Strongly rhizomatous perennial; culms erect, solitary or few together, 1-1.5 m. high; sheaths much longer than the internodes, rounded or keeled toward the summit, glabrous, the lower ones bladeless; ligule brown, not more than 0.5 mm. long; blades elongate, attenuate, usually some of them narrowed to a long petiole-like base, narrower than the mouth of the sheath, 5-10 mm. wide, the margins very scabrous; panicles mostly 30-40 cm. long, narrowed-attenuate toward the summit, the upper branches short and appressed, the lower ones slender, ascending to spreading, somewhat curved or flexuous, commonly 5-10 cm. long; spikelets 3 mm. long, obscured by the long silky hairs on the glumes and callus.
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