Plants perennial, cespitose, 70–100(–150) cm; rhizomes absent. Culms erect to ascending, leafiest at base, triangular, slender, somewhat stiff. Leaves exceeded by culm; basal blades crowded, spreading excurved, distal ascending, linear, proximally flat, 3–5 mm wide, apex trigonous, short subulate. Inflorescences: spikelet clusters 3–5, compact, the proximalmost widely spaced, turbinate or lobed to hemispheric; leafy bracts setaceous, mostly overtopping clusters. Spikelets red brown, broadly ovoid, 3–3.5(–4) mm, apex acuminate; fertile scales broadly ovate to ± orbiculate, 2–2.5(–3) mm, apex rounded to notched, midrib included or short excurrent. Flowers: perianth bristles 6, reaching from fruit midbody to tubercle, antrorsely barbellate. Fruits 1–2 per spikelet, (2–)2.5–2.8(–3) mm; body brownish, broadly obovoid to nearly orbicular, 1.5–2 × 1.5–2 mm; surfaces strongly transversely wavy rugose, intervals rows of vertical, rectangular alveolae; tubercle conic-subulate, basal rim flaring above short neck on achene.
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