA. Legume oblong. Flowers yellow. Leaves trifoliolate. 







