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Abstract Detail

Systematics Section/ASPT

Watson, Reece [1], Clark, John L. [2].

Resolving generic boundaries in Rhytidophyllum and Gesneria: a molecular phylogeny of the Caribbean Gesnerieae (Gesneriaceae).

The Caribbean Gesnerieae is a monophyletic group of more than 70 species.  Generic boundaries within the group are confusing because recent classifications have different generic circumscriptions for Rhytidophyllum and Gesneria. Rhytidophyllum are traditionally distinguished from Gesneria by large bullate or areolate leaves, campanulate flowers, stamens adnate to the base of the corolla, presence of trichomes at base of filaments, and maroon to green flowers.  Gesneria are traditionally distinguished from Rhytidophyllum by tubular flowers that are brightly colored yellow to red, absence of trichomes at the base of filaments, and stamens completely free from corolla tube. Some species are not readily recognized in either genus because they have a combination of red flowers (typical of Gesneria) and pubescent filaments adnate to the base of the corolla tube (typical of Rhytidophyllum). A molecular phylogeny was generated from nrDNA ITS and ETS for 61 species.  This study is the first phylogenetic analysis to broadly sample taxa that are not readily placed in Rhytidophyllum or Gesneria.

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1 - The University of Alabama, Department of Biological Sciences, 745 Tamaha Trace NE, unit 73, tuscaloosa, AL, 35404, United States
2 - The University Of Alabama, Department Of Biological Sciences, Box 870345, Tuscaloosa, AL, 35487, USA

molecular systematics

Presentation Type: Oral Paper:Papers for Sections
Session: 45
Location: River Fork/Grove
Date: Wednesday, July 30th, 2014
Time: 1:30 PM
Number: 45001
Abstract ID:837
Candidate for Awards:None

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