Vigna caracalla
n 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 [syn: {snailflower}, {snail-flower}, {snail
flower}, {snail bean}, {corkscrew flower}, {Vigna
caracalla}, {Phaseolus caracalla}]