The anthers are shorter or as long as half of the filament.

[1] The margin of the stigmatic disk is lobed, or rarely entire.

[1] The autonymous section was created when Donald Jay Padgett described Nuphar sect.

[1] It occurs in Eurasia,[1] and North America, where only one species, Nuphar microphylla, is present.

[3][1] The section originated and diversified in Eastern Asia.