Annuals, biennials or perennials. Leaf-blades flat, folded or convolute. Inflorescence an open or contracted panicle. Spikelets (2-)3-10-flowered, slightly compressed; glumes unequal, 1-3-nerved, shorter than the lemmas, glabrous; lemmas rounded on the back, rarely keeled, often ciliolate to erose at the tip, sometimes ± acute or apiculate, 5-nerved, awnless; palea about as long as the lemma, 2-keeled; stamens 3; hilum sub-basal and punctiform.