124 LEGUMINOS^E. (PULSE FAMILY.) 



= Herbage not glandular-dotted (except in n. 23); stamens mostly diadelphous ; pod 

 2-valved, several-seeded ; leaves pinnately several-foliolate ; flowers racemose. 

 a. Wings cohering with the keel ; pod flat or 4-angled ; hoary perennial herbs. 



17. Tephrosia. Standard broad. Pod flat. Leaflets pinnately veined. 



18. Indigofera. Calyx and standard small. Pod 4-angled. Leaflets obscurely veined. 

 &. Flowers large and showy ; standard broad ; wings free ; woody ; leaflets stipellate. 



19. Robinia. Pod flat, thin, margined on one edge. Trees or shrubs. 



20. Wistaria. Pod tumid, marginless. Woody twiners ; leaflets obscurely stipellate. 



c. Standard narrow, erect ; pod turgid or inflated ; perennial herbs. 



21. Astragalus. Keel not tipped with a point or sharp appendage. Pod with one or both 



the sutures turned in, sometimes dividing the cell lengthwise into two. 



22. Oxytropis. Keel tipped with an erect point ; otherwise as Astragalus. 



23. Glycyrrhiza. Flowers, etc., of Astragalus. Anther-cells confluent. Pod prickly or 



muricate, short, nearly indehiscent. 



4- +- - Herbs with pinnate or pinnately 1 - 3-foliolate leaves ; no tendrils ; pod transversely 

 2-several-jointed, the reticulated 1-seeded joints indehiscent, or sometimes reduced to 

 one such joint. (HEDYSARE.E.) 



= Leaves pinnate, with several leaflets, not stipellate. 



24 JEgchynomene. Stamens equally diadelphous (5 and 5). Calyx 2-lipped. Pod several- 

 jointed ; joints square. 



25. Coroiiilla. Stamens unequally diadelphous (9 and 1). Calyx 5-toothed. Joints oblong, 



4-angled. Flowers umbellate 



26. Hedygarum. Stamens unequally diadelphous (9 and 1). Calyx 5-cleft. Pod several- 



jointed ; joints roundish. 



= = Leaves pi.in&^ely 3-foliolate, rarely 1-foliolate. 



27. Desmodium. Stamens diadelphous (9 and 1) or monadelphous below. Calyx 2-lipped. 



Pod several-jointed. Flowers all of one sort and complete. Leaflets stipellate. 



28. Lespedeza. Stamen s diadelphous (9 and 1); anthers uniform. Pod 1 - 2-jointed. Flow- 



ers often of 2 sorts, the more fertile ones apetalous. Leaflets not stipellate. 



29. Stylosantheg. Stamens monadelphous ; anthers of 2 sorts. Pod 1 - 2-jointed. Calyx 



deciduous, the tube narrow and stalk-like. Leaflets not stipellate. 



*- +- *- H- Herbs with abruptly pinnate leaves, terminated by a tendril or bristle ; stamens 

 diadelphous ; pod continuous, 2-valved, few-several-seeded. ( VICIE^:. ) 



30. Vicia. Wings adherent to the keel. Style filiform, bearded with a tuft or ring of hairs 



at the apex. 



31 . Lathyrug. Wings nearly free. Style somewhat dilated and flattened upwards, bearded 



down the inner face. 



t- - - <-- Twining (sometimes only trailing) herbs ; leaves pinnately 3- (rarely 1- or 

 5-7-) foliolate ; no tendrils } peduncles or flowers axillary pod. not jointed, 2-valved. 

 (PHASEOLEJI.) 



= Leaves pinnate. 



32 Apiog. Herbaceous twiner ; leaflets 5-7. Keel slender and much incurved or coiled. 

 = = Leaves 3-foliolate. Ovules and seeds several. Flowers not yellow. 



33. Phaseolus. Keel spirally coiled : standard recurved-spreading. Style bearded length- 



wise. Flowers racemose. Seeds round-renifonn. 



34. Strophostyles. Keel long, strongly incurved. Style bearded lengthwise. Flowers 



sessile, capitate, few. Seeds oblong, mostly pubescent. 



35. Centrosema. . Calyx short, 5-cleft. Standard with a spur at the base ; keel broad, 



merely incurved. Style minutely bearded next the stigma. 



36. Clitoria. Calyx tubular, 5-lobed. Standard erect, spurless ; keel scythe-shaped. 



Style bearded down the inner face. 



37. Ampliicarpaea. Calyx tubular, 4 -5-toothed. Standard erect ; keel almost straight. 



Style beardless. Some nearly apetalous fertile flowers next the ground. 



