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Dielsia stenostachya (W.Fitzg.) B.G.Briggs & L.A.S.Johnson

Telopea 8:27 (1998)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status

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.

Amanda Spooner, Descriptive Catalogue, 22 October 1997

Scientific Description

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.

C. Hollister and K.R. Thiele, 1 September 2017


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.