内蒙古大麦 nei meng gu da mai

Plants perennial, laxly tufted. Culms 80–140 cm tall, 3–5-noded, glabrous throughout. Leaf sheath glabrous; ligule 0.5–1 mm, membranous; leaf blade 6–15 × 0.4–0.6 cm, abaxial surface subglabrous, adaxial surface pubescent. Spike reddish brown, 7–16 × 0.5–0.7 cm; rachis slightly brittle. Lateral spikelets: pedicellate, usually sterile; pedicel 0.5–1 mm; glumes setaceous, 6–8 mm; lemma lanceolate, 5–7 mm, awn 3–4 mm. Central spikelet: sessile, usually with 2 florets; proximal floret fertile, distal one sterile; glumes lanceolate-setaceous, 6–9 mm, obscurely 2- or 3-veined; lemma lanceolate, 7–10 mm, pubescent, awn 6–8 mm. Anthers yellow, 2–2.3 mm. Caryopsis 2.5–3.5 × ca. 2 mm. Fl. and fr. Jul–Aug.

* Mountain slopes; ca. 1200 m. Nei Mongol, Qinghai.