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Abstract Detail

Systematics Section

Bonifacino, J. Mauricio [1], Funk, Vicki A. [2].

Compositae Classification: Re-visited, re-evaluated, re-everythinged. Part 2.

Continued from Part 1. The South American radiation followed by the African explosion might suggest a Gondwanan origin for the family, but the few data that exist from pollen records and geology seem to indicate a more recent origin for the family. The existence of the monotypic genus Hecastocleis A. Gray inserts a North American taxon in between the South American basal grade and African radiations which might indicate long distance dispersal, or a North American or even an Asian presence. The sister-group to the western hemisphere clade ‘the Heliantheae Alliance’ is the small tribe Athroismeae, from eastern tropical Africa, leaving an unknown area between Africa and western North America. This global picture of the Compositae provides a framework for studies of characters such as pollen, corolla shape, chromosome number, phytochemistry, and many others. In addition to the biogeography displayed on the meta-tree, each of the 46 groups is described and illustrated. All of this information is covered in detail in a recently published book “The Systematics, Evolution, and Biogeography of the Compositae” [see the video on www.youtube.com, search ‘Compositae’].

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Related Links:
The International Compositae Alliance

1 - Universidad de la República, Laboratorio de Botánica , Facultad de Agronomía, Av. Garzón 780, Sayago, Montevideo, CP, 12900, Uruguay
2 - National Museum of Natural History, Smithsonian Institution, Department of Botany, MRC-166, P.O. Box 37012, Washington, DC, 20013-7012, USA


Presentation Type: Poster:Posters for BSA Sections
Session: P1
Location: Event Tent/Cliff Lodge
Date: Monday, July 27th, 2009
Time: 5:30 PM
Number: P1SP015
Abstract ID:530

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