502 LEGUMlNOSAE (PULSE FAMILY) 



= = Flowers large and showy ; standard broad ; wings free. 

 29. Sesbania. Leaves even -pinnate. Ours herbs, 



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



81. Wisteria. Pad tumid, marginless. Woody twiners. Leaflets obscurely stipellate. 



-= =^ = Standard narrow, erect ; pod turgid or inflated ; perennial herbs. 



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



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

 83. Oxytropis. Keel tipped with an erect point ; otherwise as Atftragalus. 

 54. Glycyrrhiza. Y\ovfev&^ eta,, oi A«tragalae. Anther-cells confluent. Pod prickly op muri- 

 cate, short, nearly indehiscent. 

 *- -(- -H Herbs ; no tendrils ; pod transversely 2-8everal-jointed, the reticulated 1-seeded Joints 

 indehiscent, or sometimes reduced to one such joint. 

 -H- Leaves pinnate, with several leaflets, not stipellate. 

 85. Aeschynomene. Stamens eqoally diadelphous (5 and 5). Calyx 2-lipped. Pod several- 

 jointud ; joints square. 



36. Coronilla. Stamens unequally diadelphous (9 and 1). Calyx S-toothed. Joints suboylin- 



dric, 4-angled. Flowers umbellate. 



37. Hedysarum. Stamens unequally diadelphous (9 and 1). Calyx 5-cleft. Pod several-jointed ; 



joints roundish. 



-H- ++ Leaves pinnately 8-foliolate, rarely 1-foliolate. 



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



&eveial jointed. Flowers all of one sort and complete. Leaflets stipellate. 



39. Lespedeza. stamens diadelphous (9 and 1); anthers uniform. Pod 1-2-jointed. Flowers 



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



40. Stylosanthes. Stamens monodelphous ; anthers of 2 sorts. Pod 1-2-jointed. Calyx de- 



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

 ■H- ++ ++ Leaves digltately 2- or 4-foliolate. 



41. Zomia. Flowers spicate, each enveloped by 2 veiny leaf-like bracts. 



■i- -I- -I- -!- Herbs vnt\i abruptly pinnate leaves, terminated by a tendril or bristle ; stamens diadel- 

 phous; pod continuous, 2-valved, few-several- seeded. 



42. Vicia. Wings coherent with the keel. -Style filiform, bearded with a tuft or ring of hairs at 



tlie apex. 



48. Lathynis. Wings nearly free. Style somewhat dilated and flattened upwards, bearded 



down the inner face. 



*--!-■«-■(--*- Twining (sometimes only trailing) herbs ; leaves pinnately 8(rarely 1 or 5-7)-foUolate; 



no tendrils ; peduncles or flowers axillary ; pod not jointed, 2-valved. 



++ Leaves pinnately 5-many-foliolate. 



44. Apios. Herbaceous twiners ; leaflets &-9. Keel slender and much incurved or coiled. 



■M- 4+ Leaves S-foliolate ; ovules and seeds several. 

 = Style bearded lengthwise on the upper surface. 



45. Phaseolus. Keel spirally coiled ; standard recurved-spreading. Flowers racemose. Corolla 



(in ours) purple. Seeds round-reniform. 



46. Vigna. Keel strongly curved but not forming a spiral. Flowers few in pedunculate heads 



or very .short racemes. Corolla (in mirs) pale yellow. 



47. Strophostyles. Keel long, strongly incurved but not forming a spiral. Flowers few in 



pedunculate heads. Corolla purple, Seods oblong, mostly pubescent. 



48. Clitoria. Keel scythe-shaped ; standard spurred at the base, large and showy, pale blue. 



•= = Style bearded at the summit about the stigma. 



49. Centrosema. Standard mtich longer than the other petals. Pod linear, narrow; the valves 



spirally twisted after dehiscence. 



50. Dolichos. Standard little exceeding the other petals in length. Fod lunate-ohlong; the 



valves broad, not spirally colled in dehiscence. 



^ = = Style beardless. 

 61. Amphicarpa. Calyx tubular, 4-5- toothed. Standard erect; keel almost straight. Some 

 apetalous especially fertile flowers at the base of the plant. Bracts persistent. 



