ibclogo XVI International Botanical Congess

Abstract Number: 3381
Poster No. = 363


MOLECULAR PHYLOGENY OF SCALESIA ARNOTT (ASTERACEAE-HELIANTHEAE) ON THE GALAPAGOS ISLANDS


Oluf, A., The University of New Mexico, Albuquerque, NM 87131-1091, U.S.A.


Scalesia comprises 15 species all endemic of the Galapagos archipelago. The genus may have originated by adaptive radiation from a single introduction of a species of the South American genus Pappobolus. Most species are single-stemmed or sparingly branched shrubs but S. pedunculata, S. cordatat, and S.microcephala are small trees. Taxonomic treatments of the genus have been performed by Howell (1941), Cronquist (1971) and Eliasson (1974) but a phylogeny based on molecular data has yet to be provided. Results of phylogenetic analysis of ITS-rDNA sequences will be presented.

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