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Title: A global reassessment of the generic relationships in the bellflower family (Campanulaceae)
Author: Eddie, William M. M.
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 1997
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This study was undertaken to determine the phylogenetic relationship of the genera of the Campanulaceae and to discover the major factors determining the evolution of the family, particularly the origins of the higher taxa. It was also an attempt to utilise evolutionary data in order to produce a general purpose phylogenetic system of classification while simultaneously avoiding unnecessary nomenclatural changes or disturbances to patterns of overall similarity. An extensive introduction to the family is provided, dealing with morphology, ecology and geographical distribution as well as a detailed account of the historical classifications of the Campanulaceae and its global relationships. Some particular difficulties associated with patterns of variation encountered in the family Campanulaceae are outlined. Philosophical issues such as the historical treatment of the genus, generic concepts, homology and methodologies are extensively discussed. A pluralistic or eclectic approach was taken for the taxonomic analyses which involved the construction of five principal data sets (higher taxa, flowers and fruits, pollen, seeds, and molecular characters). Cytological and biogeographical data were also taken into consideration. Methodologies were varied, involving both phenetic and cladistic approaches and the problems of handling multiple data sets were discussed. A new phylogenetic classification of the higher taxa to the subtribal level of the Campanulaceae is presented and some guidelines for the recognition of genera are suggested. A general outline of the phylogenetic evolution of the family is given and the major factors which have influenced this evolution are discussed. Conservation measures and the areas for priority research are briefly outlined and an extensive list of literature citations is provided.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available