雅库羊茅 ya ku yang mao

Plant tufted, turf-forming, base clothed in old sheaths. Culms 50–80 cm tall, nodes 2–3. Leaf sheaths glabrous; auricles present as erect swellings or absent; leaf blades conduplicate, filiform, stem blades 4–8 cm × ca. 0.3 mm, basal blades up to 30 cm, veins 5–7; adaxial to abaxial sclerenchyma strands absent, abaxial sclerenchyma in broad bands or continuous; ligule 0.1–0.3 mm, margin ciliolate. Panicle loosely contracted, 5–10 cm; branches 2–3 cm. Spikelets 5–7.5 mm, usually purplish, occasionally greenish, tawny at maturity; florets 4–7; glumes smooth, margins and apex broadly membranous; lower glume narrowly lanceolate, 1.8–2.2 mm; upper glume broadly lanceolate, 2.8–3.2 mm; lemmas 3–4 mm, punctiform, apex acute or obtuse; awns absent; palea keels scabrid or ciliolate. Anthers 1.5–2 mm. Ovary apex glabrous. Fl. and fr. Jun–Aug.

Hill slopes, meadows, open forests; 700–1800 m. Heilongjiang, Jilin, Liaoning, Nei Mongol [E Russia].