Plants perennial, cespitose, 60–80 cm; rhizomes absent. Culms erect or ascending, leafy, trigonous, slender. Leaves all exceeded by culm; basal blades spreading, often curled, distal longer, all proximally flat, 3–5 mm wide, apex trigonous, subulately tapering. Inflorescences: clusters 3–5, proximalmost distant, longest pedunculate, fascicles broadly turbinate to hemispheric; leafy bracts of distal groups mostly exceeded by inflorescence. Spikelets lance ovoid, (3.5–)4–5 mm; fertile scales broadly ovate to ± orbiculate, cupulate, rounded, 3 mm, apex apiculate to cuspidate, midrib excurrent. Flowers: perianth bristles 6, overtopping tubercle (or at least its base), antrorsely barbellate. Fruits 1–3 per spikelet, 2.3–3 mm; body brown, strongly compressed proximally, biconvex distally, broadly obovoid, 1.8–2.2 × 1.5 mm; surfaces strongly transversely rugose, intervals with rows of narrow, vertical alveolae; tubercle triangular, flat, 1 mm, base lunate, capping fruit apex, apiculate.
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