细叶芨芨草 xi ye ji ji cao

Stipa chingii Hitchcock, Proc. Biol. Soc. Washington 43: 94. 1930.

Perennial, densely tufted. Culms erect, 40–70 cm tall, ca. 1.5 mm in diam., 2–3-noded. Leaf sheaths shorter than internodes, smooth; leaf blades filiform, convolute, soft, up to 25 cm, 0.5–1 mm wide, scabrid; ligule lanceolate, 2–4 mm, often 2-lobed or obtuse. Panicle open or loosely contracted, 10–20 cm; branches often paired, laxly ascending or lower spreading, lower part bare, upper part with few spikelets. Spikelets 7–12 mm, yellowish green or purple at base; glumes subequal, lanceolate-oblong, membranous, lower 7–8 mm, 1–3-veined, upper 8–10 mm, 3-veined, apex obtuse; callus obtuse or acute, 0.5–1 mm; lemma 6–8 mm, lower back pubescent, apex 2-toothed; awn persistent, 1–1.8 cm, 1(–2)-geniculate, column twisted, pubescent, bristle glabrous; palea slightly shorter than lemma. Anthers ca. 2 mm, glabrous or with a few hairs at apex. Fl. and fr. Jul–Sep.

* 2200–4000 m. Gansu, Qinghai, Shaanxi, Shanxi, Sichuan, Xizang, Yunnan.

This taxon appears to differ from Achnatherum duthiei only in its shorter anthers. An examination of a sufficient quantity of specimens may show them to be the same species.