Terrestrial or semi-aquatic.
Leaves opposite, the upper ones semi-opposite to alternate;
Flowers solitary in the upper leaf-axils, the upper ♂, the lower ♀.
Fruit c. 1 mm long.
Asia-Tropical, E. New Guinea present, Papua present, Western Distr present, near Weam present
Malesia: E. New Guinea (Papua, Western Distr.: near Weam). .