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A Phylogenetic Study of the New World Cleome (Brassicaceae, Cleomoideae)

Lupita Sánchez-Acebo
Annals of the Missouri Botanical Garden
Vol. 92, No. 2 (Jul., 2005), pp. 179-201
Stable URL: http://www.jstor.org/stable/3298513
Page Count: 23
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A Phylogenetic Study of the New World Cleome (Brassicaceae, Cleomoideae)
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Abstract

This study was designed to investigate phylogenetic and morphological relationships within Cleome, focusing on the South American species. Relationships were inferred from the chloroplast genomic trnH-psbA. Phylogenetic analyses support the monophyly of Cleome and the recognition of three clades within it, which are supported morphologically by seed and pollen characters. The African clade contains only African species (Old World); the Andean and Tarenaya clades include all the New World species, most of which are distributed in South America. The well-suported Andean clade groups the Andean species and contains Podandrogyne nested within it. The Tarenaya clade is formed mostly by species of the spiny section Tarenaya. Although there is little resolution in the deeper nodes of the phylogeny, the results do suggest that some sections/groups are not monophyletic. In general, seed and, to a lesser extent, pollen characters were found to be systematically useful within Cleome.

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