LEGUMINOSZ,. (PULSE FAMILY.) 107 
1. E. herbacea, L. Stems herbaceous, several from a very thick root, 
prickly, the flowering ones mostly leafless ; leaves long-petioled ; leaflets ovate 
or somewhat hastate; vexillum lanceolate, folded ; seeds scarlet. — Light sandy 
soil, Florida to North Carolina, and west to Mississippi. April and May. — 
Stems 29-49 high. Racemes 19 -29 long. Flowers 2'long. Legume open- 
ing by one suture opposite the seeds. 
31. CLITORIA, L 
Calyx tubular, 5-toothed. Vexillum very large, spurless on the back, obovate, 
emarginate. Keel shorter than the wings.  Stamens monadelphous below. 
Style curved, hairy. Legume stipitate, linear-oblong, torulose, veinless. — Peren- 
nial herbs, with trifoliolate leaves, and very large purple flowers on axillary 
peduncles, Bracts opposite. 
l. C. Mariana, L. Smooth; stem erect or twining ; leaflets ovate-oblong, 
pale beneath ; peduncles shorter than the leaves, 1 — 3-flowered ; legume 3 - 4- 
seeded. — Dry soil, Florida to Mississippi, and northward. July and August. — 
Stem 19-3? long. Flowers 2! long, pale purple. Bracts shorter than the calyx. 
Legume 13/ - ?! long. 
32. CENTROSEMA, DC. 
Calyx short, 5-cleft, the 2 upper lobes more or less united. Vexillum very 
large, spurred on the back, orbicular, emarginate. Keel nearly as long as the 
wings. Stamens monadelphous below. Style smooth. Legume nearly sessile, 
linear, compressed, the sutures thickened, the valves lined with an intra-margi- 
nal vein. — Twining herbs, with trifoliolate leaves, and very large purple flowers 
on short axillary peduncles. Bracts opposite. 
1. C. Virginiana, Benth. Rough with a short hooked pubescence ; stem 
Very slender, much branched; leaflets oblong or linear-oblong, strongly reticu- 
late; peduncles single or by pairs, 1 - 4-flowered ; calyx-teeth subulate, barely 
exceeding the ovate bracts; vexillum adhesive ; legume slender, elongated, 
curved, manf-seeded. (Clitoria Virginiana, Willd.) — Dry soil, Florida to 
Er a and northward. June- September. — Flowers 1}/ long. Legume 
33. AMPHICARPÆA, El . 
Flowers of 2 kinds ; those on the upper racemes perfect, but mostly abortive, 
those near the base of the stem or on the prostrate branches apetalous, but 
ul Calyx tubular, 4—5-toothed. "Vexillum obovate and partly enclosing 
the wings and keel. Stamens diadelphous, or in the fertile flowers distinct or 
Wanting. Fertile legume obovate, fleshy 
Perennial herbs 
