VOL. II.] 



PEA FAMILY. 



339 



Strophostyles helvola Missouriensis ( S. Wats. ) Britton. 

 Strophostyles angulosa var. Missouriensis S. Wats, in A. Gray, Man. Ed. 6, 145. 1890. 



Climbing in trees to a height of 2p-3O. 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. PI. 3: 1058. 1803. 

 Strophostyles peduncularis Ell. Bot. S. C. 2: 230. 1822. 

 Phaseolus helvolusT. & 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, i-5 long. 

 Stipules ovate-lanceolate, i // -2 // long; leaflets ovate, 

 lanceolate or oblong, obtuse or acutish at the apex, 

 rounded at the base, sparingly pubescent, entire, or 

 rarely with i or 2 shallow lobes; peduncles generally 

 much longer than the leaves; flowers several, pink, fad- 

 ing yellowish, capitate-umbellate, about (> f/ long, similar 

 to those of the preceding species; pedicels l /t"-\" long; 

 pod linear, straight, little compressed, sessile, i / -2 / 

 long, -2" wide, sparingly pubescent; seeds mealy-pubes- 

 cent, i^ // -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 pauciflorus Benth. Comm. Leg. Gen. 76. 1837. 

 Phaseolus leiospermus 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, i-2^ long. Stipules ovate- 

 lanceolate, W~i%" long; leaflets lanceolate or linear-ob- 

 long, obtuse at the apex, rounded at the base, entire, 9"- 

 18" long, $"-$" wide; peduncles exceeding the leaves; 

 flowers 2-6, capitate-umbellate, purplish, about 3 /x long; 

 pod flat, linear, about i / long and 2" wide, very pubes- 

 cent; seeds purple, glabrous and shining at maturity, i%" 

 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 (9 and i). 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. 



