Lepidobolus chaetocephalus Benth. Bristle-headed Chaff Rush
Fl.Austral. 7: 245 (1878)

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

Brief Description
Grazyna Paczkowska, Thursday 11 August 1994

Rhizomatous, caespitose perennial, herb (sedge-like), 0.18-0.7 m high. White, grey or yellow sand. Dry kwongan.

Distribution

Beard’s Provinces: Eremaean Province, South-West Province.

IBRA Regions: Avon Wheatbelt, Coolgardie, Esperance Plains, Geraldton Sandplains, Jarrah Forest, Mallee, Swan Coastal Plain, Yalgoo.

IBRA Subregions: Avon Wheatbelt P1, Avon Wheatbelt P2, Dandaragan Plateau, Eastern Goldfield, Eastern Mallee, Edel, Fitzgerald, Geraldton Hills, Lesueur Sandplain, Northern Jarrah Forest, Perth, Recherche, Southern Cross, Western Mallee.

Local Government Areas (LGAs): Albany, Beverley, Bruce Rock, Carnamah, Coolgardie, Coorow, Corrigin, Cranbrook, Cuballing, Cunderdin, Dandaragan, Dumbleyung, Dundas, Esperance, Gingin, Gnowangerup, Goomalling, Irwin, Jerramungup, Kent, Kondinin, Kulin, Lake Grace, Mingenew, Moora, Narrogin, Northampton, Pingelly, Quairading, Ravensthorpe, Shark Bay, Tammin, Three Springs, Victoria Plains, West Arthur, Wickepin.

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

Rhizomes spreading, hairy. Basal sheath glabrous, dull, not striate. Culms terete, internal structure (at base of culm) hollow, glabrous, striate or not striate, not marbled, not fasciculate. Culm 160-390 mm long. Sheaths (including blade) spreading, dull, not 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 10-15 mm long. Subtending bract hairy, Outer bract 6-8.5 mm long, margins thin and translucent, Apex acute. Perianth glabrous. 3-5 mm long. Inner bract hairy, margins thin and translucent, Apex acute. Inner bract 6-8.5 mm long. Filament 3.2-5.5 mm long. Anther 1.6-2 mm long. Female spikelet 8-10 mm long. Subtending bract glabrous, margins firm and opaque, Apex acuminate to attenuate. Outer bract 6.3-8.5 mm long. Perianth glabrous. 7-8.5 mm long. Inner bracts 7.5-9 mm long, glabrous, margins thin and translucent, Apex acuminate to attenuate. Style one, arising centrally from the ovary apex. 7-8 mm long. Fruit indehiscent (nut). Flowering Time August, September, October or November. Botanical Province Eremaeam or South-West, IBRA Bioregions Yalgoo, Coolgardie, Geraldton Sandplain, Swan Coastal Plain, Jarrah Forest or Esperance.