Synonyms for Snailflower (same or very similar meaning)
WordNet sense 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):
snail-flower, corkscrew flower, Phaseolus caracalla, snail bean, Vigna caracallaFrom the ODE community, based on WordNetadd/edit