Annuals, without a rhizome. Culms 5-30 cm tall, ca. 0.7 mm thick, subterete, smooth. Leaves basal; sheath tubular, 1.5-2.5 cm, membranous, glabrous, basal ones without a blade, apical ones with a blade; leaf blade linear, 1-7 cm × 0.6-1 mm, papery, both surfaces glabrous, midvein obsolete, margin involute. Involucral bract 1, leaflike, dilated at base. Spikes 1 or 2, ovoid, 3-5 × ca. 3 mm; bractlets oblanceolate to spatulate, ca. 2 mm, membranous, apex abruptly contracted and formed into recurved mucro (i.e., squarrose). Spikelets without glumes, with 1 bisexual flower. Stamens 1 or 2; anthers ellipsoid, 0.2-0.3 mm. Style slender, exserted from subtending bract; stigmas 3. Nutlet pale yellowish brown, narrowly obovoid, 0.5-0.6 mm, 3-sided, densely puncticulate, shiny, apex mucronate.
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