Flowers: Sepals rounded at tips, corolla yellow, outside with red lines.
花：萼片圆尖，花冠黄色，外面有红线。
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.
热带美洲一种多年生藤本植物，有时由于美丽的总状花序的紫色和黄色而栽培，花冠的龙骨瓣盘卷像一个蜗牛的壳。
Bud scales usually deciduous. Corolla white, or yellow blushed to pink, to pink; ovary eglandular.
芽鳞通常落叶。花冠白色，或黄色到粉红色，到粉红色；子房无腺体。
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