''Gahnia filum'', the chaffy saw-sedge, is a

tussock Tussock may refer to: * Tussock grass, a group of species in the family Poaceae *Floating island * Lymantriinae, called tussock moths or tussocks See also * Hassock (disambiguation) Hassock may refer to: * Kneeler, a cushion or a piece of f ...

-forming perennial in the family

Cyperaceae The Cyperaceae are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large, with some 5,500 known species described in about 90 genera, the largest being the "true sedges" genus '' Carex'' ...

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

to Australia. It grows to between 60 and 110 cm in height. The species occurs in coastal

salt marsh A salt marsh or saltmarsh, also known as a coastal salt marsh or a tidal marsh, is a coastal ecosystem in the upper coastal intertidal zone between land and open saltwater or brackish water that is regularly flooded by the tides. It is domin ...

in the states of

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

, Victoria,

Tasmania ) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Location of Tasmania in AustraliaCoordinates: , subdivision_type = Country , subdi ...

and

South Australia South Australia (commonly abbreviated as SA) is a state in the southern central part of Australia. It covers some of the most arid parts of the country. With a total land area of , it is the fourth-largest of Australia's states and territories ...

. The caterpillar of the

yellow sedge-skipper ''Hesperilla flavescens'', also known as the yellow sedge-skipper or yellowish skipper, is a species of butterfly in the family Hesperiidae. It is found in the Australian states of South Australia and Victoria. The wingspan is about . The la ...

butterfly uses this species for shelter during daylight hours, binding the leaves with silk. By night it feeds on the grass. ''Ghania'' is being planted at

Aldinga Washpool __NOTOC__ Aldinga Beach is an outer southern suburb of Adelaide, South Australia. It lies within the City of Onkaparinga and has the postcode 5173. At the , Aldinga Beach had a population of 10,557. It lies about a kilometre west of the smalle ...

in South Australia in order to provided habitat for the endangered butterfly.

References

filum The filum terminale ("terminal thread") is a delicate strand of fibrous tissue, about 20 cm in length, proceeding downward from the apex of the conus medullaris. It is one of the modifications of pia mater. It gives longitudinal support to ...

Flora of New South Wales Flora of South Australia Flora of Tasmania Flora of Victoria (Australia) Poales of Australia Plants described in 1805 Taxa named by Jacques Labillardière {{Australia-plant-stub