Drew, Bryan T. , Sytsma, Kenneth J. , Delventhal, Naomi .
Phylogenetics of Lepechinia (Lamiaceae).
Lepechinia is a genus composed of about 42 species with a native range from the Sierra Nevada foothills of Northern California to central Argentina. Species of dubious origins also occur in Hawaii and Reunion Island. Due to a high morphological diversity and a putative ancient divergence, no synapomorphies for the genus have been found other than a potentially distinctive odor. Previous morphological work by Carl Epling (1935-1968) and Jeffrey Hart (1983) left unanswered questions regarding the monophyly of Lepechinia and the intrageneric relationships within the group. This study addresses these questions using a molecular phylogenetic approach with sequence data from four nuclear and four plastid markers.
Sectional delimitations as proposed by Epling are found to be incorrect in some cases and will be discussed. Chloroplast and nuclear markers are found to be broadly similar but contain multiple points of incongruence. Possible reasons for the incongruence will be evaluated and discussed.
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1 - University of Wisconsin-Madison, Botany, 430 Lincoln Drive, Madison, WI, 53706-1381, USA
2 - University of Wisconsin-Madison, Botany, 430 Lincoln Drive, Madison, WI, 53706, United States
3 - University of Manitoba, Department of Biological Sciences, Winnipeg, Manitoba, R3T 2N2, Canada
Presentation Type: Oral Paper:Papers for Sections
Location: 555A/Convention Center
Date: Wednesday, August 4th, 2010
Time: 10:30 AM