Perennial herbs, rooted in water, totally submersed or with floating leaves; leaves alternate, simple, filiform to elliptic and parallel-veined, stipulate; flowers bisexual, regular, in axillary spikes; fruit an aggregate of achenes.
Seed Type:
Angiosperm
Origin:
Native: native to North America. Non-native: not native to North America. Introduced Native: native to North America, but not Rowe Woods.
* Definitions based on the USDA terminology