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短药异燕麦Helictotrichon potaninii Tzvel.

短药异燕麦Helictotrichon potaninii Tzvel.

科名:禾本科 Gramineae

属名:异燕麦属 Helictotrichon

《中国植物志》第9(3)卷165页
  12.短药异燕麦(拟)图版42:7-10
  Helictotrichon potaninii Tzvel. in Pl. Asiae Centr. 4: 101. 1968. ——Helictotrichon brachyantherum Keng in Sched.
  多年生。须根细弱。秆基部倾斜,上部直立,光滑无毛,丛生,高25-50厘米,具2-3节。叶鞘松弛,无毛,粗糙或微被毛,短于节间;叶舌膜质,长1.5-3.5毫米,无毛,顶端齿裂;叶片扁平,2-4毫米,分蘖叶长达20厘米,茎生叶长5-10厘米,上面多少粗糙或散生柔毛,下面光滑或近无毛。圆锥花序稠密紧缩似穗状,常间断,稍下垂,红紫色,长5-9厘米,花序轴粗糙,多缩短,具1枚小苞片;小穗红紫色,长7-9毫米,含3-4小花;小穗轴节间长约2毫米,密被长2-4毫米的毛;颖披针形,第一颖长约5毫米,具1脉,第二颖长约7毫米,具3脉;外稃披针形,粗糙,长6-9.5毫米,顶端膜质且2齿裂,基盘具长约 1毫米的毛,芒自稃体中部以上伸出,粗糙,膝曲,长10-14毫米,芒柱扭转;内稃膜质,稍短于外稃,脊具短的纤毛;雄蕊3,花药黄色,较短,仅长1-1.6毫米;子房上端具柔毛。花期6-7月。
  产四川省。生于海拔3900-4180米的高山林下。模式标本采自四川西北部。

《Flora of China》 Vol. 22 (2006)
Helictotrichon potaninii  Tzvelev
短药异燕麦   duan yao yi yan mai
Perennial, loosely tufted. Culms erect from ascending base, 25–50 cm tall, 2–3-noded. Leaf sheaths smooth, glabrous; leaf blades narrowly linear, flat, 5–20 cm, 2–4 mm wide, adaxial surface slightly scabrid or sparsely pilose, abaxial surface almost smooth; ligule 1.5–3.5 mm, margin lacerate. Panicle dense, spikelike, narrowly oblong in outline, 5–9 cm, often interrupted, slightly nodding; branches very short, scabrid. Spikelets 0.7–0.9 cm, reddish violet, florets 3–4; rachilla hairs 2–4 mm; glumes unequal, lower glume ca. 5 mm, 1-veined, upper glume ca. 7 mm, 3-veined; lemmas firm with membranous apex, 6–9.5 mm, scaberulous, apex finely 2-toothed; awn 1–1.4 cm, geniculate, column twisted, terete; palea keels ciliolate. Anthers 1–1.6 mm. Fl. Jun–Jul.
* High mountain forests; 3900–4200 m. Sichuan.

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