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Contributions to the systematics of selected genera of the Alooideae (Asphodelaceae)
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Contributions to the systematics and biocultural value of Aloe L. (Asphodelaceae)
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Species limits in the Rhodocoma gigantea (Kunth) Linder complex
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Assessment of bitter yam (dioscorea dumentorum [kunth] pax) production in Oyo state, Nigeria
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Evaluation of the floral rewards of Aloe greatheadii var davyana (Asphodelaceae), the most important indigenous South African bee plant
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Molecular systematics of the genus Hypnea (Rhodophyta) in South Africa, with the description of a new genus, Tenebris (Cystocloniaceae, Rhodophyta)
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Systematic studies in the genus Melianthus L. (Melianthaceae)
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Systematic and genomic studies in the plant genus
Zygophyllum
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Contributions to the systematics of the genus Schizochilus
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Systematics of the genus Cliffortia L. [Rosaceae]
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The systematics of the Genus Widdringtonia Endl., (Cupressaceae)
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Molecular systematics of the genus Widdringtonia Endl
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Molecular phylogenetics, systematics, reproductive safeguarding and chromosome evolution of the genus Lachenalia (Asparagaceae: Scilloideae)
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A systematic study of the South African genus Prionium (Thurniaceae)
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Studies in the genus Eulophia R. Br.
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Contributions to the systematics of the genus zantedeschia spreng (Araceae)
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Systematics, biogeography and morphological evolution in Entosthodon Schwägr. (Bryopsida, Funariaceae) with a revision of the genus in Africa
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Systematic studies of the schizaeoid ferns : a taxonomic revision of the genus Mohria Swartz (Anemiaceae)
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Taxonomic studies in the genus Acrostemon Kl. and related genera
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Systematics of Hermannia L. (Malvaceae): a taxonomic review of the genus
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Some observations on the genus Arthrocnemum
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Nutritional and Phytochemical Compositions of Peperomia pellucida (L). Kunth from Bogor, West Java, Indonesia, and Its Hypoglycemic Effects in Normoglycemic Sprague-Dawley Rats Subjected to an Acute Glucose Load
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Taxonomy and evolutionary studies on the genus Psoralea L. (Psoraleeae, Fabaceae)
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Phylogenetic studies in the genus Jamesbrittenia tribe Manuleae, family Scrophulariaceae
