Conostylis prolifera, commonly known as mat cottonheads,[2] is a rhizomatous, tufted, stoloniferous, perennial, grass-like plant or herb in the family Haemodoraceae and is endemic to the south-west of Western Australia.

It has flat, glabrous leaves, and yellow and cream-coloured, tubular flowers.

[2][3][4] Conostylis prolifera was first formally described in 1873 by George Bentham in Flora Australiensis.

[7] This conostylis grows in loam and sand in winter-wet flats between the lower Murchison River, Beverley, Tammin and Wickepin in the Avon Wheatbelt, Geraldton Sandplains, Jarrah Forest, Swan Coastal Plain and Yalgoo bioregions of south-western Western Australia.

[2][4] Conostylis prolifera is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.