Browsing Theses and Dissertations (University of Pretoria) by Supervisor "Van Wyk, Abraham Erasmus (Braam)"
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Browsing Theses and Dissertations (University of Pretoria) by Supervisor "Van Wyk, Abraham Erasmus (Braam)"
Now showing items 21-34 of 34
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(University of Pretoria, 2004)An overview and interpretation of morphological characters is provided for the Mesembryanthemaceae. Characters useful for identification are separated from those of phylogenetic significance. A new tribal classification ...
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(University of Pretoria, 2015)South Africa is one of the most biologically diverse countries in the world, and harbours one of the richest floras. Vast areas of the country remain under-collected, and a large proportion of species are taxonomically ...
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(University of Pretoria, 2009-10-29)Hypoxis is a diverse group of perennial geophytic herbs characterised by hairy leaves and yellow (seldom white) star-shaped flowers. The genus comprises about 70 species with a distribution in the warmer parts of all ...
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(University of Pretoria, 2012-12-14)Elephantorrhiza Benth. is a genus with eight species occurring in southern Africa. A taxonomic revision of this relatively poorly known mimosoid legume genus of medium-sized to small trees or shrubs and geoxylic suffrutices, ...
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(University of Pretoria, 1991)A taxonomic revision of 51 species of Riccia, nearly three quarters of which are probably endemic to southern Africa, as well as the cosmopolitan, mono typic species, Ricciocarpos natans, is presented. The systematic ...
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(University of Pretoria, 1995)A taxonomic revision of all the southern African spiny members of the Celastroideae is presented. Evidence from macromorphology, leaf anatomy, ecology and phytogeography is used as a ...
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(University of Pretoria, 2013)A taxonomic revision of the family Thuidiaceae Schimp. for Africa and the east African Islands is presented. Three genera, namely, Pelekium Mitt., Thuidiopsis (Broth.) M. Fleisch. and Thuidium Bruch & Schimp., and 16 ...
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(University of Pretoria, 1997)
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(University of Pretoria, 1994)
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(University of Pretoria, 1998)Sekhukhuneland is an area of diverse geology and rich phytodiversity. This region harbours the world's largest reserves of chromium and platinum ore. A literature review of heavy metal soils is presented as introduction ...
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(University of Pretoria, 1996)The vegetation of the Kosi Bay Coastal Forest Reserve was classified by means of Braun-Blanquet and TWINSPAN procedures. Twelve major plant communities were identified, occurring along a gradient from the inland fresh ...
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(University of Pretoria, 1998)The grasslands of South Africa, and especially the higher altitudinal grasslands, are under increasing human pressure. In this study a floristic-ecological account of the vegetation of the southernmost Drakensberg and its ...
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(University of Pretoria, 2013-04-05)The grasslands of South Africa, and especially the higher altitudinal grasslands, are under increasing human pressure. In this study a floristic-ecological account of the vegetation of the southernmost Drakensberg and its ...
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(University of Pretoria, 2006-11-30)Please read the abstract in the section, 00front, of this document
Now showing items 21-34 of 34