Search for dissertations about: "Systematic Botany"
Showing result 16 - 20 of 42 swedish dissertations containing the words Systematic Botany.
-
16. Evolutionary Studies in Asterids Emphasising Euasterids II
Abstract : This thesis deals with evolutionary relationships within the asterids, a group of plants comprising about one-third of all flowering plants.Two new families are recognised: Pennantiaceae and Stemonuraceae. The woody Pennantia from New Zealand and Australia is the sole genus of Pennantiaceae. READ MORE
-
17. Phylogeny and classification of the tribe Vanguerieae (Rubiaceae)
Abstract : Vanguerieae is a tribe in the mainly tropical angiosperm family Rubiaceae. The tribe currently comprises around 600 species in 27 genera, with the major part of the species distributed in Africa south of the Sahara. The phylogeny of the tribe was investigated using both molecular and morphological data. READ MORE
-
18. The genus Xanthoria (Fr.) Th.Fr. in North America
Abstract : The lichenized ascomycete genus Xanthoria (Fr.) Th.Fr. (Teloschistaceae) in continental United States and Canada is revised. READ MORE
-
19. Phylogeny and species delimitation in Roccellaceae and Physciaceae (Euascomycetes)
Abstract : DNA sequence data (the ITS region and Group I Introns) from the nuclear ribosomal repeat (rDNA), partial β-tubulin gene sequences, RAPD markers, and some morphological characters were analysed phylogenetically in order to examine relationships in lichenized Euascomycetes, from the species level to higher taxonomic levels. The species level studies comprise some so-called species pairs in two families, Roccellaceae (Arthoniales) and Physciaceae (Lecanorales). READ MORE
-
20. Phylogenetic Studies in the Euasterids II : with Particular Reference to Asterales and Escalloniaceae
Abstract : The present study is concerned with the evolutionary relationships among the Euasterids II, a group of angiosperms that includes the orders Apiales, Aquifoliales, Asterales, and Dipsacales together with several small, poorly known families yet unplaced as to order.Parsimony analysis of nucleotide sequence data from the chloroplast genes atpB, ndhF and rbcL together with morphological data are used to construct a phylogeny of the order Asterals, which in the present sense includes 11 families and more than 26 000 species. READ MORE