Tyrbastes glaucescens B.G.Briggs & L.A.S.Johnson
Telopea 7:366-367,Figs7b,c (1998)

Conservation Code: Not threatened
Naturalised Status: Native to Western Australia
Name Status: Current

Brief Description
Helen Coleman, Friday 9 October 1998

Rhizomatous, tufted perennial, herb (sedge-like), 0.25-1.4 m high, culms 1-1.5 mm diam. at base; female spikelets 1-3-flowered, glumes scarcely overlapping; tepals 6. Sand or peat. Swamps and along stream banks.

Distribution

Beard’s Provinces: South-West Province.

IBRA Regions: Esperance Plains, Jarrah Forest, Swan Coastal Plain, Warren.

IBRA Subregions: Fitzgerald, Perth, Southern Jarrah Forest, Warren.

Local Government Areas (LGAs): Albany, Augusta-Margaret River, Bridgetown-Greenbushes, Busselton, Collie, Denmark, Manjimup, Nannup.

Scientific Description
Chris Hollister and Kevin Thiele, Friday 1 September 2017

Rhizomes tufted, glabrous. Basal sheath glabrous, dull, striate. Culms terete, internal structure (at base of culm) hollow in upper part, glabrous, striate, not marbled, not fasciculate. Culm 450-1270 mm long. Sheaths (including blade) appressed throughout, dull, striate, glabrous, margins not translucent. Apex elongated, glabrous. Dioecious (with separate male and female plants). Male and female inflorescences distinctly dissimilar, posture (male inflorescences only) More or less erect, Culms unbranched below the inflorescence. Male spikelet 4-6.5 mm long. Subtending bract glabrous, Outer bract 5-5.4 mm long, margins firm and opaque, Apex acuminate to attenuate. Perianth glabrous. 2.5-3.5 mm long. Inner bract glabrous, margins firm and opaque, Apex acuminate to attenuate. Inner bract 3-3.3 mm long. Filament 1.6-2.8 mm long. Anther 1.4-1.8 mm long. Female spikelet 8.8-11.5 mm long. Subtending bract glabrous, margins firm and opaque, Apex acuminate to attenuate. Outer bract 5.2-9 mm long. Perianth glabrous. 4.6-8.5 mm long. Inner bracts 6.8-7.2 mm long, glabrous, margins firm and opaque, Apex acuminate to attenuate. Style two (or two-branched). 7.3-8.5 mm long. Fruit bilocular (capsule). Botanical Province South-West, IBRA Bioregions Swan Coastal Plain, Jarrah Forest, Warren or Esperance.