Native yearlong-green perennial large densely-tufted sedge. Stems are 3-angled, yellow-green and to 1 m tall. Leaves are strap-like and rough edged. Flowerheads are yellow-brown, narrow, erect, spike-like panicles to 40 cm long. Flowering is from late winter to summer. Found in areas that are damp or wet to a shallow depth for long periods (e.g. drains, stream banks and swamp margins). Native biodiversity. It performs a useful role in preventing erosion in drainage lines. Can form dense stands, which provide shelter for native animals, but also feral animals. Can be controlled with herbicides, but old growth