FABACEAE. 



VOL. II 



2. Strophostyles umbellata (Muhl.) Britton. Pink Wild Bean. Fig. 2648. 



Glycine umbellata Muhl.; Willd. Sp. PI. 3: 1058. 1803. 

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



Phaseolus helvolus T. & G. Fl. N. A. i : 280. 1838. Not L. 

 1753. 



Phaseolus umbellatus Britton, Trans. N. Y. Acad. 9: 10. 



1889. 



S. umbellata Britton ; Britt. & Brown, 111. Fl. z : 339. 1907. 

 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 6" long, similar 

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

 pod linear, straight, little compressed, sessile, I'-z' long, 

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

 ii"-2" long. 



In sandy soil, Long Island to Florida, Indiana, Arkansas 

 and Texas. July-Sept. 



3. Strophostyles pauciflora (Benth.) S. Wats. 

 Small Wild Bean. Fig. 2649. 



Phaseolus pauciflorus Benth. Comm. Leg. Gen. 76. 1837. 

 Phaseolus leiospennus T. & G. Fl. N. A. i : 280. 1838. 



Strophostyles pauciflorus S. Wats, in A. Gray, Man. Ed. 6, 145. 

 1890. 



Roots annual ; stem slender, finely retrorsely hirsute, low- 

 climbing or trailing, i-2i long. Stipules ovate-lanceolate, 

 i"-ii" long; leaflets lanceolate or linear-oblong, obtuse at 

 the apex, rounded at the base, entire, 9"-i8" long, 3"-s" 

 wide ; peduncles exceeding the leaves ; flowers 2-6, capitate- 

 umbellate, purplish, about 3' long; pod flat, linear, about i' 

 long and 2" wide, very pubescent; seeds purple, glabrous 

 and shining at maturity, ii"-2" long. 



Along rivers, Indiana to South Dakota, Colorado, Mississippi, 

 Missouri, Kansas and Texas. July-Sept. 



50. VIGNA Savi, Mem. Phas. 3 : 7. 1826. 



Climbing or trailing herbaceous vines, or sometimes erect herbs, with pinnately 3-foliolate 

 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 numerous; 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. Type species : Dolichos lutcolus Jacq. 



