Perennial, rhizomatous; shoots extravaginal. Culms erect, 40–50 cm, 1–2 mm in diam., nearly smooth, nodes 3 or 4. Leaf sheaths smooth, usually longer than internodes, uppermost ca. 11 cm, ca. 3/4 as long as blade; blades flat, thin, 5–20 cm × 2–3 mm, distinctly longer upward along culm, apex slender prow-tipped; ligules 2.5–3 mm, abaxially puberulent, apex truncate. Panicle open, narrowly pyramidal, 10–15 × 2–3 cm, longest internodes ca. 2 cm; branches ascending, usually 5 per node, capillary, scabrid, longest ca. 3 cm with 6–9 moderately crowded spikelets in distal 4/5. Spikelets narrowly lanceolate, 3.5–4 mm, florets 2; vivipary absent; glumes narrowly lanceolate, equal, as long as spikelet, apex acuminate, keels scabrid from near base, lower glume 3.8–4 mm, 3-veined, upper glume 4.1–4.5 mm, 3-veined; lemmas narrowly lanceolate, 3–3.3 mm, keel shortly villous for 1/2 of length, marginal veins for 1/4, area between veins glabrous; callus webbed, hairs short; palea "hyaline," distinctly shorter than lemma. Anthers 0.7–0.8 mm (doubtfully mature, presumably over 1.2 mm at maturity). Fl. and fr. Aug.
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