Deer cabbage

''Nephrophyllidium'' is a monotypic genus of aquatic flowering plants in the family Menyanthaceae. The sole species is ''Nephrophyllidium crista-galli''. They are wetland plants with basal reniform and crenate leaves. Flowers are five-parted and white, and the petals are adorned with lateral wings and a midline keel. ''Nephrophyllidium'' is most nearly related to ''Menyanthes'', which is very similar in habit. The genus name is derived from the kidney-shaped leaves , and the specific epithet refers.. more