What is "corkscrew flower"

n. A plant of the species (taxlink Vigna caracalla species noshow=1), often used as an ornamental

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 [syn: snailflower, snail-flower, snail flower, snail bean, Vigna caracalla, Phaseolus caracalla]