@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 {Moon:2008p1109,
	title = {A search for phylogenetically informative pollen characters in the subtribe Salviinae (Mentheae : Lamiaceae)},
	journal = {International Journal of Plant Sciences},
	volume = {169},
	number = {3},
	year = {2008},
	month = {Jan},
	pages = {455{\textendash}471},
	abstract = {The pollen morphology and ultrastructure of the subtribe Salviinae were investigated with light, scanning electron, and transmission electron microscopy. In addition, cladistic analyses of the obtained morphological data, supplemented with rbcL data from GenBank, were conducted in order to assess the phylogenetic signal of palynological characters. Salviinae pollen is small to large, oblate to prolate in shape, with a circular to slightly elliptic amb, and mostly hexacolpate. Perovskia abrotanoides appears to be distylous and shows a significant pollen dimorphism between pin and thrum flowers. The sexine ornamentation of the genera Lepechinia and Chaunostoma is perforate, while the ornamentation of other genera is bireticulate. Perovskia expresses a unique type of sexine ornamentation. The sexine ornamentation variation in Salvia has systematic importance but only partly corresponds with current phylogenetic hypotheses. Unbranched columellae and a continuous, granular endexine are hypothesized to be a symplesiomorphic condition in the tribe Mentheae. Our combined phylogenetic analyses show that the addition of palynological characters contributes to improved resolution and also increases bootstrap support values in comparison with molecular phylogenetic analyses.},
	keywords = {Distyly, Grains, Labiatae, Morphology, Orbicules, Palynology, Perovskia, Phylogeny, Pollen Dimorphism, Salviinae, Systematics},
	doi = {10.1086/526463},
	url = {http://www.journals.uchicago.edu/doi/abs/10.1086/526463},
	author = {Hye-Kyoung Moon and Stefan Vinckier and Jay B Walker and Erik Smets and Suzy Huysmans}
}
@article {Edwards:2008p349,
	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},
	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, Piloblephis, Stachydeoma, 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.},
	author = {CE Edwards and D Lefkowitz and DE Soltis and PS Soltis}
}
