Studies on the subgenus Coprosma (Rubiaceae) from New Zealand
Abstract (Summary)Restricted Item. Print thesis available in the University of Auckland Library or available through Inter-Library Loan. The species of the subgenus Coprosma have been studied on the basis of populations of living plants. Related species from areas outside New Zealand have been examined where relevant for comparisons. Coprosma australis is reduced to synonymy under C. lucida and C. grandifolia is reinstated. Two subspecies (ssp. macrocarpa and ssp. vulgaris) are accepted within C. macrocarpa. Coprosma macrocarpa ssp. vulgaris is further subdivided into two varieties (var. vulgaris and var. fruticosus) Taxonomic adjustments reduce C. lucida var. angustifolia Cheeseman and C. lucida var. obovata Kirk to synonymy. under C. dodonaefolia. Within the section Petiolatae, C. chathamica is placed in the subsection Chathamicae. Coprosma baueri has been examined in detail and where appropriate is considered for relationships to species of section Petiolatae. Inter and intraspecific relationships (population-based) are surveyed on the basis of general morphology, epidermal studies, seedling morphology, palynology, phytochemistry, distribution, habitat and ecology. Most of the morphological characters are analysed for the first time for the subgenus Coprosma. Surface features of pollen has not provided much information but the different exine components can be used to complement traditional morphological studies. Phytochemistry is used not only for comparisons between species and sections but also in detailed surveys of intraspecific variations. Detailed analyses shown by phytochemistry are possible because of the large number of potential characters. Both phytochemistry and palynology give strong support to sectional relationships proposed on morphological ground. Both morphological and phytochemical characters are assessed independently and collectively by using different similarity coefficients and rjk based results are discussed in detail.
School Location:New Zealand
Source Type:Master's Thesis
Date of Publication:01/01/1980