大序雀麦 da xu que mai

Perennial, with short rhizomes. Culms tufted, ca. 1 m tall. Leaf sheaths pubescent or with reflexed hairs, scabrid along veins, mouth with auricles; leaf blades soft, ca. 20 cm × 3–5 mm, abaxial surface and margins scabrid, adaxial surface pubescent; ligule ca. 1 mm, abaxial surface hairy. Panicle spreading, ca. 25 cm; branches 2–5 per node, up to 12 cm, scabrid, each bearing 2 or 3 spikelets. Spikelets ca. 20 mm, florets 7–9; rachilla internodes 3–4 mm, shortly hairy; glumes scabrid, margins membranous, lower glume 6–7 mm, 1-veined, upper glume 8–10 mm, 3-veined, apex long acuminate to aristiform; lemmas narrow, 10–12 mm, 5–7-veined, pubescent; awn 4–11 mm, not recurved, scabrid; palea subequal to lemma, keels shortly stiffly ciliate. Anthers ca. 3 mm. Fl. and fr. Jun–Aug.

Grassy slopes; 2700–3200 m. S Xizang [Bhutan, N India, Kashmir, Nepal].