Meaning of VIGNA CARACALLA

WordNet Dictionary
	Definition:		[n]  perennial tropical American vine cultivated for its racemes of showy yellow and purple flowers having the corolla keel coiled like a snail shell; sometimes placed in genus Phaseolus
	Synonyms:		corkscrew flower, Phaseolus caracalla, snail bean, snail flower, snailflower
	See Also:		genus Vigna, legume, leguminous plant, Vigna