1. Perennial tropical American vine cultivated for its racemes of showy yellow and purple flowers with a coiled keel
   "The Vigna caracalla's unique bloom resembles a snail shell";
   - snailflower, snail-flower, snail flower, snail bean, corkscrew flower, Phaseolus caracalla

Type of: legume, leguminous plant

Part of: genus Vigna, Vigna

Encyclopedia: Vigna caracalla