2. Agrostis pilosula Trinius, Mém. Acad. Imp. Sci. Saint-Pétersbourg, Sér. 6, Sci. Math., Seconde Pt. Sci. Nat. 6, 4(3–4): 372. 1841.
柔毛剪股颖 rou mao jian gu ying
Agrostis beimushanica J. L. Yang; A. ciliata Trinius (1845), not Thunberg (1784); A. eriolepis Keng ex Y. C. Yang; A. muliensis J. L. Yang; A. pilosula var. wallichiana (Steudel) Bor; A. royleana Trinius; A. wallichiana Steudel; Calamagros-tis pilosula (Trinius) J. D. Hooker; Pentatherum pilosulum (Trinius) Tzvelev.
Annual or short-lived perennial, tufted. Culms loosely ascending or decumbent at base and rooting from lower nodes, 30–90 cm tall, 3- or 4-noded. Leaf sheaths glabrous; leaf blades linear, flat, 3–20 cm × 3–5 mm, both surfaces scabrid; ligule 2.5–6 mm, apex lacerate. Panicle lanceolate to ovate in outline, 10–30 cm, open or somewhat contracted; branches 2–7 at each node, 2–5 cm, scabrid, bearing branchlets mainly in distal half. Spikelets 3–4 mm, green or purple; glumes oblong-lanceolate, lower glume slightly longer than upper glume, keel conspicuously scabrid-hispidulous, apex acuminate, upper glume scabrid upward on keel, apex acute; callus hairs 0.4–0.5 mm; lemma ca. 2/3 spikelet length, back villous except below apex, awned at or near lower 1/3, apex truncate, erose; awn geniculate, 3–4 mm; palea usually ca. 1/3 length of lemma. Anthers 0.7–1.5 mm. Fl. Aug.
Grassy mountain slopes; 3600–4200 m. Qinghai, W Sichuan, Yunnan [Bhutan, India, Nepal, Pakistan, Sri Lanka].
This is a polymorphic species in which several rather ill-defined varieties have been distinguished. Agrostis pilosula var. pilosula has a large, effuse panicle with branches to 10 cm. The name A. pilosula var. wallichiana has been misapplied to a variant with a smaller, stiffly branched panicle and small, purple spikelets. The type of A. wallichiana has a pale green panicle with long, flexuous branches.