Baumea arthrophylla (Nees) Boeck.

Linnaea 36: 242 (1874) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Perennial with long rhizome. Culms rigid, terete or compressed, 1-noded, striate, glabrous, smooth, 30–130 cm high, 0.8–2.5(–5) mm diam. Leaves basal and cauline; basal blades terete, more or less transversely septate (not obvious externally when fresh), to 1.5(–8) mm diam., shorter than culms; cauline leaves much reduced; sheath reddish or straw-coloured, dull. Inflorescence interrupted-oblong in outline, narrow, erect, 8–55 cm long, 1.5–3 cm diam.; lowest involucral bract much shorter than inflorescence. Spikelets numerous, 2–4-flowered, 3.5–5.5 mm long; glumes 4 or 5, acute, with excurved mucro, mid to dark red-brown, margins ciliate; fertile glumes 3.0–4.5 mm long. Nut ellipsoid to ovoid, 3-angled, smooth with underlying reticulations, white-hispid at apex, ± shining, pale straw-coloured to whitish, 1.8–2.5 mm long, 0.9–1.3 mm diam. Flowers spring–summer.

Brid, CVU, DunT, EGL, EGU, GipP, Glep, GGr, HNF, HSF, LoM, MuM, OtP, VVP, WaP, WPro, Wim. All States. New Zealand. In freshwater swamps and lakes, sometimes growing in water to c. 1 m deep.

Commonly confused with B. rubiginosa, which has larger, less angular nuts, leaves and involucral bracts somewhat flattened at least near the apex, and more densely clustered spikelets.

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.
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 arthrophylla in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Baumea arthrophylla in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Murray Mallee present native
Wimmera present native
Glenelg Plain present native
Bridgewater present native
Victorian Volcanic Plain present native
Gippsland Plain present native
Otway Plain present native
Warrnambool Plain present native
Central Victorian Uplands present native
Greater Grampians present native
Dundas Tablelands present native
East Gippsland Lowlands present native
East Gippsland Uplands present native
Wilsons Promontory present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native

State distribution

Distribution map
Western Australia
Northern Territory
South Australia
New South Wales
Australian Capital Territory