Myriophyllum L. >
Aquatic plants or growing on mud. Petals absent in female flowers Myriophyllum
All leaves alternate. Emergent leaves linear to lanceolate, sometimes pinnatisect, usually less than 10 mm long. Flowers solitary, ± sessile. Male petals cream, c. 2 mm long
Leaves entire or shortly toothed. Mericarps densely papillose. Widespread. Usually in swamps but sometimes in still water Myriophyllum gracilelineare