Plants perennial; not rhizomatous. Culms 90-150 cm, erect; nodes 1-2 (3), pubescent or puberulent; internodes usually puberulent, occasionally glabrous, pilose to densely pubescent below the nodes. Sheaths densely pubescent to pilose, hairs to 1 mm, collars pilose, hairs to 2 mm; auricles absent; ligules 0.5-2.5 mm long, sparsely to densely pubescent, obtuse, erose; blades 7.5-16.5 cm long, 3-12 mm wide, flat, densely pubescent on both surfaces. Panicles 5-16 cm, open; branches erect, ascending and appressed to slightly spreading. Spikelets 25-35 (45) mm, terete to moderately laterally compressed, with 3-7 florets. Glumes sparsely to densely pubescent; lower glumes 5-8 (9) mm, 1 (3) -veined; upper glumes (7) 8-9 mm, 3-veined, sometimes mucronate; lemmas 10-14 mm, elliptic, rounded over the midvein, backs sparsely to densely pubescent, margins pubescent, apices entire; awns 3.5-7 mm, straight, arising less than 1.5 mm below the lemma apices; anthers 3-6 mm. 2n = unknown.
"decumbent" is not a number.