Plants 15-40 cm tall. Stem erect, terete, branched mostly from upper-middle part; branches slender, 10-35 cm. Leaves linear, 3.5-4.5 cm × ca. 1 mm, 1-veined, base attenuate, margin entire, apex acuminate, mucronate. Spikelike inflorescence slender, loose; bracts linear-lanceolate to lanceolate, 0.6-3.5 cm × 1-2 mm, narrower than utricle, apex acuminate, mucronate. Perianth segment 1, broadly elliptic, 0.9-1.2 × ca. 0.6 mm. Stamens 1-3; filaments longer than perianth segments. Utricle suborbicular, 4.5-5.5 × 4-5 mm, glabrous, subglabrous, or covered with stellate hairs, base cordate, apex deeply emarginate; wing equaling or slightly wider than body, margin irregularly denticulate; beak 1.5-1.7 mm, apex ca. 1/4 as long as beak, recurved. Fl. and fr. Aug-Sep.
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