Plants 5.5–11.5 cm high, many cm long, with prop roots to 30 cm long. Culm internodes 0.75–1 mm long. Leaves: sheath c. 4 mm long, 7–9-nerved, glabrous, scaberulous on the margins; ligule a fringe of hairs, 0.2–0.5 mm long; blade 15–33 mm long (including pungent apical spine of c. 0.5 mm), 1.5–2 mm wide, long-acuminate, coriaceous, 7–10-nerved, glabrous, spiny-scabrid on margins. Panicle prominently exserted, 15–25 mm long, 7–15 mm wide, with flat black-red glands on divisions. Glumes longer than florets, ovate-oblong, c. 1 mm long, subacute to obtuse or truncate, entire or denticulate, muticous or mucronulate, 1-nerved. Lemma ovate, 0.5–0.8 mm long, obtuse, membranous, with 1–3 ribbed nerves. Palea nerveless. Caryopsis almost spherical, c. 0.5 mm long, reticulate.
Grows in depressions, seepage, damp drainage flats, rock ledges,crevices and gorges in shallow, sandy-loam soils with extensive sandstone pavement.
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