LEGUMINOS.E (pulse FAMILY.) 117 



sandy soil, Florida to North Carolina, and west to Mississippi. April -May. 

 — Stems 2° -4° high. Racemes l°-2° long. Flowers 2' long. Legume 

 opening by one suture opposite the seeds. 



Var. arborea. Stems woody, 10° -20° higli, widely branching at the 

 summit ; racemes axillary, few-flowered ; flowers smaller ; legume erect. — 

 South Florida. 



30. CLITORIA, L. 



Calyx tubular, 5-toothed. Vexillnm very large, spurless on the back, 

 obovate, emargiuate. Keel shorter than the wings. Stamens monadelphous 

 below. Style curved, hairy. Legume stipitate, linear-oblong, torulose, vein- 

 less. — Perennial herbs, with trifoliolate leaves, and very large purple flowers 

 on axillary peduncles. Bracts opposite. 



1. C Mariana, L. Smooth; stem erector twining; leaflets ovate-ob- 

 long, pale beneath; peduncles shorter than the leaves, 1 -3-flowered; legume 

 3-4-seeded. — Dry soil. July -August. — Stem 1°-. 3° long. Flowers 2' 

 long, pale purple. Bracts shorter thau the calyx. Legume l|'-2' long. 



31. CENTROSEMA, DC. 



Calyx short, 5-cleft, the 2 upper lobes more or less united. Vexilluin very 

 large, spurred on tlie back, orbicular, emarginate. Keel nearly as long as 

 the wings. Stamens monadelphous below. Style smooth. Legume nearly 

 sessile, linear, compressed, the sutures tliickeued, the valves lined with an 

 intra-marginal vein. — Twining herbs, with trifoliolate leaves, and very large 

 purple flowers on short axillary peduncles. Bracts opposite. 



1. C. Virginiana, Beuth. Rough with a short hooked pubescence; 

 stem very slender, much branched ; leaflets ovate to linear-oblong, strongly 

 reticulate ; peduncles single or by pairs, 1 -4-flowered ; calyx teeth subulate, 

 barely exceeding the ovate bracts ; vexillum adhesive ; legume slender, elon- 

 gated, curved, many-seeded. — Dry soil. June- Sept. — Flowers 1|^' long. 

 Legume 4' - 6' long. 



32. AMPHICARP^A, Ell. 



Flowers of two kinds ; tiiose on the upper racemes perfect, but mostly abor- 

 tive, those near the base of the stem or on the prostrate branches apetalous, 

 but fruitful. Calyx tubular, 4 - 5-toothed. Ye.xillum obovate and partly 

 enclosing the wings and keel. Stamens diadelphous, or in the fertile flowers 

 distinct or wanting. Fertile legume obovate, fleshy, 1 - 2-seeded. — Twining 

 annual or perennial herbs, witli trifoliolate leaves. Flowers white or purplisli, 

 iu simple or cnuipound axillary racemes. 



1. A. monoiea, Nutt. Hairy; .'^tems much branched; leaflets rhombic- 

 ovate ; sterile racemes single or by pairs, often compound, nodding ; bracts 

 striate ; calyx teeth short, triangular ; fertile legumes hairy. Rich soil. 

 August- Sept. 



33. GALACTIA, P. Browne. 



Calyx 4-toothed, the upper one broadest. Vexillum oblong or obovate, re- 

 flexed in flower. Stamens diadelplions. Legume more or less compressed, 

 2-valved, few - many-seeded. — Prostrate or twining, rarely erect, perennial 



