Hypolaena viridis B.G.Briggs & L.A.S.Johnson

Telopea 10:575-576,Figs 2E-G (2004)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status

Dioecious rhizomatous, dense perennial, herb, 0.25-0.45 m high. Grey or peaty sand, sandy clay. Swampy sites, creek & stream banks.

Amanda Spooner, Descriptive Catalogue, 12 September 1997

Scientific Description

Rhizomes spreading, hairy. Basal sheath glabrous, dull, striate. Culms terete, internal structure (at base of culm) solid, glabrous, striate, not marbled, not fasciculate. Culm 260-540 mm long. Sheaths (including blade) appressed throughout, dull, striate, glabrous, margins not translucent. Apex elongated, hairy. Dioecious (with separate male and female plants). Male and female inflorescences distinctly dissimilar, posture (male inflorescences only) Distinctly drooping, Culms unbranched below the inflorescence. Subtending bract Apex acute (?), acuminate to attenuate (?) or obtuse (?). Female spikelet 10-16 mm long. Subtending bract glabrous, margins thin and translucent, Apex obtuse. Outer bract 8-10.5 mm long. Perianth glabrous. 11-14 mm long. Inner bracts 12-14 mm long, glabrous, margins thin and translucent, Apex obtuse. Style one, arising centrally from the ovary apex. 10-12 mm long. Fruit indehiscent (nut). Flowering Time August, September or October. Botanical Province South-West, IBRA Bioregions Swan Coastal Plain, Avon Wheatbelt, Jarrah Forest or Warren.

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


IBRA Regions
Avon Wheatbelt, Jarrah Forest, Swan Coastal Plain, Warren.
IBRA Subregions
Katanning, Perth, Southern Jarrah Forest, Warren.
Local Government Areas (LGAs)
Augusta Margaret River, Busselton, Harvey, Manjimup, Nannup, Wagin.