Rhizomatous, perennial, herb, 0.2-0.9 m high. Fl. Sep to Oct or Feb to Mar. Grey/peaty sand, clay. Winter-wet flats, wetland fringes.
Beard’s Provinces: South-West Province.
IBRA Regions: Geraldton Sandplains, Jarrah Forest, Swan Coastal Plain.
IBRA Subregions: Dandaragan Plateau, Lesueur Sandplain, Northern Jarrah Forest, Perth.
Local Government Areas (LGAs): Armadale, Bayswater, Chittering, Cockburn, Dandaragan, Gingin, Gosnells, Harvey, Kalamunda, Kwinana, Perth, Serpentine-Jarrahdale, Swan, Victoria Park, Wandering, Wanneroo.
Rhizomes spreading, hairy. Basal sheath glabrous, dull, striate. Culms terete, internal structure (at base of culm) hollow, glabrous, striate, not marbled, not fasciculate. Culm 150-790 mm long. Sheaths (including blade) appressed throughout, dull, striate, glabrous, margins translucent. Apex finely pointed, glabrous. Dioecious (with separate male and female plants). Male and female inflorescences similar, posture (male inflorescences only) More or less erect, Culms unbranched below the inflorescence. Male spikelet 9-20 mm long. Subtending bract glabrous, Outer bract 2.8-3 mm long, margins thin and translucent, Apex acute. Perianth glabrous. 1.5-3 mm long. Inner bract glabrous, margins thin and translucent, Apex acute. Inner bract 2.6-3.8 mm long. Filament 1.5-2.5 mm long. Anther 0.7-1.2 mm long. Female spikelet 7-16 mm long. Subtending bract glabrous, margins thin and translucent, Apex acute. Outer bract 3.5-4 mm long. Perianth glabrous. 2-2.5 mm long. Inner bracts 3-3.5 mm long, glabrous, margins thin and translucent, Apex acute. Style two (or two-branched). 2.8-2.9 mm long. Fruit bilocular (capsule). Flowering Time February, March, September or October. Botanical Province South-West, IBRA Bioregions Geraldton Sandplain, Swan Coastal Plain or Jarrah Forest.
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Western Australian Herbarium (1998–). FloraBase—the Western Australian Flora. Department of Biodiversity, Conservation and Attractions. https://florabase.dpaw.wa.gov.au/