rhizomatous grasses. Leaf-blades linear or ligule a line of hairs.
Inflorescence a narrow spikelike
panicle, composed of numerous racemes on a long central axis, with densely
imbricate spikelets. Spikelets strongly laterally compressed, several to many
flowered, sessile or subsessile, falling entire; glumes unequal, lanceolate,
1-nerved, membranous; lemmas glabrous, keeled, ovate, acute, muticous, papery
to leathery, 3-nerved; paleas equal to or slightly shorter than lemmas,
2-keeled. Caryopsis obliquely ovoid, trigonous.