4 gen., cosmop., brackish water or marine plants

Zannichellia L.

1 species native Aust.; NSW, S.A.

Zannichellia palustris L.

Monoecious, submerged herb in brackish water. Leaves linear, up to 5 cm long, with a basal stipular sheath; distal leaves apparently in whorls of 3. Roots single or paired at the nodes of the rhizome. Flowers unisexual, usually 1 male and 1 female at each leaf whorl; male flowers with a single stamen; female flowers usually with 4--5 carpels surrounded by a sheath; stigma funnel-shaped. Fruit an achene. Ash Island, Hunter River. Fl. summer