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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Gordon-Gray, K D
    Type: Article
    In: Journal of South African botany
    Volume: 44
    Issue: 1
    Date: 1978
    Page Range: 67--81
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa
  2. By: Gordon-Gray, K D - Schorn, D P K
    Type: Article
    In: Journal of South African botany
    Volume: 41
    Issue: 3
    Date: 1975
    Page Range: 133--162
    Publication Info: Kirstenbosch National Botanic Gardens of South Africa