疏花剪股颖Agrostis perlaxa Pilger
疏花剪股颖Agrostis perlaxa Pilger
27．疏花剪股颖（禾本科图说）图版61：5-8
Agrostis perlaxa Pilger in Fedde, Repert. Sp. Nov. Beih. 12: 306. 1922; 禾本科图说534.图460. 1959.
直立细弱草本，高达50厘米。秆下部膝曲。具3节，平滑。叶鞘无毛，一般短于节间；叶舌膜质，长2-3毫米，先端常碎裂；叶片线形，扁平，质薄，长6-10厘米，宽1.5-2毫米，微粗糙。圆锥花序细瘦，披针形或宽线形，花后开展，长10-20厘米，宽1-4厘米，每节具2-3分枝，分枝纤细，下部裸露，平滑；小穗黄绿色，穗梗长1-3毫米，微粗糙；第一颖长2.8-3.2毫米，第二颖一般较短，窄披针形，先端渐尖，脊上微粗糙；外稃长1.5-1.9毫米，先端截平，有齿，脉明显，表面被糠粃状物或平滑，芒在外稃中部稍上处着生，膝曲，长(2)4-8毫米，基盘具0.2毫米的毛；内稃长约0.3毫米；花药长0.6-0.8毫米。颖果长圆形，略扁，长约1.2毫米。花果期8-9月。
产四川西部、青海东南部，以及西藏一部分。生于海拔3700-4000米的林灌下、水沟边的湿润处。模式标本采自四川巴塘。
《Flora of China》 Vol. 22 (2006)
Agrostis hookeriana C. B. Clarke ex J. D. Hooker
疏花剪股颖 shu hua jian gu ying
Agrostis perlaxa Pilger; A. poluninii Bor; A. pubicallis Keng ex Y. C. Yang.
Perennial, tufted. Culms erect or slightly geniculate at base, up to 50 cm tall, 0.5–1.2 mm in diam., 2–4-noded. Leaf sheaths smooth; leaf blades very narrowly linear, flat, 5–10 cm × 0.5–2 mm, smooth except toward apex; ligule 2–3 mm, apex lacerate. Panicle very lax, ovate in outline, 7–20 cm, open at and after anthesis; branches 2–3 per node, whorls distant, widely ascending to divaricate, capillary, slightly flexuous, longest up to 9 cm, smooth or slightly scabrid, lower half bare. Spikelets 2.6–3.5 mm, usually violet tinged; glumes unequal, lower glume narrowly lanceolate, longer than upper, upper glume oblong-lanceolate, keel scabrid, apex acuminate; callus hairs ca. 0.2 mm; lemma 2/3 spikelet length, back smooth or scaberulous, awned from just above middle, apex truncate-denticulate; awn weakly geniculate, 2–4 mm; palea ca. 0.3 mm. Anthers 0.6–1 mm. Fl. and fr. Aug–Sep.
Montane forests, among bushes, ditches, damp places; 1900–3600 m. Qinghai, W Sichuan, Xizang, Yunnan [Bhutan, India (Sikkim), Nepal].
The spikelets of Agrostis hookeriana are similar to those of A. sozanensis, but in the former species the panicle is very open and broad, with divaricate branches, and the geographic distribution is more westerly.
别名：疏花翦股颖;
科名：禾本科 Gramineae
属名：剪股颖属 Agrostis
27．疏花剪股颖（禾本科图说）图版61：5-8
Agrostis perlaxa Pilger in Fedde, Repert. Sp. Nov. Beih. 12: 306. 1922; 禾本科图说534.图460. 1959.
直立细弱草本，高达50厘米。秆下部膝曲。具3节，平滑。叶鞘无毛，一般短于节间；叶舌膜质，长2-3毫米，先端常碎裂；叶片线形，扁平，质薄，长6-10厘米，宽1.5-2毫米，微粗糙。圆锥花序细瘦，披针形或宽线形，花后开展，长10-20厘米，宽1-4厘米，每节具2-3分枝，分枝纤细，下部裸露，平滑；小穗黄绿色，穗梗长1-3毫米，微粗糙；第一颖长2.8-3.2毫米，第二颖一般较短，窄披针形，先端渐尖，脊上微粗糙；外稃长1.5-1.9毫米，先端截平，有齿，脉明显，表面被糠粃状物或平滑，芒在外稃中部稍上处着生，膝曲，长(2)4-8毫米，基盘具0.2毫米的毛；内稃长约0.3毫米；花药长0.6-0.8毫米。颖果长圆形，略扁，长约1.2毫米。花果期8-9月。
产四川西部、青海东南部，以及西藏一部分。生于海拔3700-4000米的林灌下、水沟边的湿润处。模式标本采自四川巴塘。
《Flora of China》 Vol. 22 (2006)
Agrostis hookeriana C. B. Clarke ex J. D. Hooker
疏花剪股颖 shu hua jian gu ying
Agrostis perlaxa Pilger; A. poluninii Bor; A. pubicallis Keng ex Y. C. Yang.
Perennial, tufted. Culms erect or slightly geniculate at base, up to 50 cm tall, 0.5–1.2 mm in diam., 2–4-noded. Leaf sheaths smooth; leaf blades very narrowly linear, flat, 5–10 cm × 0.5–2 mm, smooth except toward apex; ligule 2–3 mm, apex lacerate. Panicle very lax, ovate in outline, 7–20 cm, open at and after anthesis; branches 2–3 per node, whorls distant, widely ascending to divaricate, capillary, slightly flexuous, longest up to 9 cm, smooth or slightly scabrid, lower half bare. Spikelets 2.6–3.5 mm, usually violet tinged; glumes unequal, lower glume narrowly lanceolate, longer than upper, upper glume oblong-lanceolate, keel scabrid, apex acuminate; callus hairs ca. 0.2 mm; lemma 2/3 spikelet length, back smooth or scaberulous, awned from just above middle, apex truncate-denticulate; awn weakly geniculate, 2–4 mm; palea ca. 0.3 mm. Anthers 0.6–1 mm. Fl. and fr. Aug–Sep.
Montane forests, among bushes, ditches, damp places; 1900–3600 m. Qinghai, W Sichuan, Xizang, Yunnan [Bhutan, India (Sikkim), Nepal].
The spikelets of Agrostis hookeriana are similar to those of A. sozanensis, but in the former species the panicle is very open and broad, with divaricate branches, and the geographic distribution is more westerly.
