Isolepis congrua
NeesSmall 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.
LoM, Wim, MSB, RobP, MuF, Gold, CVU, GGr, NIS. 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.
Wilson, K.L. (1994). Cyperaceae. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons, pp. 238–356. Inkata Press, Melbourne.
Spinning
