Nuphar Sm.
Rhizomatous. Lvs floating or emergent, entire, deeply cordate, exstipulate, green to dark purple beneath, with forking, non-anastomosing lateral veins. Sepals usually 6, yellowish green outside, yellow within. Petals numerous, yellowish, < sepals. Ovary superior. Seeds without aril.
25 spp., temperate regions. Naturalised sp. 1.
