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Geographical History and Infraspecific Morphological Variation of American Cow-Wheat (Melampyrum lineare; Orobanchaceae)

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dc.contributor.advisor Weeks, Andrea
dc.contributor.author Oldham, Karoline
dc.creator Oldham, Karoline
dc.date 2015-04-16
dc.date.accessioned 2015-08-06T18:55:28Z
dc.date.available 2015-08-06T18:55:28Z
dc.date.issued 2015-08-06
dc.identifier.uri https://hdl.handle.net/1920/9721
dc.description.abstract The wildflower American cow-wheat (Melampyrum lineare Desr.) is the sole North American species of an otherwise Eurasian genus. There are four purported varieties of M. lineare, though it has not been thoroughly determined whether they merit designation as distinct taxonomic entities. Further, the evolutionary history of M. lineare has been poorly studied in light of this species’ geographic isolation from the rest of its genus. The goal of this study was to reevaluate and revise the infraspecific taxonomy of Melampyrum lineare and to test hypotheses regarding the evolutionary history of this species using comparative genetic methods. The four purported varieties of M. lineare do not represent truly distinct taxonomic entities based on morphological data. Instead, morphological variation occurs along a continuum with no clear divisions between the putative varieties. Results from comparative genetic methods provide mixed support for the competing hypotheses of European versus Asian ancestry for the sole North American species in Melampyrum.
dc.language.iso en en_US
dc.subject melumpyrum lineare en_US
dc.subject orobanchaceae en_US
dc.subject biogeography en_US
dc.subject infraspecific morphology en_US
dc.subject scrophulariaceae en_US
dc.subject botany en_US
dc.title Geographical History and Infraspecific Morphological Variation of American Cow-Wheat (Melampyrum lineare; Orobanchaceae) en_US
dc.type Thesis en
thesis.degree.name Master of Science in Biology en_US
thesis.degree.level Master's en
thesis.degree.discipline Biology en
thesis.degree.grantor George Mason University en


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