Annuals or perennials. Inflorescence a panicle, often with whorled primary branches. Spikelets nearly always glabrous, awnless. Ligule a line of hairs. Inflorescence an open or contracted panicle. Spikelets 1-flowered. Glumes membranous, the upper usually longer than the lower. Lemma 1(-3)-nerved, without awns, usually shining; palea as long as lemma or a little shorter. Grain with free pericarp. Fruit rounded or truncate at tip, not beaked. Sporobolus species may resemble species of Eragrostis but are always 1-flowered whereas Eragrostis species have more than 1 floret per spikelet.