238 FLOEA OF TEXAS. 



monadelphous below ; style smooth ; legume nearly sessile, 

 linear, compressed, the sutures thickened, the valves lined 

 with an intramarginal vein. — Twining herbSf with trifo- 

 liolate leaves, and very large purple flowers on short ax- 

 illary peduncles ; bracts opposite. 



C. ViRGiNiANA, Benth. Rough, with short hooked pu- 

 bescence ; ,§^e«i very slender, much branched; leaflets ob- 

 long or linear-oblong, strongly reticulate ; jjediaicles single 

 or by pairs, 1-4-liowered ; cali/x-teeth subulate, barely ex- 

 ceeding the ovate bracts ; vexillum adhesive; legume slen- 

 der, elongated, curved, many-seeded; Jioiuers 1^' long; 

 legume 4-6' long. 



AMPHICARP^A, Ell. 



Floivers of two kinds : those on the upper racemes perfect, 

 but mostly abortive ; those near the base of the stem or on 

 the prostrate branches apetalous, but fruitful. Calgx tubu- 

 lar, 4:-5-toothed; vexillum obovate and partly enclosing 

 the wings and the keel ; stamens diadelphous, or in the fer- 

 tile flowers distinct or wanting ; fertile legume obovate, 

 fleshy, 1-2-seeded. — Twining annual or perennial UerhSy 

 with trifoliolate leaves; floivers white or purplish, in sim- 

 ple or compound axillary racemes. 



A. mo:n'Oica, Nutt. Hairy; stems much branched; 

 leaflets rhombic-ovate ; sterile racemes single or by pairs, 

 often compound, nodding ; bracts striate; c«Zya;-teeth short, 

 triangular ; fertile legumes hairy. 



^ALACTIA, P. Browne. 



Calyx 4-parted, the upper one broadest ; vexillum oblong 

 or ovate, reflexed in flower; stamens diadelphous; legume 

 more or less compressed, 2-valved, few-many-seeded. — Pros- 

 trate or twining, rarely erect, perennial herbs, with chiefly 



