Annual. Stems 3-30 cm x 0.5-2 mm. Bract up to 15 cm, usually much exceeding the inflorescence. Spikelets (1-)2- 12(-20) in the inflorescence, 3-12 mm, ovoid or lanceolate. Glumes 2.5-4 mm, ovate or elliptical, obtuse, shortly apiculate, reddish- or purplish-brown, with green midvein, glabrous, or ciliolate at apex. Perianth-bristles 4-6, rudimentary or short, rarely equalling nut. Stigmas 3. Nut 1- 1.6 mm, obovoid, brown or black, dull, prominently transversely and undulately rugose.