Vou. II.] PEA FAMILY. 
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Strophostyles hélvola Missouriénsis (S. Wats.) Britton. 
Strophostyles angulosa var. Missouriensis S. Wats. in A. Gray, Man. Ed. 6, 145. 1890. 
Climbing in trees to a height of 20°-30°. Leaflets larger, usually entire; seeds larger. Said to 
bloom later. Perhaps a distinct species. Missouri. 
2. Strophostyles umbellata (Muhl.) Britton. Pink Wild Bean. 
(Fig. 2236.) 
Glycine umbellata Muhl.; Willd. Sp. Pl. 3: 1058. 1803. 
Strophostyles peduncularis Ell. Bot. S. C. 2: 230. 1822. 
Phaseolus helvolus 'T. & G. Fl. N. A. 1: 280. 1838. Not L. 
1753- 
Phaseolus umbellatus Britton, Trans. N. Y. Acad. 9: 10. 
1889. 
Root perennial; stems slender, trailing, branching, 
more or less pubescent with retrorse hairs, 1°-5° long. 
Stipules ovate-lanceolate, 1//-2/’ long; leaflets ovate, 
lanceolate or oblong, obtuse or acutish at the apex, 
rounded at the base, sparingly pubescent, entire, or 
rarely with 1 or 2 shallow lobes; peduncles generally 
much longer than the leaves; flowers several, pink, fad- 
ing yellowish, capitate-umbellate, about 6’ long, similar 
to those of the preceding species; pedicels %4//-1’” long; 
pod linear, straight, little compressed, sessile, 1/—2/ 
long, 2’’ wide, sparingly pubescent; seeds mealy-pubes- 
cent, 114//-2’” long. 
In sandy soil, Long Island to Florida, Indiana and Lou- 
isiana. July—Sept. 
3. Strophostyles pauciflora (Benth. ) S. Wats. 
Small Wild Bean. (Fig. 2237.) 
Phaseolus paucifilorus Benth. Comm. Leg. Gen. 76. 1837. 
Phaseolus letospermus T. & G. Fl. N. A. I: 280. 1838. 
Strophostyles pauciflorus S. Wats. in A. Gray, Man. Ed. 6, 
145. 1890. 
Root annual, stem slender, finely retrorsely hirsute, 
low-climbing or trailing, 1°-2%° long. Stipules ovate- 
lanceolate, 4//-11%4” long; leaflets lanceolate or linear-ob- 
long, obtuse at the apex, rounded at the base, entire, 9//— 
18’ long, 3//-5’’ wide; peduncles exceeding the leaves; 
flowers 2-6, capitate-umbellate, purplish, about 3/’ long; 
pod flat, linear, about 1’ long and 2’’ wide, very pubes- 
cent; seeds purple, glabrous and shining at maturity, 14/7 
long. 
Along rivers, Indiana to Minnesota, south to Mississippi, 
Missouri and Texas. July-Sept. 
46. VIGNA Savi, Mem. Phas. 3:7. 1826. 
Climbing or trailing herbaceous vines, or sometimes erect herbs, with pinnately 3-folio- 
late stipulate leaves, the leaflets broad. Flowers clustered at the ends of long axillary 
peduncles, yellowish or purplish, the rachis of the head or raceme knotty, the bracts and 
bractlets early deciduous. Calyx 5-toothed, or the 2 upper teeth united. Standard nearly 
orbicular, auricled at the base; wings shorter than the standard; keel about equalling the 
standard, slightly incurved. Stamens diadelphous (g andr). Ovary sessile; ovules numer- 
ous; style bearded along the inner side. Pod linear, nearly terete, 2-valved. [In honor of 
Domenic Vigni, a commentator on Theophrastus. ] 
_ About 30 species, natives of warm and tropical regions. Besides the following, another occurs 
in the southern United States. 
