Javanese flatsedge (Cyperus javanicus) is a sedge of the family Cyperaceae that is native to Indonesia and Australia. Javanese flatsedge (Cyperus javanicus) sedge typically grows to a height of 0.6 to 1.2 metres (2.0 to 3.9 ft) and has a tufted habit. The culms are obtusely trigonous and densely papillose. The leaves are long and flat on top while folded at the base and around 2 to 13 millimetres (0.08 to 0.51 in) in width. The compound inflorescences have between six and twelve primary rays which are up to 8 cm 8 centimetres (3.1 in) in length.