Any of various submersed aquatic herbs of the genus Elodea,native to the New World,having opposite or whorled one-nerved narrow leaves and small axillary flowers.

• 伊乐藻，原产美洲的几种伊乐藻属水底草本植物之任一种，有对生或轮生的单脉狭长叶片和腋生的小花。