檢視无茎菅的原始碼


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| style="background: #008080" align= center|  '''<big>无茎菅</big> '''

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| <center><img src=https://www.cvh.ac.cn/cvhpic/spm-l/SZG/SZG00057847.jpg width="250"></center>
<small>[https://www.cvh.ac.cn/spms/detail.php?id=f5a7c8fc  来自 植物智 的图片]</small>

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中文名:无茎菅

学 名:Themeda

helferi Munro ex Hackel

界:植物界

门:被子植物门

纲:单子叶植物纲

目:禾本目

科:[[禾本科]]

族:高粱族

属:[[菅属]]

种:无茎菅

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'''无茎菅'''(wú jīng jiān)，学名： Themeda helferi Munro ex Hackel，异名：Themeda acaulis  Themeda ciliata subsp. helferi  Themeda quadrivalvis var. helferi  ，属[[禾本科]]，一年生草本 纤细的秆，单生或在小松散多孔软岩，可达30厘米高内。 叶鞘短于节间，无毛； 叶片平或折叠， 5-10 * 0.2-0.4 厘米，一些基于小瘤的刚毛在下部边缘，或无毛，锐尖； 叶舌约1毫米，削去，具短缘毛。
<ref>[http://www.iplant.cn/info/Themeda%20helferi?t=focn 无茎菅], 植物智, 2020-01-18</ref>

==形态特征==
一年生草本 纤细的秆，单生或在小松散多孔软岩，可达30厘米高内。 叶鞘短于节间，无毛； 叶片平或折叠， 5-10 * 0.2-0.4 厘米，一些基于小瘤的刚毛在下部边缘，或无毛，锐尖；

叶舌约1毫米，削去，具短缘毛。 Spathate束簇生于全部叶腋从基部向先端的秆，束簇聚集关于纤细有节分枝； 

佛焰苞和spatheoles狭披针形尾状， Homogamous的小穗全部无柄，在相同的水平出现， 无梗小穗约4毫米； 胼胝体0.5-1毫米，钝，棕色具髯毛；

全部的背的更低的颖片稍扁平，短柔毛； 芒3.5-4.5 厘米Pedicelled小穗5-6毫米，无意义。

Themeda acaulis B. S. Sun & S. Wang; T. ciliata (Linnaeus f.) Hackel subsp. helferi (Munro ex Hackel) A. Camus; T. quadrivalvis (Linnaeus) Kuntze var. helferi (Munro ex Hackel) Bor.Annual. Culms very slender, solitary or in small loose tufts, up to 30 cm tall. 

Leaf sheaths shorter than internodes, glabrous; leaf blades flat or folded, 5–10 × 0.2–0.4 cm, a few tubercle-based bristles on lower margins, otherwise glabrous, acute; ligule ca. 1 mm, truncate, ciliolate. 

Spathate fascicles arising from all leaf axils from base to apex of culm, fascicles congregated on slender 1–3-noded branches; spathes and spatheoles narrowly lanceolate-caudate, glabrous, innermost ca. 2 cm. 

Raceme composed of a triad of 1 sessile and 2 pedicelled spikelets above the involucre of 2 homogamous pairs. Homogamous spikelets all sessile, arising at same level, male with both glumes present, 4–5 mm, narrowly lanceolate, stiffly setose in upper half with ca. 3 mm, tubercle-based bristles, upper keels scabrid. 

Sessile spikelet ca. 4 mm; callus 0.5–1 mm, obtuse, brown bearded; lower glume dorsally slightly flattened, pubescent throughout; awn 3.5–4.5 cm. Pedicelled spikelet 5–6 mm, barren.

==产地生境==
Stream banks; ca. 600 m. Yunnan (Longling, Zhenkang) [Myanmar (Tenasserim)].

河边 约600米云南(Longling，Zhenkang) [缅甸(Tenasserim) ].

==辨析==
This slender, annual species is remarkable in that fascicles of racemes are borne all the way down to the base of the plant, so that the whole culm in effect forms the compound inflorescence. It appears to be rare and fairly localized in its distribution.

这纤细，一年生草本种惊人总状花序的束簇着生一直到植株的基部， 它看起来在它的分布里稀有和相当局限。
==标本鉴定信息==
学名	Themeda helferi Munro ex Hackel
中文名	无茎菅
鉴定人	谭策铭
鉴定时间	19990114
===采集信息===
采集人	谭策铭
采集号	9611007
采集时间	19961106
采集地	中国 江西省

海拔	170
生境	低丘马尾松林下
习性	草本
物候期	有花无果
== 参考来源 ==
{{reflist}}

[[Category:370 植物學總論]]