Plants perennial, cespitose, 30–120 cm; rhizomes absent. Culms arching, leafy, drooping tipped, ± terete, ribbed, slender. Principal leaves exceeded by culm; blades spreading to ascending, narrowly linear, proximally flat, 2–3.5 mm wide, apex trigonous, tapering. Inflorescences: clusters of spikelets 3–6, progressively wider-spaced proximally, narrow, elongate; leafy bracts slender, mostly exceeding clusters. Spikelets red brown, lanceoloid, 5–7 mm, apex acuminate; fertile scales narrowly ovate, 4–5 mm, apex acuminate, midrib included or short excurrent. Flowers: perianth bristles 6, exceeding tubercle, antrorsely barbellate. Fruits (1–)2–3(–4) per spikelet, 3–3.2 mm; body brown, narrowly oblong-ellipsoid, flattened, 2 × 0.8–1 mm; surface strongly transversely wavy rugose, vertically finely striate between ridges; tubercle compressed, narrowly triangular-subulate, 1 mm.
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Vahl Cespitose, to 1 m; lvs flat, 2–5 mm wide; infl of 2–6 loosely branched elongate cymes on filiform peduncles; spikelets lanceolate, 4–6 mm, castaneous, with 2–5 fls and 1–4 frs; bristles 6, stiffly erect, antrorsely barbellate, surpassing the tubercle; achenes flat, brown, narrowly elliptic-obovate, 1.7–2.1 mm, half as wide; transversely strongly ridged; tubercle flat, 0.7–1 mm. Moist acid soil on the coastal plain or occasionally inland; se. Va. to Ga. and Tex.
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