Tufted annual, up to 450 mm tall. Leaf blades flat, margins undulate; ligule an unfringed membrane. Inflorescence a delicate, verticillate panicle. Spikelets 2-3 mm long, small, green, sometimes tinged with purple, glumes shorter than spikelet, sterile lemmas corrugate, glabrous, blunt, the second with a pair of granular basal appendages.
Annual to 45 cm. Leaf blades flat, with wavy margins. Spikelets in an open panicle, small, green or green and purple, glumes shorter than spikelet, sterile lemmas corrugate, glabrous, blunt, the second with a pair of basal granular appendages.