大穗细柄茅 da sui xi bing mao

Ptilagrostis macrospicula L. B. Cai.

Perennial, forming small dense tussocks. Culms 8–18 cm tall, ca. 0.8 mm in diam., 1–2-noded. Leaf blades setaceous, 2–10 cm, abaxial surface glabrous; ligule lanceolate, 2.5–6 mm, denticulate. Panicle contracted, 4–8 × 0.7–1 cm, lowermost branches subtended by 2 ca. 5 mm membranous bracts; lower branches paired, 0.3–2.8 cm, suberect, spikelets few. Spikelets brownish or purplish; glumes lanceolate, unequal, lower glume 8.5–12.5 mm, 3-veined, upper glume 8–9.5 mm, 1-veined, apex acute; lemma 5.5–8 mm, glabrous in middle part, gradually pubescent toward base and apex, apex 2-toothed; awn 14–16 mm, 1-geniculate, plumose below bend with ca. 1.5 mm hairs, pubescent above with ca. 0.4 mm hairs; palea shorter than lemma by 0.5–1.5 mm, 2-veined. Anthers 1.9–2.5 mm, glabrous at apex. Fr. Sep.

* Meadows on mountainsides; ca. 4000 m. Xizang.