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。
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.
结果发现：除了翼瓣和花丝表皮以外，气孔均分布在花朵的其它器官表皮上， 如花萼、旗瓣、龙骨瓣、雌蕊托、子房、花柱和花药。
Photosynthesis of flower organs was also measured. Stomata were on the surface of sepal , vexilla, keel, anther, gynophore, ovary, and style but not wing or filaments.
结果发现： 除了翼瓣和花丝表皮以外， 气孔均分布在花朵的其它器官表皮上， 如花萼、旗瓣、龙骨瓣、雌蕊托、子房、花柱和花药。
Photosynthesis of flower organs was also measured. Stomata were on the surface of sepal, vexilla, keel, anther, gynophore, ovary, and style but not wing or filaments.
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