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Abstract Detail

Systematics Section/ASPT

Pace , Matthew Charles [1], Cameron, Kenneth [2].

Phylogenetics systematics of Spiranthes (Orchidaceae): Assessing species-limits and hybridization.

Spiranthes (ladies’ tresses orchids) - the second largest orchid genus in North America (ca. 32 spp.) - is a complex terrestrial orchid genus plagued by systematic difficulties due to intra-specific morphological variation, inter-specific morphological similarities, cryptic speciation, and suspected hybridization. Relationships among recognized species and species delimitation remain clouded or unknown for nearly all taxa; this may have detrimental consequences for conservations efforts. Although hybridization is considered to be nearly pervasive, evidence is limited. Using multi-nuclear and plastid locus data sets, the morphological limits of species and the role of hybridization are assessed under a history-bound phylogenetic species concept. Current species circumscriptions do not reflect actual phylogenetic histories and the role of hybridization reads to be reconsidered.

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1 - University Of Wisconsin - Madison, 430 Lincoln Drive, Birge Hall, Madison, WI, 53706, USA
2 - University Of Wisconsin, Department Of Botany, 154 Birge Hall, 450 Lincoln Drive, Madison, WI, 53706, USA

Cryptic species
species delimitation
North America.

Presentation Type: Oral Paper:Papers for Sections
Session: 31
Location: Pines South/Boise Centre
Date: Tuesday, July 29th, 2014
Time: 4:15 PM
Number: 31010
Abstract ID:415
Candidate for Awards:None

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