@article {Edwards:2008p1097,
	title = {Using patterns of genetic structure based on microsatellite loci to test hypotheses of current hybridization, ancient hybridization and incomplete lineage sorting in Conradina (Lamiaceae)},
	journal = {Molecular ecology},
	volume = {17},
	number = {23},
	year = {2008},
	month = {Jan},
	pages = {5157{\textendash}5174},
	abstract = {Hybridization and/or incomplete sorting of ancestral polymorphism are commonly implicated to explain discordant phylogenetic analyses of closely related species complexes. One genus in which these phenomena have been suggested to have played major roles based on phylogenetic data is Conradina, a genus of mints (Lamiaceae) endemic to the southeastern USA containing several endangered species. The goals of this study were to use microsatellite data to better understand patterns of genetic structure in Conradina, to test hypotheses of recent or ancient hybridization and incomplete lineage sorting, and to clarify species boundaries. Individuals from 55 populations representing all Conradina species were genotyped using 10 microsatellite loci. Analyses of the patterns of genetic structure in Conradina revealed a clear differentiation of populations following recognized species boundaries, indicating that species have diverged from one another genetically and interspecific hybridization has not occurred recently. Neither ancient hybridization nor incomplete lineage sorting is supported as the sole cause of species nonmonophyly, suggesting that both may have contributed to patterns found in phylogenetic trees; however, analyses of other types of data may be more appropriate to distinguish between these two hypotheses. Because all described species appear to be valid entities, the current listing status of most endangered species of Conradina is appropriate; however, populations of Conradina canescens are genetically differentiated into three groups, each of which may merit species status, and several recently discovered populations of Conradina in Dunn{\textquoteright}s Creek State Park in Florida are highly differentiated genetically and also appear to represent a new species.},
	keywords = {Conradina, Consequences, Conservation, Differentiation, Hybridization, Incomplete Lineage Sorting, Inference, Lamiaceae, Microsatellite, Null Alleles, Phylogeny, Population-Structure, Scrub Mints Lamiaceae, Species Boundaries},
	doi = {10.1111/j.1365-294X.2008.03985.x},
	url = {http://www3.interscience.wiley.com/journal/121529596/abstract},
	author = {C. E Edwards and D. E Soltis and P. S Soltis}
}
@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}
}
