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FOC | Family List | FOC Vol. 22 | Poaceae | Agrostis

21. Agrostis sinocontracta S. M. Phillips & S. L. Lu, Fl. China. 22: 347. 2006.

紧序剪股颖 jin xu jian gu ying

Replaced synonym: Agrostis contracta Y. C. Tong ex Y. C. Yang, Bull. Bot. Res., Harbin 4(4): 100. 1984, not Agrostis contracta F. Mueller ex J. D. Hooker, Fl. Tasman. 2: 116. 1858.

Perennial, tufted. Culms erect, 30–50 cm tall, 1–2 mm in diam., 3–4-noded. Leaf sheaths loose, smooth; leaf blades linear, soft, culm blades 10–14 cm × 3–5 mm, blades of tillers ca. 1 mm wide, abaxial surface scabrid or almost smooth, adaxial surface scabrid; ligule 1–2.5 mm, apex truncate. Panicle laxly contracted, lanceolate in outline, 10–15 cm; branches 1–3 at each node or sometimes secondary branching from base, narrowly ascending, 2.5–3.5 cm, almost smooth, a few widely scattered scabridities, bearing spikelets for most of length. Spikelets 2.5–3 mm, green tinged purplish gray; glumes narrowly lanceolate, lower glume slightly longer than upper glume, keel scabrid, apex acuminate; callus hairs 0.1–0.2 mm; lemma ca. 1/2 spikelet length, awned from upper 1/4–1/3, apex emarginate-denticulate; awn recurved in right angle from lower 1/3, slightly twisted below bend, 3–3.3 mm; palea ca. 0.25 mm. Anthers 0.5–0.7 mm. Fl. and fr. Aug–Oct.

* Alpine meadows; ca. 4000 m. NW Yunnan (Bijiang, Gongshan).

Agrostis filipes J. D. Hooker, from Kashmir and the Khasi Hills of NE India, also has awns arising from above the middle of the lemma back and a small palea. It differs in having narrower culm leaf blades 1–2.5 mm wide, a densely contracted panicle, and a fine awn 1–2 mm.


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