Chorizandra australis

Perennial with tough rhizome. Culms 90–220 cm high, 4–9 mm diam., unitubular, sometimes pluritubular near base, transverse septa occasionally obvious externally near apex, yellow-green, longitudinally striate but not warty. Inner leaf-blades much shorter and more slender than culms, unitubular; sheaths loose, pale brown to purplish, to 38 cm long. Inflorescence globose to hemispherical, 10–18 mm diam., with numerous pseudospikelets; core globose to hemispherical. Involucral bract to 20 cm long, unitubular; base hyaline to yellow-chartaceous, not or occasionally slightly red-dotted, not enlarged or sheathing inflorescence. Pseudospikelets with 14–16 glumes, 8–13 stamens; glumes spathulate to ligulate, mostly ± keeled near apex, ± erose, dark red-brown towards apex, glabrous, 5.0–6.0 mm long; apex acute to obtuse, rather praemorse. Nut with 6–8 complete longitudinal ridges and fainter secondary longitudinal and transverse ridges, pale red-brown to grey-brown, 3–4.5 mm long, 2.0–2.7 mm diam. Flowers spring–summer.