Baumea laxa (Nees) Boeck.

Lax Twig-rush

Linnaea 38: 245 (1874) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: rare (r)

Slender tufted perennial with short rhizome. Culms rigid, subterete to biconvex, nodeless, striate, glabrous, smooth, 20–55 cm high, 1–2 mm diam. Leaves basal; blade flattened, shorter and broader than culms, to 2.5(–4.5) mm wide; sheath straw-coloured, dull. Inflorescence oblong in outline, loose, with distant drooping branches to c. 20 cm long, 15–30 cm long, 1–2.5 cm diam.; lowest involucral bract much shorter than inflorescence. Spikelets rather few, 3–5-flowered, 4–5 mm long; glumes 4 or 5, acute, red-brown, smooth or minutely scabrous, margins with scattered cilia; fertile glumes 2.5–4.5 mm long. Nut obovoid, coarsely reticulate, strongly 3-ribbed, the ribs somewhat winged, smooth between the ribs, white-hispid at very apex, ± shining, straw-coloured to red-brown, 1.8–3.0 mm long, c. 1 mm diam. Flowers spring.

Brid, GipP, Glep, VVP, WaP, WPro. Also WA, SA. Rare, confined to a few sites in the south-west (Portland-Nelson area, Port Campbell National Park) and the northern part of Wilsons Promontory. Occurs in wet sandy areas in heathlands and heathy swamps.

Close to, and perhaps better treated as a subspecies of, B. preissii Nees from Western Australia.

Source: Wilson, K.L. (1994). Cyperaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2018-06-20
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Cyperaceae
genus Baumea
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Baumea laxa in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Baumea laxa in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Glenelg Plain present native
Bridgewater present native
Victorian Volcanic Plain present native
Gippsland Plain present native
Warrnambool Plain present native
Wilsons Promontory present native

State distribution

Distribution map
Western Australia
South Australia