About Gahnia filum (Labill.) F.Muell.
Gahnia filum, commonly known as chaffy saw-sedge, is a tussock-forming perennial plant in the family Cyperaceae. It is endemic to Australia, and grows between 60 and 110 centimetres in height. This species grows in coastal salt marshes, and is found in the Australian states of New South Wales, Victoria, Tasmania and South Australia. Caterpillars of the yellow sedge-skipper butterfly use Gahnia filum for shelter during daylight, binding the plant's leaves together with silk, and feed on the leaves at night. This species is currently being planted at Aldinga Washpool in South Australia to provide habitat for the endangered yellow sedge-skipper butterfly.
