Robust caespitose perennial with strongly flabellate basal sheaths.
Inferior glume 1/2, the superior almost as long as spikelet.
Spikelets 3.5–4 mm. long, narrowly ovate.
Superior lemma indistinctly rugulose.
Leaf laminae up to 15 mm. wide.
Culms 2–3 m. high.