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A Unified Approach to Taxonomic Delimitation in the Fern Genus Pentagramma (Pteridaceae)

dc.contributor.author Pryer, Kathleen M
dc.contributor.author Schuettpelz, E
dc.contributor.author Windham, MD
dc.date.accessioned 2015-10-28T20:29:45Z
dc.date.issued 2015-01-01
dc.identifier.issn 0363-6445
dc.identifier.uri http://hdl.handle.net/10161/10796
dc.description.abstract © Copyright 2015 by the American Society of Plant Taxonomists.The native goldback and silverback ferns of western North America, composing the genus Pentagramma, are phylogenetically isolated within the xeric-adapted cheilanthoid clade. Although species-poor compared to its sister group, Pentagramma encompasses a diverse array of morphotypes, cytotypes, and flavonoid chemotypes. Because the differences are generally cryptic, however, the various entities are usually recognized at an infraspecific level. In recent years, as many as five subspecies have been ascribed to P. triangularis, and only P. pallida has been considered sufficiently divergent to warrant recognition as a distinct species. In this study, we take a unified approach to taxonomic delimitation in Pentagramma. Combining spore studies with phylogenetic analyses of plastid and nuclear sequences, we identify six genetically and morphologically distinct diploid lineages, each of which is here treated as a species. A new species is described (P. glanduloviscida) and three new combinations are made (P. maxonii, P. rebmanii, and P. viscosa).
dc.relation.ispartof Systematic Botany
dc.relation.isversionof 10.1600/036364415X689366
dc.title A Unified Approach to Taxonomic Delimitation in the Fern Genus Pentagramma (Pteridaceae)
dc.type Journal article
pubs.begin-page 629
pubs.end-page 644
pubs.issue 3
pubs.organisational-group Biology
pubs.organisational-group Duke
pubs.organisational-group Trinity College of Arts & Sciences
pubs.publication-status Published
pubs.volume 40
dc.identifier.eissn 1548-2324


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