Species delimitation in the fern genus Lemmaphyllum （Polypodiaceae） based on multivariate analysis of morphological variation  

作　　者：Xue-Ping WEI Xian-Chun ZHANG 

机构地区：[1]State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China [2]University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Journal of Systematics and Evolution》2013年第4期485-496,共12页植物分类学报（英文版）

基　　金：Acknowledgements This study was supported by the National Natural Science Foundation of China （Grant No. 31070182）. The authors of this paper are grateful to the administrators of the herbaria PE, PYU, K, KATH, and TNS for checking specimens. The authors also thank Professor Dr. H. SCHNEIDER for critical reading of the manuscript and offering helpful suggestions for improving the manuscript, and thank Mr. N. SHRESTHA and Mr. J. W. LI for improving the English.

摘　　要：The species delimitation of Lemmaphyllum, including the former segregated Lepidogrammitis in China, was considered as unresolved. Previous treatments accepted between one and 20 species. In the present study, multivariate analysis and maximum parsimony analyses were carried out on data from herbarium specimens of this genus by evaluating 24 quantitative characters and 13 qualitative characters. In total, 558 specimens representing 11 previously accepted species and one variety in China were studied. As a result, three species and two varieties were recognized, Lemmaphyllum pyriforme, L. rostratum, L. carnosum, L. carnosum var. microphyllum, and L. carnosum var. drymoglossoides. Two new combinations and seven new synonyms were introduced. An identification key and distribution maps were provided. This study also elucidated the diagnostic value of two previously ignored characters, scales at the base of stipe and laminae hydathodes.The species delimitation of Lemmaphyllum, including the former segregated Lepidogrammitis in China, was considered as unresolved. Previous treatments accepted between one and 20 species. In the present study, multivariate analysis and maximum parsimony analyses were carried out on data from herbarium specimens of this genus by evaluating 24 quantitative characters and 13 qualitative characters. In total, 558 specimens representing 11 previously accepted species and one variety in China were studied. As a result, three species and two varieties were recognized, Lemmaphyllum pyriforme, L. rostratum, L. carnosum, L. carnosum var. microphyllum, and L. carnosum var. drymoglossoides. Two new combinations and seven new synonyms were introduced. An identification key and distribution maps were provided. This study also elucidated the diagnostic value of two previously ignored characters, scales at the base of stipe and laminae hydathodes.

关 键 词：hydathodes Lepidogrammitis morphological characters scales species delimitation taxonomy. 

分 类 号：Q949.36[生物学—植物学] O212.4[理学—概率论与数理统计]