异颖草 yi ying cao

Aulacolepis petelotii Hitchcock, J. Wash. Acad. Sci. 24: 291. 1934; Agrostis continentalis Handel-Mazzetti; A. petelotii (Hitchcock) Noltie; Anisachne gracilis Keng; A. gracilis var. multinodis Y. Y. Qian; Aniselytron gracilis (Keng) N. X. Zhao; A. petelotii (Hitchcock) Soják; Calamagrostis petelotii (Hitchcock) Govaerts; Deyeuxia continentalis (Handel-Mazzetti) L. Liu; Neoaulacolepis petelotii (Hitchcock) Rauschert.

Perennial, densely tufted, old basal sheaths fibrous. Culms slender, erect or geniculate at base, 11–25 cm tall, 2–4-noded. Leaf sheaths smooth; leaf blades linear to filiform, flat or involute, 2–10 cm, 0.5–4 mm wide, scabrid, apex acute; ligule 0.5–2 mm, truncate to lacerate. Panicle narrowly pyramidal, lax, 6–16 cm; branches ascending, lowest in whorls of 2–6, 3–8 cm, capillary, scabrid, bare below middle, secondary branches usually short. Spikelets 2–3 mm, pale green or tinged purple; glumes lanceolate, shorter than floret, 1.8–2.3 mm, lower glume 1-veined, upper glume 1–3-veined, keel scabrid, apex subacute; callus hairs ca. 0.5 mm; lemma as long as spikelet, apex acute or midvein exserted into ca. 0.2 mm mucro; palea 2/3–3/4 as long as lemma; rachilla penicillate, including hairs 0.9–2 mm. Anthers 0.5–0.8 mm. Fl. Jul. 2n = 28*.

Grassy places on sandy acid soils; 1400–3000 m. Guizhou, Yunnan [Bhutan, NE India, N Vietnam].

The type of Anisachne gracilis var. multinodis has not been seen.