Rhizomatous, perennial, herb (sedge-like), 0.45-1 m high. Fl. Sep to Nov. Sand & peat. Swamps, roadsides.
Beard’s Provinces: South-West Province.
IBRA Regions: Avon Wheatbelt, Esperance Plains, Jarrah Forest, Swan Coastal Plain, Warren.
IBRA Subregions: Avon Wheatbelt P2, Fitzgerald, Northern Jarrah Forest, Perth, Recherche, Southern Jarrah Forest, Warren.
IMCRA Regions: WA South Coast.
Local Government Areas (LGAs): Albany, Armadale, Augusta-Margaret River, Bayswater, Beverley, Bridgetown-Greenbushes, Busselton, Capel, Collie, Cranbrook, Dardanup, Denmark, Donnybrook-Balingup, Esperance, Gingin, Harvey, Kwinana, Manjimup, Melville, Mundaring, Nannup, Perth, Plantagenet, Serpentine-Jarrahdale, Stirling, Swan, Wanneroo, Waroona, West Arthur.
Rhizomes spreading, glabrous. Basal sheath glabrous, dull, striate. Culms terete, internal structure (at base of culm) hollow, glabrous, not striate, not marbled, not fasciculate. Culm 220-720 mm long. Sheaths (including blade) appressed throughout, dull, not striate, glabrous, margins not translucent. Apex finely pointed or elongated, 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 2.7-4 mm long. Subtending bract glabrous, Outer bract 1.7-2 mm long, margins thin and translucent, Apex acute. Perianth glabrous. 2-2.5 mm long. Inner bract glabrous, margins firm and opaque, Apex acute. Inner bract 1.8-2.2 mm long. Filament 1.2-1.5 mm long. Anther 1-1.4 mm long. Female spikelet 2.3-2.7 mm long. Subtending bract glabrous, margins firm and opaque, Apex acute. Outer bract 1.5-2 mm long. Perianth glabrous. 2-2.5 mm long. Inner bracts 2-2.4 mm long, glabrous, margins firm and opaque, Apex acute. Style three (or three-branched). 2-3 mm long. Fruit trilocular (capsule). Flowering Time September, October or November. Botanical Province South-West, IBRA Bioregions Swan Coastal Plain, Avon Wheatbelt, Jarrah Forest, Warren or Esperance.
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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/