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

family Potamogetonaceae, pondweed family, Potamogetonaceae - plants that grow in ponds and slow streams; sometimes includes family Zosteraceae

curled pondweed, curleyleaf pondweed, Potamogeton crispus - European herb naturalized in the eastern United States and California

Potamogeton gramineous, variously-leaved pondweed - of Europe (except the Mediterranean area) and the northern United States

loddon pondweed, Potamogeton americanus, Potamogeton nodosus - pondweed with floating leaves; of northern United States and Europe