liliopsid genus, monocot genus - genus of flowering plants having a single cotyledon (embryonic leaf) in the seed

family Hydrocharidaceae, family Hydrocharitaceae, frog's-bit family, frogbit family, Hydrocharidaceae, Hydrocharitaceae - simple nearly stemless freshwater aquatic plants; widely distributed

American frogbit, Limnodium spongia - American plant with roundish heart-shaped or kidney-shaped leaves; usually rooted in muddy bottoms of ponds and ditches