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Abstract Detail

Systematics Section

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

Compositae Classification: Re-visited, re-evaluated, re-everythinged. Part 1.

The Compositae family is the most successful family of flowering plants containing 1 of every 10 species. It is monophyletic and the sub-familial classification and ideas about relationships within the family remained largely unchanged until the 1990’s. The results of recent broad-scale molecular studies of the tribes (involving > 40 collaborators) were used to produce a meta-tree formed by linking the respective trees together on a known base tree. There are now 43 tribes and the meta-tree contains 46 tribes, sub-tribes and unplaced taxa. It represents most of the genera of the family and has multiple species for known paraphyletic genera. The branches are color coded to reflect the distribution of the terminal taxa. The extant lineages from the basal grade are southern South American in origin followed by a subsequent radiation in Africa that gave rise to most of the tribes we know today. Nested in the African radiation are individual clades in Asia, Eurasia, Australia, the Americas, etc. Highly nested in the base tree there is a North American origin and diversification of the Heliantheae Alliance that involved repeated incursions into Mexico and South America. All taxa of islands are highly nested in various Asteroideae clades except for Hesperomannia near the base of the Vernonieae.

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Related Links:
The International Compositae Alliance

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


Presentation Type: Poster:Posters for BSA Sections
Session: P1
Location: Event Tent/Cliff Lodge
Date: Monday, July 27th, 2009
Time: 5:30 PM
Number: P1SP013
Abstract ID:528

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