Description from Flora of China
Plants 7-10 cm tall. Stem erect, few branched. Leaves linear, 1.5-3 cm × ca. 1 mm, 1-veined, sparsely covered with stellate hairs, base attenuate, apex acute, mucronate. Inflorescence spikelike, elongate, loose; bracts linear-lanceolate to ovate, 0.5-2 cm × 2-3 mm. Perianth segment 1, broadly elliptic, apex irregularly denticulate. Stamens 1(or 3), ca. 1.5 × as long as perianth segment. Utricle oblong-elliptic, 4-5 × 2.5-3.5 mm, densely stellate hairy, base truncate or subcordate, apex acute; wing usually ca. 1/2 as wide as body, slightly crisped, margin irregularly denticulate; beak ca. 1 mm, apex 1/4-1/3 as long as beak. Fl. and fr. May-Jun.
Judging from its elongate fruit body, this little-known species seems to be closely related to C. tylocarpum. However, the unusually broad wing makes its affiliation with that species doubtful.
* Dunes. NE Henan (Fengqiu, Kaifeng).