72 leguminosjE. [Leguminosa. 



an expanded petiole), the leaflets or simple leaves entire or very rarely toothed. 

 Flowers in axillary or terminal racemes or spikes, when terminal often becom- 

 ing leaf-opposed by the growth of a lateral shoot, rarely solitary. 



The largest natural Order next to Composite, and widely distributed over the whole sur- 

 face of the globe. 



Suborder I. Papilionacese. — Corolla very irregular, the upper petal (or standard) 

 outside in the bud. 



Stamens all united or the upper one alone free. 

 Leaves simple or of 2 or 3 leaflets. 

 Pod continuous (not articulate). 

 Leaflets digitate or solitary. 



Stamens completely united in a tube. Pod inflated . . 1. Crotalaria. 

 Upper stamen free, at least at the base. Pod flat . . .21. Eriosema. 

 Leaflets pinnately arranged, the two lateral inserted below the 

 terminal one. 

 Ovary and pod 1-seeded. 



Pod very small, reniform ; the veins much curved . . 2. Medicago. 



Pod flat, reticulate 12. Lespebeza. 



Ovary and pod 2-seeded 20. Rhynchosia. 



Ovary and pod with more than 2 seeds. 

 Two bracteoles under the calyx. 



Standard shorter than the other petals (flower large) . 14. Mucuna. 



Keel spirally twisted 16. Phaseolus. 



Petals regularly papilionaceous. 



Upper calyx-lobes large, 3 lower ones very small . 15. Canavalia. 

 Lobes of the calyx nearly equal. 



Stems twining. Pod long and linear . . . .13. Neustanthus. 

 Stems decumbent or ascending, Pods short, ob- 

 long, turgid 22. Pycnospora. 



Calyx without bracteoles at the base. 



Pod marked with depressed transverse lines between 

 the seeds. 

 Erect undershrub. Standard with two callosities . 17. Cajanus. 

 Stem prostrate or twining. Standard without cal- 

 losities 19. Atylosia. 



Pod without depressed transverse lines. Twiner . . 18. Dunbaria. 

 Pod articulate. 



Leaflets 2 7. Zornia. 



Leaflet 1. Pod scarcely flattened 8. Alysicarpvs. 



Leaflets 3 or rarely 1. Pod very flat. 

 Pod turned back in the calyx. 



Calyx small, with subulate teeth 9. Uraria. 



Calyx enlarged after flowering, with broad teeth . . .10. Lourea. 



Pod straight 11. Desmodium. 



Leaves pinnate, of 5 or more leaflets. 

 Herbs or undershrubs. 

 Pod not articulate. 



Upper stamen free. Anthers tipped by a gland or point . 3. Injmgofera. 

 Stamens monadelphous, at least in the middle. Anthers 



obtuse 4. Tephrosia. 



Pod articulate 6. ^Eschynomene. 



Herbaceous climbers. Stamens 9. Pod 2-valvcd . . . .23. Abrus. 

 Trees or tall woody climbers. 



Pods 2-valved, Stamens 10 5. Millettia. 



Pod indehiscent. 



Anthers small, erect, opening at the top. Flowers small, 



cymose 24. Dalbergia. 



