Isolepis congrua Nees

in Lehm., Pl. Preiss. 2: 75 (1846) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: vulnerable (v); listed in Flora and Fauna Guarantee Act 1988

Small tufted annual. Culms filiform, to 20 cm high. Leaf-blades to 9 cm long. Spikelets 1–5 per inflorescence, 3–5 mm long; involucral bract erect to spreading, exceeding inflorescence, to 15 mm long; glumes acute, with straight or excurved mucro, sides nerveless or 1-nerved at edge of keel, hyaline, often tinged yellow to red-brown, mostly 1.5–2.0 mm long; stamen 1; style 3-fid. Nut equally triquetrous, broad-ellipsoid to broad-obovoid, minutely punctate (often whitish), glistening, dark red-brown to dark grey, from one-third to one-half as long as glume, 0.4–0.7 mm long, c. 0.4 mm diam. Flowers spring.

CVU, Gold, GGr, LoM, NIS, RobP, VRiv, Wim. Also WA, NT, SA, NSW. Apparently rare in Victoria, but possibly overlooked, recorded from cracking grey clay along the Murray River near Colignan and other seasonally wet areas at Mt Arapiles, near Donald, St Arnaud, Dadswells Bridge, Puckapunyal, and Mt Pilot.

Close to Isolepis australiensis and I. victoriensis, differing in the broader hyaline sides of the glumes (0.4–0.6 mm wide), which have larger cell outlines. The glumes are usually longer, and the nut is broad-ellipsoid to broad-obovoid, with faces slightly concave and angles acute, prominent.

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, 2017-11-13
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Poales
family Cyperaceae
genus Isolepis
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Isolepis congrua in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Isolepis congrua in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Lowan Mallee present native
Wimmera present native
Victorian Riverina present native
Robinvale Plains present native
Goldfields present native
Central Victorian Uplands present native
Greater Grampians present native
Northern Inland Slopes present native

State distribution

Distribution map
Western Australia
Northern Territory
South Australia
New South Wales