Link-Perez, Melanie A. , Hickey, R. James .
Morphological Variation and Geographical Distribution of Adiantopsis radiata.
The fern genus Adiantopsis Fée (Pteridaceae) is notable for its laminar morphology because its species display three distinct architectures: pinnate, pedate, and palmate. The palmate architecture is arguably the most striking and is best demonstrated in the widespread A. radiata, found throughout the Caribbean and Central America southward into Northeastern Argentina. Study of herbarium specimens as part of monographic work on the genus has revealed a surprisingly large amount of variation within the classical circumscription of A. radiata. As currently interpreted, the complex consists of the widespread A. radiata and several geographically localized, peripheral taxa. These taxa differ from A. radiata in the form of the indusium, the attachment of the ultimate segments to the costae, and the form of the adaxial carinae. Results of morphometric analyses will be presented as well as a discussion of the geographic distribution of the putative taxa.
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1 - Miami University, Department of Botany, Oxford, Ohio, 45056, USA
Presentation Type: Oral Paper:Papers for Sections
Location: Lake Michigan/Hilton
Date: Monday, July 9th, 2007
Time: 9:30 AM