LEGCMINOSJE. (PULSE FAMILY.) 87 



Stamens monadelphous : anthers of 2 forms. Leaves simple, or palmately compound. 



1. CROTALARIA. Calyx 5-lobed. Legume inflated. Upper stipules decurrent. 



2. LUPINUS. Calyx 2-lipped. Legume flattened. Stipules not decurrent. 



* * Stamens diadelphous : anthers alike. Leaves trifoliolate, rarely palmate or pinnate, the 



earliest ones alternate. 



3. MEDICAGO. Legume membranaceous, curved or coiled, 1 - many-seeded. Flowers 



racemed. 



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



racemed or spiked. 



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

 ti. HOSACKIA. Legume 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. 



H- Legume included in the calyx. 



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

 imperfect. 



8. PETALOSTEMOX. Stamens5, 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. AMORPIIA. Stamens 10, monadelphous. Wings and keel none. 



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



pinnate. 

 i- Trees or shrubs. 



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



12. \VISTARIA. Legume nearly terete, coriaceous, contracted between the seeds. Twining 



shrubs. 



i- i- Ilerbs. 



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



unequally pinnate. 



14. 1XDIGOFERA. Calyx minute, 5-cleft. Vexillum small. Legume terete or angled, 



2 - many-seeded. Leaves unequally pinnate. 



15. GLOTTIDIUM. Calyx truncate. Legume oblong, 2-seeded. Leaves abruptly pinnate. 



16. 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. 



17. ASTRAGALUS. Stamens 10, diadelphous. Legume tumid. 



TRIBE II. VICIE.?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. 



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



19. LATHYRCS. Style flattened, bearded on the side facing the vexillum. 



TRIBE III. HEDYSAREjE. Stamens monadelphous or diadelphous. Legume sepa- 

 rating transversely into 1-seeded indehiscent reticulated joints, or 1-jointed. Stems not 

 twining. 



* Flowers yellow. 



20. JESCHYXOMEXE. Leaves pinnate. Stamens diadelphous (5 & 5). Flowers perfect. 



21. ZORNIA. Leaves palmately compound. Legume 2 - 5- jointed. Flowers perfect. 



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



23. CHAPMAXXIA. Leaves pinnate. Anthers alike. Flowers monoecious. 



* Flowers white or purplish. 



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



