Nak., Vallisneriaceae Dum. Habit and leaf form . Vegetatively diverse aquatic herbs . Leaves submerged, or emergent, or floating, or submerged and emergent, or submerged and floating. Leaf sheaths with free margins.
Leaves stipulate, or exstipulate.
Leaves with a persistent basal meristem, and basipetal development . General anatomy . Accumulated starch other than exclusively 'pteridophyte type'. Leaf anatomy . Lamina without secretory cavities.