Journal
AMERICAN JOURNAL OF BOTANY
Volume 92, Issue 7, Pages 1189-1198Publisher
WILEY
DOI: 10.3732/ajb.92.7.1189
Keywords
biogeography; Canary Islands; Limonium; Messinian; molecular phylogenetics; nonparametric rate smoothing (NPRS); Plumbaginaceae; rbcL; trnL intron; trnL-F spacer
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Phylogenetic relationships within Litnonium (Plumbaginaceae) are evaluated using sequence data from three plastid regions (rbcL, the trnL intron, and the trnL-trnF intergenic spacer). Sixty-six species representing the major genera of Staticoideae, including representatives of all sections and genera formerly included in Lintonium, have been analyzed using four species of Plumbaginoideae as an outgroup. Analyses of each separate and combined data set yield similar results. Afrolimon is embedded in Limonium and related to L vulgare, the type of Limonium. Limonium is split into two major clades corresponding to subgenera, but otherwise the current infrageneric classification proved to be artificial. Some groups restricted to particular areas can be recognized, and their synapomorphies are discussed. The presence of an isolated taxon in the Canary Islands is used as a calibration point for age estimates of the major events in the genus, including migrations to the Southern Hemisphere, the Canary Islands, and Asia. The rapid radiation of Limonium in the Mediterranean basin appears to coincide with the desiccation of the Mediterranean Sea in the Messinian (late Miocene).
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