@article {Edwards:2008p1100,
	title = {Phylogeny of Conradina and related southeastern scrub mints (Lamiaceae) based on GapC gene sequences},
	journal = {International Journal of Plant Sciences},
	volume = {169},
	number = {4},
	year = {2008},
	month = {Jan},
	pages = {579{\textendash}594},
	abstract = {Phylogeny reconstruction at the species level, especially using organellar markers, is often complicated by problems such as incomplete lineage sorting and interspecific hybridization. Single-copy nuclear genes may be useful for these cases because they have higher mutation rates and are biparentally inherited. One plant group in which hybridization and incomplete lineage sorting have been proposed based on analyses of internal transcribed spacer (ITS) and plastid data is a clade of mints from the southeastern United States: Conradina and the related genera Dicerandra, Piloblepbis, Stacbydeoma, and Clinopodium (Lamiaceae). To clarify the phylogeny in this clade and investigate the possibility of incomplete lineage sorting and interspecific hybridization, we isolated three members of the nuclear GapC gene family and used two to reconstruct phylogeny. Separate phylogenetic analyses of the two GapC loci did not resolve species relationships. We then used two approaches to concatenate the two heterozygous GapC loci with ITS and plastid data sets from a previous study and carried out combined analyses. Trees resulting from the two concatenation approaches were similar in the resolution and support of generic relationships, but they differed drastically in resolution and support for relationships within Conradina. Conradina species are probably very recently derived, and it may be unreasonable to reconstruct species relationships in Conradina using DNA sequence data due to widespread hybridization or lack of coalescence. Rapidly evolving microsatellite data may be more useful for detecting hybridization and clarifying species boundaries in Conradina.},
	keywords = {Accuracy, Congruence, Conradina, Dna-Sequences, Evolutionary Biology, Gapc, Incongruence, Inference, Lamiaceae, Length Difference Test, Nuclear Genes, Phylogeography, Recombination, Reconstruction, Species Phylogeny},
	doi = {10.1086/528758},
	url = {http://www.journals.uchicago.edu/doi/abs/10.1086/528758},
	author = {Christine E Edwards and David Lefkowitz and Douglas E Soltis and Pamela S Soltis}
}
@article {Edwards:2006p1091,
	title = {Molecular phylogeny of Conradina and other scrub mints (Lamiaceae) from the southeastern USA: Evidence for hybridization in Pleistocene refugia?},
	journal = {Systematic Botany},
	volume = {31},
	number = {1},
	year = {2006},
	month = {Jan},
	pages = {193{\textendash}207},
	abstract = {Conradina (Lamiaceae) consists of six allopatric species endemic to the southeastern United States, four of which are federally endangered or threatened. The limits and status of several taxa have been contested based on morphological grounds, and clarification of these limits is necessary for the design and implementation of effective and fiscally responsible protection and management plans. The objectives of this study were to investigate the monophyly of Conradina and its relationship to other endemic mints of the southeastern United States, to understand the patterns of diversification in Conradina, and to clarify species relationships. A molecular phylogeny was inferred by sequencing ITS and plastid regions from multiple accessions of each species of Conradina (except for a single accession of C. verticillata) and multiple individuals from species of Clinopodium, Dicerandra, Piloblephis, Stachydeoma, Monarda, Pycnanthemum, and Mentha. ITS sequence data strongly support the monophyly of Conradina, in agreement with evidence from morphology. In contrast, plastid sequence data do not support a monophyletic Conradina and place the genus as paraphyletic to Clinopodium, Stachydeoma, and Piloblephis. Similar plastid haplotypes are shared by different genera, perhaps due to shared ancestral polymorphisms, or more likely, introgression that occurred recently or during the Pleistocene. Within Conradina, ITS sequence data do not resolve species relationships, while plastid sequence data do not support the monophyly of most traditionally defined species of Conradina that are distinguishable morphologically. Species relationships in the plastid data set may also be obscured by introgression or ancestral polymorphism. More rapidly evolving sequence data from nuclear markers will be necessary to clarify relationships in Conradina and related mints from the southeastern United States.},
	keywords = {Armeria Plumbaginaceae, Chloroplast Dna, Incongruence, Length Difference Test, Maximum-Likelihood, Mitochondrial-Dna, Noncoding Regions, Nuclear Ribosomal Dna, Reticulate Evolution, Sequences},
	url = {http://apps.isiknowledge.com/InboundService.do?product=WOS\&action=retrieve\&SrcApp=Papers\&UT=000236119500018\&SID=2AFL5dnj5MCc8JPedL5\&SrcAuth=mekentosj\&mode=FullRecord\&customersID=mekentosj\&DestFail=http\%253A\%252F\%252Faccess.isiproducts.com\%252Fcustom_image},
	author = {CE Edwards and DE Soltis and PS Soltis}
}
