54. Leguminosae 127 



14. Plants with recurved prickles; flowers rose colored; corolla 

 funnel-form; pods prickly, 4-anglcd, or nearly terete 



2. Schrankia 



13. Leaves pinnate; flowers yellow 6. Cassia 



10. Leaves not e\en-pinnate. 



15. Leaves trifoliolate, or digitate with usually not more than 5 leaf- 

 lets (rarely unifoliolate). 

 16. Leaves (and other parts of the plant) more or less glandular- 

 punctate; leaflets 3-5, entire 16. Psoralea 



16. Leaves not at all glandular-punctate. 

 17. Leaflets toothed. 



18. Flowers capitate. 



19. Pods straight; stamens adherent to the corolla 



12. Tri folium 



19. Pods curved or coiled; stamens free from the 



corolla 14. Medicago 



18. Flowers reflexed in long slender racemes, white or 



yellow; pods small, straight, reflexed 13. Melilotus 



17. Leaflets entire. 



20. Fruit a loment, i.e., breaking transversely into 1- 

 seeded, indehiscent segments, or consisting of a 

 single segment. 

 21. Pods 1- to several-jointed and -seeded; leaflets 



usually stipellate; flowers purple or white 



27. Desmodium 



21. Pods of a single 1 -seeded joint (the lower joint 



when present empty and stalk-like) ; leaflets 



without stipels, usually prominently veined. 



22. Flowers purplish or yellowish-white; stamens 



diadclphous (9 + 1); anthers all alike; 



pods not longitudinally ribbed ...28. Lespedeza 



22. Flowers yellow; stamens monadelphous; anthers 



in 2 series; pods longitudinally ribbed 



29. Stylosanthes 



20. Fruit a legume. 



23. Leaflets not stipellate. 



24. Flowers in heads; pods small, often included in 

 the calyx, 1- to 6-seeded, not stipitate; 



stamens diadelphous 12. Trifolium 



24. Flowers in racemes, or solitary. 



25. Flowers whitish (or yellow) in racemes; 

 stamens distinct; pods stipitate, turgid or 

 inflated ; plants tending to turn black in 



drying 8. Baptisia 



25. Flowers pink, solitary; stamens diadelphous; 

 pods linear, somewhat compressed, not 



stipitate 15. Hosackia 



23. Leaflets stipellate. 



26. Style glabrous; plants twining; flowers purplish 

 or white. 

 27. High-climbing vines; leaflets usually lobed ; 



flowers with the odor of grapes 



38. Pueraria 



