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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Visser, Carina
    Type: Article
    In: Journal of South African botany
    Volume: 31
    Date: 1965
    Page Range: 293--306
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa
  2. By: Visser, Carina
    Type: Article
    In: Journal of South African botany
    Volume: 32
    Date: 1966
    Page Range: 347--377
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa