Inferior glume 3–4 mm. long with an awn 4–7 mm. long, the superior glume acuminate.
Superior lemma with aristulate lobes, the central awn 14–20 mm. long.
Inferior lemma acuminate, its palea 3.5–5 mm. long, elliptic, woody.
Palea keels terminating in a small swelling.
Spikelets 7–8 mm. long.
Panicle 3–15 cm. long.
Culms 30–90 cm. high.
Annual.