Leptocarpus tenax (Labill.) R.Br. Slender Twine Rush
Prodr.Fl.Nov.Holland. 250 (1810)

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

Brief Description
Grazyna Paczkowska, Thursday 11 August 1994

Rhizomatous, perennial, herb (rush-like), 0.4-1 m high. Fl. brown/red, Nov to Dec or Jan. White, grey or black sand, clay. Swamps.


Beard’s Provinces: South-West Province.

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

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

IMCRA Regions: WA South Coast.

Local Government Areas (LGAs): Albany, Augusta Margaret River, Boddington, Bridgetown-Greenbushes, Busselton, Capel, Cranbrook, Denmark, Donnybrook-Balingup, Harvey, Jerramungup, Manjimup, Nannup, Plantagenet.

Scientific Description
C. Hollister and K.R. Thiele, Friday 1 September 2017

Rhizomes spreading, glabrous. Basal sheath glabrous, glossy, striate. Culms terete, internal structure (at base of culm) hollow, glabrous, not striate, marbled, not fasciculate. Culm 380-950 mm long. Sheaths (including blade) appressed throughout, dull, striate, glabrous, margins translucent. Apex elongated, glabrous. Dioecious (with separate male and female plants). Male and female inflorescences distinctly dissimilar, posture (male inflorescences only) Distinctly drooping, Culms unbranched below the inflorescence. Male spikelet 3-4.2 mm long. Subtending bract glabrous, Outer bract 2-2.7 mm long, margins firm and opaque, Apex acute. Perianth glabrous. 1.8-2.4 mm long. Inner bract glabrous, margins thin and translucent, Apex acute. Inner bract 2.5-3 mm long. Filament 0-0.1 mm long. Anther 0.8-1 mm long. Female spikelet 10-20 mm long. Subtending bract glabrous, margins thin and translucent, Apex acute. Outer bract 7-8 mm long. Perianth glabrous. 3.5-6 mm long. Inner bracts 6-9 mm long, glabrous, margins thin and translucent, Apex acute. Style one, arising centrally from the ovary apex. 4.5-7 mm long. Fruit indehiscent (nut). Flowering Time January, November or December. Botanical Province South-West, IBRA Bioregions Swan Coastal Plain, Jarrah Forest, Warren or Esperance.