Inflorescence 10–45 cm. long, bearing appressed racemes 1–7 cm. long, these sessile and simple, or the inferior stalked and sometimes compound with the spikelets in little appressed racemelets 1–2 cm. long; pedicels strongly flattened.
Spikelets 4.5–6.5 mm. long; inferior glume a broadly obtuse cuff up to 1/10 length of spikelet; superior lemma obtuse, pubescent all over.
Culms 60–150 cm. high.
Tufted perennial.