Taxonomic revision of Carex chungii (Cyperaceae; sect. Mitratae) and allied species
Taxonomic revision of Carex chungii (Cyperaceae; sect. Mitratae) and allied species
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中氏苔草（莎草科；Mitratae 组）及近缘种的分类学修订
DOI：
10.11646/phytotaxa.317.1.3
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发表时间：
2017-08-11
期刊：
影响因子：
1.1
通讯作者：
Jin, Xiao-Feng
中科院分区：
文献类型：
--
作者：
Jin, Xiao-Feng
本文报道了中国苔草(Carex Chungii)等5个种的名称，外加1变种和1变型，均来自中国苔草属C.Sect.Mitratae，并进行了修订。它们构成了一组形态上非常相似的分类群，很难区分开来。本研究是在文献调查、田野调查、标本采集、形态特征统计分析和扫描电子显微镜观察基础上进行的。用主成分分析(PCA)对11个种群的94个个体的形态数据进行了分析，发现了5个类群，因此我们认为它们对应于5个物种。从瘦果顶端收缩成0.2-0.5 mm长的颈状附属物(与之形成盘状环状花柱基座)以及瘦果周毛被(短柔毛与疏生短柔毛)方面，Genkaisis苔草的瘦果与所有其他物种有显著的不同。安徽苔草(Carex Anhuisis)、宣城苔草(Carex Xuchengensis)和截尾苔草(C.truncatirostris F.erostris)都是截尾苔草的异名。以前承认的来自日本的Karex kamagariensis与C.chungii同名。广东苔草属植物。Rigda被认为是特有的等级，并提出了新的名称南平拟南平。我们的研究是第一次努力解决这个复杂的群体作为一个整体在其整个范围的分类。
In this paper, Carex chungii and other five names at species rank, plus one variety and one form, all from of C. sect. Mitratae, were revised. They constitute a group of morphologically very similar taxa, difficult to tell apart. Our study was based on literature survey, fieldwork, herbarium specimens, statistical analysis of morphological characters and SEM observations of achenes and perigynia. Analysis of morphological data of 94 individuals from eleven populations using principal component analysis (PCA) revealed five clusters, which we consequently considered to correspond to five species. The achenes of Carex genkaiensis were strikingly different from all the other species regarding achene apex contracted into a 0.2-0.5 mm long neck-like appendage (vs. into a discoid-annulate style-base), as well as its perigynium indumentum (pubescent vs. sparsely pubescent). Carex anhuiensis, C. xuanchengensis and C. truncatirostris f. erostris are all synonymized to C. truncatirostris. The previously recognized Carex kamagariensis from Japan is synonymized to C. chungii. Carex chungii var. rigida is recognized as specific rank and the new name C. nanpingensis is proposed. Our study is the first effort to address the taxonomy of this complicate group as a whole in its entire range.