02473nas a2200289   4500008004100000245013600041210006900177260000800246300001400254490000700268520140900275653001901684653001401703653001501717653001201732653001301744653002601757653002801783653001301811653001801824653001801842100001601860700001601876700001401892700001701906856026001923       2002                        eng d00aMonophyly and phylogeny of Monarda (Lamiaceae): Evidence from the internal transcribed spacer (ITS) region of nuclear ribosomal DNA0 aMonophyly and phylogeny of Monarda Lamiaceae Evidence from the i  cJan  a127–1370 v273 aThe phylogenetic relationships of the 16 species of Monarda (Lamiaceae) were investigated using sequences of the internal transcribed spacer regions of nuclear ribosomal DNA. Thymus and Mentha were used as outgroups, and Blephilia, Clinopodium, Conradina, Hesperozygis, Monardella, Pycnanthemum, and Ziziphora were included in the ingroup to test the monophyly of Monarda. Two parsimony searches were performed after removing redundant sequences from the analysis: one with indels scored as missing and a second with indels treated as binary characters, Both searches yielded congruent results, but the treatment of indels as binary characters resulted in considerably more resolution within Monarda. There was strong support for the monophyly of Monarda and a close relationship was found between Monarda, Blephilia, and Pycnanthemum. The molecular phylogeny was completely congruent with the infrageneric classification of the genus. Our results were consistent with hypotheses of hybridization between M. fistulosa and M. lindheimeri in Texas. Despite considerable morphological variation among many species, especially in floral characters, little molecular diversification was found in those same species groups. Intraspecific polymorphism in ITS sequence was found in over half the species examined, and may be attributable to ancestral polymorphism, hybridization, or detection of paralogous loci.10aClassification10aEvolution10aGene Trees10aIslands10aLabiatae10aMolecular Systematics10aMost-Parsimonious Trees10aPatterns10aSequence Data10aSpecies Trees1 aPrather, LA1 aMonfils, AK1 aPosto, AL1 aWilliams, RA  uhttp://apps.isiknowledge.com/InboundService.do?product=WOS&action=retrieve&SrcApp=Papers&UT=000174306000012&SID=2AFL5dnj5MCc8JPedL5&SrcAuth=mekentosj&mode=FullRecord&customersID=mekentosj&DestFail=http%253A%252F%252Faccess.isiproducts.com%252Fcustom_image