短毛野青茅 duan mao ye qing mao

Calamagrostis anthoxanthoides (Munro) Regel; Stilpno-phleum anthoxanthoides (Munro) Nevski.

Perennial, subloosely tufted, shortly rhizomatous. Culms erect, 10–35 cm, 2–3-noded. Leaf sheaths smooth or slightly scabrid; leaf blades flat, 3–8(–15) cm, 2–5 mm wide, scabrid or almost smooth, apex acuminate; ligule 4–6 mm. Panicle very dense, spikelike, broadly oblong to ovate in outline, 2–6 × 1.2–2 cm, light brownish purple becoming golden; branches abbreviated, spikelets crowded close to main axis. Spikelets narrowly lanceolate, 5–7 mm, shining; glumes lanceolate, subequal, ca. 1/3 longer than lemma, membranous, smooth, 1-veined, apex finely acuminate; callus hairs 1/6–1/3 length of lemma; lemma 4–6 mm, ca. 2/3 length of glumes, hyaline, apex 4-denticulate; awn sub-basal, 6–9 mm, geniculate; palea as long as lemma; rachilla 1–1.5 mm, including hairs 2–2.5 mm. Anthers 2–2.5 mm. Fl. and fr. Jun–Jul.

Rocky hillsides, screes, moraines; 3100–4500 m. Xinjiang, Xizang [NE Afghanistan, Tajikistan, Uzbekistan].

The typical subspecies is described above. A second subspecies, Calamagrostis anthoxanthoides subsp. laguroides (Regel) Tzvelev (which name has never been transferred to Deyeuxia), occurs in Tajikstan. It is distinguished by a somewhat laxer, paler panicle and a lemma less than 2/3 as long as the glumes.