Annual herb; culms fistular, erect, branching from the bade; nodes slightly thinckened, glabrous; leaves 20-50 cm long scabrid; sheaths loose,glabrous; ligules 0.8-1 cm. long, membranous, acute spitting at msturity; blades linear-lanceolate, scaberulous on nerves above and along margins; glabrous below; inflorescence a panicle; branches scabrid spikelcts solitary or fascicled at the ends of small branches, oblong laterally compressed; gulmes reduced; lower lemma empty; scale like epaleate, 1-nerved; awn 4 cm long, retrorsely barbed; paleaaute, similar to lemma, 3-nerved; anther 3 light yellow, 2 mm long. caryopsis 5 mm long, shape an size variable in different varieties in different varieties.