Article
Ribosomal DNA evidence and disjunctions of western American Portulacaceae.
Molecular phylogenetics and evolution - 1 Jun 2000
Hershkovitz M A, Zimmer E A
Abstract excerpt
Phylogenetic analysis of ribosomal DNA internal transcribed spacer sequences from 35 members of western American Portulacaceae plus seven Portulacaceae outgroups generally supports morphologically based interpretations of multiple intercontinental disjunctions. The data neither support nor refute monophyly of the western American group but strongly support a group comprising the western American taxa plus...
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