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2015 Archive
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Author(s): Lauren M Polito
Presentation: oral
The genus Lomatium, common throughout western North America, forms a group of perennial endemics within the family Apiaceae. Recent analysis has uncovered some of the evolutionary relationships among many of the species of this family. The evolutionary relationships of the Lomatium grayi clade, containing five main species: L. grayi, L. packardiae, L. tamanitchii, L. thompsonii and L. triternatum anomalum, still remains relatively elusive. We explored the relationships among populations of these species and other varieties of L. triternatum using DNA sequence data from one nuclear and three chloroplast genes from over 100 specimens collected in Idaho, Oregon, and Washington and from various herbarium specimens. Primary phylogenetic analysis indicates that L. triternatum var. anomalum is distinct from all of the other varieties of L. triternatum. L. anomalum, L. packardiae, and L. tamanitchii are all in a sister clade to L. grayi. Based on our cladistic analysis, we have identified several populations of a new species resembling L. grayi in Adams Co., Idaho, which appears to be genetically distinct from all other L. grayi populations. Altogether, the results indicate that there is more variability within the L. grayi clade than formerly known.
The College of Idaho 2112 Cleveland Blvd Caldwell, ID 8360 USA 208-459-5011 800-2C-IDAHO