654 FABACEAE 
blades rhomboidal-oval to 3-lobed, 2-4 cm. long, acute or acutish: peduncles twice or 
thrice as long as the leaves: pedicels stout, about 1 mm. long: calyx glabrate, 3-3.5 mm. 
long ; lobes abruptly pointed, about as long as the tube: corolla purple or purplish, fading 
greenish ; standard with a blade fully 1 cm. wide: pods linear, nearly terete, 6-10 cm. 
long. [Phaseolus helvolus L.] 
In sandy soil, Quebec to Minnesota, Massachusetts, Florida and Texas. Summer and fall. 
4. Strophostyles Missouriénsis (S. Wats.) Small. Annual, sparingly pubescent. 
Stems climbing, 3-9 m. long, branching, retrorsely pubescent: leaflets 3, the blades 
ovate, 3-8 em. long, often somewhat rhomboidal, lustrous above, abruptly acuminate or 
apiculate, short-stalked : peduncles becoming longer than the subtending leaves: calyx 
sparingly pubescent, the lower and middle lobes lanceolate, as long as the tube or longer: 
corolla pink or bluish ; standard with a thin blade 1-1.5 cm. wide: pods linear, 7-9 mm. 
long, somewhat flattened. [S. angulosa var. Missouriensis S. Wats.] 
In alluvial soil, Missouri and Arkansas. Fall. 
52. VIGNA Savi. 
Vines, with prostrate or twining stems. Leaves alternate: blades pinnately 3-folio- 
late: stipules usually sessile at the base of the petiole: leaflets with entire or sometimes 
lobed blades. Flowers perfect, few in cluster-like racemes terminating axillary peduncles. 
Calyx slightly 2-lipped: lobes all unequal, relatively short. Corolla yellowish or pur- 
plish, sometimes variegated: standard with a suborbicular blade auricled at the base: 
wings curved : keel about as long as the wings, incurved with or without a spirally twisted 
beak. Stamens diadelphous (9 and 1). Anthers alike. Style filiform, thickened or 
dilated. Stigma oblique or lateral. Ovules numerous. Pod narrow, nearly terete, straight 
or curved. CmiNA Bean. Cow Pra. 
Standard less than 2 em. long: pods pubescent. l. V. repens. 
Standard over 2 em. long: pods glabrous. 2. V. Sinensis. 
1. Vigna répens (L.) Kuntze. Foliage usually pubescent with rather appressed 
hairs. Stems trailing or climbing, branching, when pubescent the hairs reflexed : leaflets 
3, the blades ovate to lanceolate or linear, 2-8 cm. long, acute, more or less distinctly re- 
ticulated, short-stalked : petioles usually longer than the leaflets: peduncles surpassing the 
subtending leaves, retrorsely pubescent at the top: pedicels 1-3 mm. long, corymbose: 
calyx campanulate, oblique ; lobes triangular to lanceolate : corolla yellow ; standard with 
a nearly reniform, notched blade, less than 2 cm. long: pods linear, 4-5 mm. long, nearly 
terete, pubescent. [ V. luteola ( Jacq.) Benth. ] 
In marshes and thickets along the coast, Georgia to Florida and Texas. Also in tropical America. 
2. Vigna Sinénsis (L.) Endl. Foliage glabrous or sparingly pubescent. Stems 
trailing or climbing, 0.3-2 m. long, branching : leaflets 3, the blades ovate or ovate-hastate, 
8-15 cm. long, acutish to acuminate, the lateral ones very inequilateral : peduncles usually 
shorter than the leaves, minutely pubescent near the ends: pedicels stout, 1-2 mm. long: 
calyx campanulate, 7-8 mm. long; lobes acuminate, somewhat shorter than the tube : 
corolla yellowish tinged with purple; standard over 2 cm. long: pods fleshy, 10-18 cm. 
long, slightly curved, glabrous. 
In thickets and waste places, North Carolina to Missouri, Florida and Texas. Cultivated and ad- 
ventive or naturalized. Summer and fall. 
53. CANAVALIA DC. 
Perennial herbs, with prostrate or twining stems. Leaves alternate, with small stipules: 
blades pinnately 3-foliolate: leaflets with entire, often ample, thickish blades. Flowers 
perfect, in axillary peduncled racemes. Calyx 2-lipped, the upper lip truncate or 2-lobed, 
the lower one entire or 3-lobed. Corolla of various colors: standard reflexed ; blade sub- 
orbicular, large : wings curved or twisted: keel-petals incurved, broader than the wings, 
obtuse or with an inflexed or spiral beak. Stamens diadelphous (9 and 1) or monadel- 
phous to the middle. Style glabrous, incurved, or involute with the keel. Ovules several. 
Pod flat or slightly swollen, oblong or broadly linear, 2-valved. Seeds white, red or d 
- : RE . C. obtusifolia. 
taies ABUSE uf ep Er Mem cs amrrk — Gad 
1. Canavalia obtusifdlia (Lam.) DC. Foliage finely strigillose. Stems D 
or climbing, 1-5 m. long, branching : leaflets 3, the blades leathery, suborbicular to OV 
