Tufted annual, 50-150(-220) mm tall. Leaf sheaths frequently dark red, blades filiform. Stems filiform. Inflorescence a terminal head of 1-several spikelets, basal bract conspicuous, filiform, suberect to spreading. Spikelets ovoid, 4-6 x 1.5-2 mm, glumes straw-coloured with dark red markings. Nutlets faintly transversely rugose, minutely papillose or smooth. (July-)Sept.-Dec.
Annual, 5-15 cm. Spikelets straw-coloured and dark red.