552 Leguminosae 



lA. Stamens 10, free, slightly exserted; anthers with a deciduous, stiped gland at apex; tendril-bearing, evergreen, eglandular-leaved vines 

 with spicate inflorescence 1. Entada 



IB. Stamens numerous, exserted, the filaments connate at base; anthers not glandular; deciduous trees without tendrils; petioles with 

 glands; flowers in heads 2. Albizia 



II. Subfamily CAESALPINOIDEAE: Trees or herbs; flowers zygomorphic, the corolla not or only slightly papilionaceous; 

 sepals and petals 5, imbricate in bud, the upper petal enclosed by the others; stamens 10 or sometimes fewer, free. 



lA. Leaves pinnately compound. 

 2A. Trees or shrubs, usually prickly or spiny; at least some of the leaves bipinnate; anthers versatile. 



3A. Flowers small, green or greenish yellow, in spikes; trees 3. Gleditsia 



3B. Flowers rather large, yellow to orange; shrubs or vines 4. Caesalpinia 



2B. Unarmed herbs (in ours) ; leaves simply pinnate (in ours) ; anthers basifixed 5. Cassia 



IB. Leaves bifid or composed of 2 leaflets; tendrils often present 6. Bauhinia 



III. Subfamily PAPILIONAT AE : Trees, herbs, or vines; flowers distinctly papilionaceous; petals imbricate in bud, the upper- 

 most petal (standard) on the outside; stamens 5 or 10, monadelphous, diadelphous or free. 



lA. Stamens 10, free or nearly so; trees or shrubs, rarely herbs. 

 2A. Leaves pinnate; leaflets many. 



3A. Legumes moniliform, not flattened 7. Sophora 



3B. Legumes flattened. 



4A. Leaflets opposite or nearly so; winter-buds naked in the axils of leaves 8. Maac\ia 



4B. Leaflets alternate; winter-buds entirely covered with the base of the petiole 9. Cladrastis 



2B. Leaflets 3 10. Thermopsis 



IB. Stamens with filaments connate at base, monadelphous or diadelphous. 

 5A. Legumes fleshy, indehiscent. 



6A. Legumes rather flattened ; trees, leaflets 3-7 11. Pongamia 



6B. Legumes not flattened; evergreen shrubs, leaflets 3(-7) 12. Etichresta 



5B. Legumes membranous to coriaceous, not fleshy. 

 7 A. Legumes jointed. 



8A. Filaments wholly connate into a complete tube; anthers dimorphic; leaflets 2 or 4 13. Zornia 



8B. Filaments nearest the standard free; anthers all alike; leaflets 1 or 3, sometimes 5, or many. 

 9A. Leaflets 1, 3, or 5. 



lOA. Legumes 1-seeded, flat, indehiscent, not jointed. 



IIA. Leaflets pinnately arranged; shrubs or perennial herbs 14. Lespedeza 



1 IB. Leaflets digitately arranged; annuals 15. Ktimmerowia 



lOB. Legumes more than 1-seeded, jointed 16. Desmodium 



9B. Leaflets many. 



12A. Leaflets even in number. 



13A. Legumes coiled, included within the calyx 17. Smithia 



13B. Legumes elongate, straight, much exserted from the calyx 18. Aeschynomene 



12B. Leaflets odd in number; legumes exserted 19. Hedysarum 



7B. Legumes not jointed. 



14A. Leaves even-pinnate, with the rachis ending in a tendril or mucro. 



15A. Tube of the filaments obliquely truncate at apex; style slender, with a tuft of hairs at apex 20. Vicia 



15B. Tube of the filaments rectangularly truncate at apex; style flattened, hairy on inner side 21. Lathyrus 



14B. Leaves odd-pinnate or trifoliate, rarely digitate, without tendrils. 

 16A. Twining or trailing herbs, with 3 (rarely 5 or 7) leaflets. 



17A. Leaves glandular-dotted beneath; racemes with axis not thickened on nodes; styles glabrous. 



18A. Legumes 3- to 8-seeded 22. Dtmbaria 



18B. Legumes 1- or 2-seeded 23. Rhynchosia 



17B. Leaves not glandular-dotted. 

 19A. Style bearded. 



20A. Keel dextrorsely semicontorted, spurred on one side 24. Azu/^ia 



20B. Keel not contorted or spurred 25. Vigna 



19B. Styles glabrous, not bearded. 



21A. Leaflets 3-5; keel coiled 26. Apios 



21B. Leaflets 3; keel not coiled. 



22A. Flowers yellowish; calyx nearly truncate at apex 27. Dumasia 



22B. Flowers purple, red, or white; calyx usually with evident teeth. 



23A. Keel conspicuously larger than the standard and wing 28. Muciina 



23B. Keel, standard, and wings nearly equal. 



24A. Stamens monadelphous; flowers and legumes of one form. 



25A. Upper 2 calyx-teeth broad, larger than the lower; legumes broad, with a longitudinal rib along the outer 



suture on each side 29. Canavalia 



25B. Upper 2 calyx-teeth shorter and smaller than the lower; legumes narrower and smaller, hispid, without a 

 rib on each side. 



