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Systematics Section / ASPT

Anderson, Gregory J. [1], Bohs, Lynn [2], Santos-Guerra, Arnoldo [3], Bernardello, Gabriel [4], Opel, Matthew R. [1], Martine, Christopher [1].

The Few and the Odd: the Solanaceae of the Canary Islands and The African Connectionsof the Endemic Solanum vespertilio and S. lidii.

The Canary Islands host a rich flora, as is expected from an ancient near-continent archipelago. The Solanaceae is poorly represented in species numbers, but the four endemic species in three (or two) genera are notable. The endemic Withania is cryptically dioecious. The very rare species of the former genus Normania (= Solanum) bears flowers with slightly zygomorphic corollas, and is dramatically heterandrous. The two uncommon and endemic species of Solanum sensu stricto are highly unusual in their reproductive characters. Both S. lidii and S. vespertilio are andromonoecious. Both are also likely self compatible and highly heterandrous, with short ?reward? anthers and one long "pollination" anther. Both species have strongly zygomorphic corollas.In addition, S. vespertilio corollas are only four parted, and flowers bear only four anthers. Furthermore, a significant percentage of S. vespertilio plants display incipient enantiostyly. Given their islanddistribution andmany distinctive features, the phylogenetic position of these two solanums has been of interest for some time. We confirm here, with new molecular data, the hypothesis that these two unusual solanums are phylogenetically associated with the geographically proximal African Solanum lineages, rather than with the previously suggested Mexican species (sect Nycterium) with analogous zygomorphic corollas and heterandry.


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1 - University of Connecticut, Department of Ecology & Evolutionary Biology, 75 North Eagleville Rd. U-3043, Storrs, Connecticut, 06269-3043, USA
2 - University of Utah, Department of Biology, 257 S. 1400 E., Salt Lake City, Utah, 84112, USA
3 - Jardin de Aclimatacion de la Orotava, Calle Retama Numero 2, Puerto de la Cruz, Teneri, Canary Islands, E-38040, Spain
4 - Universidad De Cordoba, Instituto Multidisciplinario De Biologia Vegetal (Imbiv), Museo Botanico, Casilla De Correo 495, Cordoba, 5000, Argentina

Keywords:
island biodiversity
molecular phylogenetics
reproductive biology
Solanaceae
Solanum.

Presentation Type: Oral Paper
Session: 48-1
Location: Salon G - Austin Grand Ballroom/Hilton
Date: Wednesday, August 17th, 2005
Time: 1:00 PM
Abstract ID:161


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