Scirpus chen-moui Tang & F. T. Wang, Fl. Reipubl. Popularis Sin. 11: 223. 1961 ["chen-mouii"].
Roots fibrous. Culms 10-30 cm tall, ca. 1.5 mm thick, terete, smooth, clothed at base with 2-4 green to pale brown leaf sheaths. Leaf sheaths 1-10 cm, mouth obliquely truncate and sometimes with a setaceous ca. 1 cm blade. Involucral bract 1, erect, culmlike, 10-20 cm, subterete, smooth, base slightly dilated, margin membranous. Inflorescence a pseudolateral head, with 2-10 spikelets. Spikelets oblong-ovoid to oblong, 5-10 × ca. 3 mm, many flowered. Glumes yellow with brown lines, obovate to oblong, membranous, margin ciliolate, apex with a green costa excurrent into a mucro. Perianth bristles (5 or)6, longer than nutlet, retrorsely scabrous. Stamens 3; anthers oblong, short; connective apex slightly evident beyond anthers. Style of medium length; stigmas 3. Nutlet yellow when young but turning black at maturity, obovoid to broadly obovoid, 1-1.2 mm, 3-sided, transversely wrinkled. Fl. and fr. Aug-Oct.