buckbean
名词睡菜
1. 睡菜：buckaroo 牛仔 | buckbean 睡菜 | buckboard 四轮马车
noun
1. perennial plant of Europe and America having racemes of white or purplish flowers and intensely bitter trifoliate leaves
often rooting at water margin and spreading across the surface
Synonym: water shamrock bogbean bog myrtle marsh trefoil Menyanthes trifoliata