Like S. ciliata, a perennial but up to 0.7 m tall, base usually woolly and culm node glabrous. Leaves basal; ligule a fringe of hairs. Inflorescence an open or narrow panicle. Spikelets 12-15 mm long (excluding awns), 1-flowered; glumes obtuse or truncate; lemma 3-awned, only central awn plumose, with articulation near middle of lemma, column present.