@ARTICLE{TreeBASE2Ref15850, author = {Andrew L. Hipp and Anton A. Reznicek and Paul E. Rothrock and Jaime A. Weber}, title = {Phylogeny and Classification of Carex Section Ovales (Cyperaceae)}, year = {2006}, keywords = {}, doi = {}, url = {}, pmid = {}, journal = {International Journal of Plant Sciences}, volume = {167}, number = {5}, pages = {1029--1048}, abstract = {Section Ovales is the most species-rich section of the sedge genus Carex in the New World. Phylogenetic analyses of molecular data recover a predominantly New World clade as sister to a solitary East Asian species, C. maackii. Nuclear ribosomal DNA are congruent in the placement of all taxa within the section, with a solitary exception: incongruence between ITS and ETS data in the placement of C. bonplandii and C. roraimensis suggests a hybrid origin for this lineage. Biogeography correlates strongly with phylogeny in the section, but there have been at least two instances of long-range dispersal, one from an eastern North American clade to western North America and one from the New World to Eurasia. Morphological characters studied are all homoplastic. Developing a comprehensive infrasectional classification with a phylogenetic basis would be complicated by the fact that most of the novel morphological characters in the section have evolved within relatively small, independent clades.} }

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