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Abstract Detail


Systematics Section

Lichtenwald, Samantha [1], Fleming, Samantha [1], Shiels, Derek [2], Monfils, Anna [3].

A phylogenetic analysis of North American Schoenoplectus and Schoenoplectiella (Cyperaceae).

Schoenoplectus sensu lato (Cyperaceae) is a genus of annual and perennial monocots with a cosmopolitan distribution, predominantly occurring in wetlands.Species in the group are notoriously difficult to describe; species are defined based on few cryptic characters and hybridization is rampant. Recent taxonomic revision in the group has resulted in a more narrow circumscription of Schoenoplectus and the erection of a new genus Schoenoplectiella. In North America there are 23 species and varieties of Schoenoplectus or Schoenoplectiella,many of these still require taxonomic revision to determine and designate generic status. To investigate diversity, resolve generic status and elucidate relationships among taxa and genera in North American Schoenoplectus sensu lato, we conducted a molecular phylogenetic analysis of the nuclear ribosome ITS region and a second independent DNA dataset from the trnTLF chloroplast regions. Phylogenetic evidence was examined relative to morphological data from field collections and voucher specimens from across North America. The resulting phylogenetic analysis including North America's Schoenoplectus sensu lato species and all GenBank accessions will be presented representing the largest study of Schoenoplectus sensu lato diversity yet conducted. This data will be presented relative to proposed taxonomic revisions in North American species and species complexes and a global re-circumscription of the genera.

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1 - Central Michigan University, Biology, 217 Brooks Hall, Mount Pleasant, MI, 48858, USA
2 - Central MIchigan University, Biology Department, 217 Brooks Hall, Mount Plesant, MI, 48858, USA
3 - Central Michigan University, 180 Brooks Hall, Mount Pleasant, MI, 48859, USA

Keywords:
cyperaceae
Schoenoplectus
Schoenoplectiella
North America
nrITS
trnTLF.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Khorassan Ballroom/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 5:30 PM
Number: PSY051
Abstract ID:328


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