Botany: aquatic, wetland; 5 genera, 60-70 species; simple or compound leaves arise alternately from a creeping rhizome; inflorescence erect; flowers sympetalous, insect-pollinated; yellow or white; petals are ciliate or adorned with lateral wings; fruit is a capsule.
Genera: Liparophyllum, Menyanthes, Nephrophyllidium (deer cabbage), Nymphoides (floating heart, water snowflake), Villarsia.
Menyanthaceae have been placed in Gentianales in the past. The Apg3 classification has placed it in Campanulales.
The Campanulales are in Phase 3. Menyanthaceae is in Subphase 1, being mostly aquatics.