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Species delimitation in the fern genus Lemmaphyllum ( P olypodiaceae) based on multivariate analysis of morphological variation
Author(s) -
WEI XuePing,
ZHANG XianChun
Publication year - 2013
Publication title -
journal of systematics and evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.249
H-Index - 46
eISSN - 1759-6831
pISSN - 1674-4918
DOI - 10.1111/jse.12019
Subject(s) - herbarium , botany , biology , genus , fern , stipe (mycology) , key (lock) , ecology
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.