Systematics Section / ASPT
Lauri, Robert .
The Systematic and Phylogenetic Study of the Subgenus Piperia (Orchidaceae) and Closely Related Platanthera.
This a preliminary study that has collected comparative data for the group Piperia that will (1) test the hypothesis that Piperia is a monophyletic group within Platanthera Rich. sensu lato (Bateman et al., 2003); (2) test the hypothesis that the green flowered Piperia taxa are a monophyletic group; and (3) characterize all of the variation within the group and produce a comprehensive classification using molecular and morphological data. Piperia are a group of approximately 10 taxa native to the western and northern United States and Canada. After all previous studies of the group, complete descriptions of many of the Piperia are non-existent, and morphometric data are missing for a number of morphological variants such as P. cooperi, P. lancifolia, P. leptopetala, P. longispica, and P. maritima. In addition, there are no currently recognized synapomporhies that unite Platanthera (Hapmen and Inoue, 1996), especially when Piperia are included within the genus. It is clear that a more thorough sampling of Platanthera populations and morphological variants, across the distributional range, is necessary. This study proposes to sample more broadly within Piperia and closely related Platanthera than any previous studies. This sampling will determine the extent of the morphological and molecular variation within these groups, and assist in elucidating the relationships among them.
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1 - Rancho Santa Ana Botanic Garden, Botany, 1500 North College Avenue, Claremont, CA, 92116, USA
Presentation Type: Oral Paper:Papers for Sections
Location: Continental A/Hilton
Date: Tuesday, July 10th, 2007
Time: 11:00 AM