作者
John L Clark, Patrick S Herendeen, Laurence E Skog, Elizabeth A Zimmer
发表日期
2006/5
期刊
Taxon
卷号
55
期号
2
页码范围
313-336
简介
Episcieae is the most diverse tribe of Gesneriaceae, with 22 genera and over 700 species, or roughly 21% of all Gesneriaceae. The tribe is restricted to the Neotropics and is characterized by axillary flowers derived from a pair–flowered cyme inflorescence by reduction, a three–trace trilacunar node with split lateral bundles, superior ovaries, and with most members having a haploid chromosome number of n = 9 [n = 8 in Codonanthe and Nematanthus]. Most traditionally recognized genera in Episcieae are either known to be non–monophyletic or have not been represented adequately in phylogenetic analyses to test their monophyly. This paper presents phylogenetic analyses utilizing two molecular [the internal transcribed spacer region of 18S–26S nuclear ribosomal DNA (ITS) and the trnH–psbA intergenic spacer for 155 species] and one morphological (99 characters for 120 species) datasets, combined in a …
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