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Abstract Detail



Systematics Section/ASPT

Hildebrand, Terri [1], Al-Shehbaz, Ihsan [2], Windham, Michael [3].

A New Mustard Discovered from the West Desert Region of the North American Great Basin.

The Brassicaceae is a large and diverse plant family with representatives found on a variety of substrates across the globe. Systematic work over the last decade has elucidated relationships within and among the major tribes and provided an increased understanding of generic relationships. Refinement of kinships, however, continues to be challenged by new placement of existing representatives as well as the discovery of previously undescribed members. In 2012, the discovery of a prostrate, slightly succulent plant growing on extremely alkaline limestone outcrops in North America's Great Basin Desert has again tested the mustard family phylogeny. We present the results from ongoing morphological, molecular, cytological and field studies on the newly discovered plant, providing a description and suggesting its placement in the evolution of Brassicaceae. Along with its distinctive substrate, low population numbers suggest the plant may represent yet another rare, narrow endemic for which the Great Basin is noted.

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1 - Southern Utah University, Biology, 351 W University Boulevard, Center for Health & Molecular Sciences 213, Cedar City, UT, 84720, USA
2 - Missouri Botanical Garden, P. O. Box 299, St. Louis, MO, 63166-0299, USA
3 - Duke University, Department of Biology, Box 90338, Durham, NC, 27708, USA

Keywords:
Brassicaceae tribes
limestone substrates
rare endemics.

Presentation Type: Oral Paper:Papers for Sections
Session: 19
Location: Napoleon Ballroom/Riverside Hilton
Date: Tuesday, July 30th, 2013
Time: 11:00 AM
Number: 19010
Abstract ID:647
Candidate for Awards:None


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