泛喜马拉雅地区铁线蕨属细叶铁线蕨系的分类学修订

在标本研究和野外考察的基础上,结合微形态分析结果和植物地理学资料,对泛喜马拉雅地区铁线蕨属细叶铁线蕨系进行丫分类学修订。研究结果表明该系植物囊群盖的形状、末回小羽片上缘锯齿的形态和鳞片微形态特征是物种划分的重要性状。承认泛喜马拉雅地区该系植物分布有7种和2变种,分别是陇南铁线蕨Adiantum roborowskii、肾盖铁线蕨A．roborowskiivar．robustum、毛足铁线蕨A．bonatianum、冯氏铁线蕨A．fengianum、长盖铁线蕨A．fimbriatum、白背铁线蕨A．davidii、长刺铁线蕨A．davidiivar．longispina、细叶铁线蕨A,venustum和西藏铁线蕨A．tibeticum。对三个分类学名称进行了归并,即将圆齿铁线蕨Adiantun breviserratum处理为长盖铁线蕨A．fimbriatum的异名,肾盖铁线蕨Adiantum erythrochlamys处理为A．roborowskii var．robustum的异名．无芒铁线蕨Adiantum bonatianum var．subaristatum处理为毛足铁线蕨A．bonatianum的异名。     

Taxonomic Revision of Adiantum ser. Venusta Ching (Pteridaceae) from Pan Himalayas*

Based on morphological study of specimens and extensive fieldwork, with the analysis of the micromorphology and phytogeographic materials, the series Venusta of Adiantum from Pan Himalayas was taxonomically revised. It turns out that the shapes of indusia on fertile pinnules and the morphological characteristics of apical serrations on ultimate pinnules and the microstructures of scales are the most important characters for species identification. Seven species and two varieties were recognized from Pan Himalayas: Adiantum roborowskii, A. roborowskii var. robustum, Abonatianum, Afengianum, Afimbriatum, Adavidii, Adavidii var. longispina, Avenustum and Atibeticum. Three published names were reduced to synonyms: Adiantum breviserratum was synonym of Afimbriatum, Adiantum erythrochlamys was synonym of Aroborowskii var. robustum and Adiantum bonatianum var. subaristatum was synonym of Abonatianum.