Perennial, rhizomatous or tufted, tall, reed-lik
grass. Culms robust up to 7 m tall.
Leaf-blades linear, ligule a ciliolate membrane, leaf-sheaths rounded.
Inflorescence a plume-like panicle, racemes numerous, disarticulating, bearing
paired similar spikelets, one sessile, one pedicelled. Spikelets lanceolate,
disarticulation below glumes, pedicellate spikelets enveloped in long silky
hairs; lower glume 2-keeled; upper glume boat-shaped; lower floret sterile,
upper floret perfect; lemma lanceolate, shorter than spikelets, hyaline,
awnless or awned; paleas rarely absent. Lodicules 2, cuneate. Stamens 3.
Caryopsis subglobose to oblong.