Phylogenetic analysis ofPhylicaL. (Rhamnaceae) with an emphasis on island species: evidence from plastidtrnL‐Fand nuclear internal transcribed spacer (ribosomal) DNA sequences

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Summary: Richardson, J. E., Weitz, F. M., Fay, M. F., Cronk, Q. C. B., Linder, H. P., Reeves, G. & Chase, M. W.: Phylogenetic analysis ofPhylicaL. (Rhamnaceae) with an emphasis on island species: evidence from plastidtrnL‐FDNA and nuclear internal transcribed spacer (ribosomal DNA) sequences. – Taxon 50: 405–427. 2001. – ISSN 0040‐0262.The relationships of the island species ofPhylicaand other genera inPhyliceae(Rhamnaceae) were evaluated using sequences for the plastidtrnLintron, thetrnL‐Fintergenic spacer and the internal transcribed spacers of nuclear ribosomal DNA. Both regions provided nearly identical phylogenetic patterns, so they were analysed as a combined matrix. The generaNesiotaandNolteawere found to be palaeoendemic species within the context of the tribe. The island species ofPhylicaformed a monophyletic group together with the widespread mainland species,P. paniculata.The plesiomorphic, generalist morphology of this group contrasts with the derived morphological characteristics of the majority of mainland species. However, the group occupies a derived position in the phylogenetic trees, thus indicating either a reversal or more likely the retention of these primitive traits.