Cyperus is a large genus of about 600 species of sedges, distributed throughout all continents in both tropical and temperate regions. They're annual or perennial plants, mostly aquatic and growing in still or slow-moving water up to 50cm deep. Common names include papyrus sedges, umbrella-sedges and galingales.  Cyperus helferi        Cyperus species are widespread all over the tropics, but only a few of them are good underwater plants. Cyperus helferi is the first Cyperus species Read more