Aquatic plants. Corolla yellow or white Menyanthaceae
Leaves floating or plant prostrate on mud Nymphoides
Corolla yellow
Corolla lobes crested along the middle to a broad fringed membrane, fringed on the margins and bearded inside at the base with a few long hairs. Leaves crenate, glandular-dotted underneath. Uncommon. Coast and adjacent plateaus. Ponds and margins of rivers. Fl. spring–autumn Nymphoides crenata
Corolla lobes without a crested membrane along the middle. Leaves entire or very slightly crenate