Search for dissertations about: "Systematic Botany"
Showing result 21 - 25 of 42 swedish dissertations containing the words Systematic Botany.
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21. Systematics of Echiochilon and Ogastemma (Boraginaceae), and the Phylogeny of Boraginoideae
Abstract : Echiochilon, Ogastemma and Sericostoma are revised resulting in the recognition of 15 species of Echiochilon and one Ogastemma species. Several species are placed in synonymy and three new species are described, E. baricum, E. callianthum and E. READ MORE
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22. Selection and Floral Evolution in Platanthera bifolia and P. chlorantha (Orchidaceae)
Abstract : Natural selection mediated by pollinators has influenced the evolution of floral diversity of the flowering plants (angiosperms). The scope of this thesis was to study: 1) phenotypic selection, 2) mating systems, and 3) floral shifts involved in plant speciation. Model plant species were Platanthera bifolia and P. chlorantha (Orchidaceae). READ MORE
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23. Geographic differentiation and population history in Silene dioica and S. hifacensis: variation in chloroplast DNA and allozymes
Abstract : In this thesis I used allozymes and PCR-RFLP analysis of chloroplast DNA (cpDNA) to investigate geographic differentiation within the widespread Silene dioica (L.) Clairv. (Caryophyllaceae) and the narrowly-distributed S. hifacensis Rouy ex Willk. READ MORE
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24. Phylogenetic and taxonomic studies in the tribe Antirrhineae (Scrophulariaceae) with special reference to the genera Kickxia and Nanorrhinum
Abstract : The main aims of the present study are (1) to investigate phylogenetic relationships within the Antirrhineae using both morphological and molecular data, and (2) to provide an improved classification of the genus Kickxia sensu lato.Phylogenetic relationships within the tribe Antirrhineae are analysed and discussed on the basis of parsimony analyses of morphological and ndhF gene sequence data. READ MORE
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25. Geographic Variation, Hybridization and Evolution in the Bladder Campions, Silene vulgaris and S. uniflora (Caryophyllaceae)
Abstract : In the present thesis, I investigated the inter- and intraspecific variation in the Silene vulgaris/uniflora species-complex (the bladder campions). I have focused on the effects of past and present hybridization both on a large scale ? over the whole of Europe ? and on a local scale. Silene vulgaris and S. READ MORE