Cyperus ustulatus is a plant of damper areas, often found by rivers near the coast, and it is distributed through much of the country apart from the southern South Island. It is very vigorous, growing into a clump 60cm -1m tall, with deep olive-green, very sharp-edged leaves. The flowering stems are up to 1.2m or more, with a ruff of leafy bracts below the spikelets. A useful plant for revegetation in wet areas but it is generally considered too vigorous for most garden situations. Propagation by seed or division.