Sessile spikelet 3–4 mm long, glabrous; inferior glume with an often shallow V-shaped median groove, narrowly winged on the keels; superior lemma inconspicuous, entire; awn delicate, 3.5–5 mm long, without a column; anthers 1–1.5 mm long, purple.
A tufted grass. It grows 1.8 m tall. The leaves are rounded at the base. The leaves are 30 cm long and 2.5 cm wide. The flower panicle is dense and 15-20 cm long by 10 cm wide.
Leaves smooth; ligule 2.5–3.5 mm long, erose; laminas 30–40 cm × 8–35 mm, tapering to a fine point at the apex.
Racemes 10–14 mm long; internodes and pedicels pilose with silvery-white hairs.
Inflorescence a dense subovoid to globose head 5–19(30) cm long, greenish.
Robust, caespitose perennial; culms up to 220 cm high.
Pedicelled spikelet male, 2–3 mm long, awnless.