郭氏细柄草 guo shi xi bing cao

Perennial, loosely tufted. Culms erect or geniculate at base, herbaceous, 50–110 cm tall, 1.5–2.3 mm in diam., few branched, nodes pubescent. Leaf sheaths glabrous or sparsely tuberculate-hairy; leaf blades linear, 10–20 × 0.5–0.8 cm, adaxial surface scabrid or hispid at base, abaxial surface glabrous or sparsely pubescent; ligule ca. 1.6 mm. Panicle ovate in outline, 10–18 cm; branches pilose in axils; racemes composed of 1–3 spikelet pairs and a terminal triad; rachis internodes and pedicels ciliate. Sessile spikelet ca. 3 mm; lower glume elliptic-lanceolate, back 4–6-veined, slightly sulcate, pilose, margins keeled, thinly ciliate, apex denticulate; upper glume glabrous; awn of upper lemma 0.8–1.2 cm. Pedicelled spikelet equal to or slightly longer than sessile spikelet. Fl. and fr. Jun–Oct.

* Moist roadside thickets, ditch banks; 600–1900 m. SW Sichuan, SE Xizang, NW Yunnan.