| 苔草属复序苔草亚属十四种植物叶片的解剖学研究 |
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| 引用本文： | 张树仁,梁松筠,戴伦凯.苔草属复序苔草亚属十四种植物叶片的解剖学研究[J].中国科学院研究生院学报,1998,36(4):333-340. |
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| 作者姓名： | 张树仁 梁松筠 戴伦凯 |
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| 摘 要： | 选择中国复序苔草亚属6组4亚组的代表植物14种，进行了叶片解剖学研究，观察了其横切面
和表皮特征，证明上述特征在各类群之间存在差异，具有一定的系统学意义。这14种植物叶片的横切
面和表皮都具有一些原始的性状，表明复序苔草亚属中的植物可能在苔草属中是较原始的。在所观察
的植物中，Sect．Polystachyae植物叶片解剖学特征比较一致，说明此组的建立比较合理；而Sect．Indicae
组已有明显分化，尤其是Carex scaposa C．B．Clarke和C．densifimbriata Tang et S．Y．Liang
与其它植物明显不同，而且其外部形态特征在复序苔草亚属中也比较独特，因此赞成将它们及其近缘类群做为一个组而非亚组。
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| 关 键 词： | 苔草属 复序苔草亚属 叶片 横切面 表皮 |
Leaf Anatomy of Fourteen Species in Carex Subgenus Indocarex (Cyperaceae) |
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| ZHANG Shu-Ren,LIANG Song-Yun,DAI Lun-Kai.Leaf Anatomy of Fourteen Species in Carex Subgenus Indocarex (Cyperaceae)[J].Journal of the Graduate School of the Chinese Academy of Sciences,1998,36(4):333-340. |
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| Authors: | ZHANG Shu-Ren LIANG Song-Yun DAI Lun-Kai |
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| Abstract: | Among the subgenera of the genus Carex, the subgenus Indocarex has been sel-
dom studied in any respects, Its systematic position and its subdivision are still disputable.
Leaf anatomy of 14 species in the subgenus lndocarex from China was studied. The anatom-
ical characters are proved to be systematically valuable. (1) Characters of lamina transverse
section: All leaves of these 14 species are dorsiventral. The outline mostly V-shaped, occa-
sionally flat or nearly flat, with adaxial lateral rib in each half of lamina and some of them
flanged. The cells of adaxial surface larger than those of abaxial surface, and the epidermal
cells over veins usually smaller than others. Air-cavities between vascular bundles are well de-
veloped, and bulliform cells also well developed in most taxa. The vascular bundles are collat-
erai, bundle sheaths double-layered, and the outer sheath parenchymatous and the inner
sheath fibrous. (2) Characters of lamina epidermis: The shape of the cell on both surfaces is
generally rectangular, and the anticlinal wall of epidermal cell sinuous; stomata is paracytic,
elliptic to oblong, rarely sub-circular; prickles occur on adaxial surfaces of certain species;
papillae are only obvious on abaxial surface of C. moupinensis Franch. The characters of
transverse section and epidermis of leaf blades of these 14 species differ from each other to
certain degree, and closely related species are similar in anatomical characters. The anatomi-
cal characters of lamina are of value for classification at specific and sectional level of the sub-
genus Indocarex. Despite of the variation of these characters among species, a certain num-
ber of characters appears to be shared by the members of the subgenus, and some of the com-
mon characters are primitive. In addition, some gross morphological characters are common
and primitive also. Therefore, the subgenus Indocarex may be primitive in the genus
Carex. The anatomical and morphological characters of C. scaposa C. B. Clakre and C.
densifimbriata Tang et Wang ex S. Y. Liang are distinct. The two species and their allies
should be treated as section instead of subsection. The three species in the sectionPolystachyae share some anatomical characters and comprise a coherent group. |
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| Keywords: | Carex Subgenus Indocarex Leaf Transverse section Epidermis |
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