蒙古异燕麦 meng gu yi yan mai

Avena mongolica Roshevitz, Izv. Glavn. Bot. Sada SSSR 27: 96. 1928.

Perennial, densely tufted. Culms erect, 12–16 cm tall, glabrous or scabrid, 1–2-noded. Leaf sheaths glabrous or minutely puberulous; leaf blades filiform, 15–30 cm, 1.5–2 mm wide, puberulous on adaxial surface; ligule of basal leaves 2–3 mm, of culm leaves ca. 0.5 mm, margin puberulous. Panicle contracted or rather lax, 3–9 cm, often somewhat 1-sided; branches paired, 1–2 cm, puberulous. Spikelets 1–1.2 cm, yellowish brown or variegated violet, florets 3; rachilla bearded; glumes 9–11 mm, lower glume 1-veined, upper glume 3-veined; lowest lemma 8–10 mm, 5–7-veined, apex 2-toothed; awn 1.3–1.5 cm, geniculate, column twisted, terete; palea keels scabrid. Anthers ca. 4 mm. Fl. and fr. Jun–Sep.

Montane forests, subalpine meadows, riversides; 1200–2700 m. Xinjiang [Kazakhstan (Tarbagatai Mountains), Mongolia, Russia (Siberia)].