1. 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
   - snailflower, snail-flower, snail flower, snail bean, Vigna caracalla, Phaseolus caracalla

Derived forms: corkscrew flowers

Type of: legume, leguminous plant

Part of: genus Vigna, Vigna

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