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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Bolus, L
    Type: Article
    In: Journal of South African botany
    Volume: 4
    Date: 1938
    Page Range: 51--51
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa
  2. By: Bolus, L
    Type: Article
    In: Journal of South African botany
    Volume: 18
    Date: 1952
    Page Range: 135--143
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa