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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Edwards, Wilfred Norman
    Type: Article
    In: Annals of botany
    Volume: 35
    Date: 1921-10
    Page Range: 609--617
    Publication Info: London, Academic Press [etc.],
  2. By: Edwards, Wilfred Norman
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 7
    Series: 9
    Date: 1921
    Page Range: 442--444
    Publication Info: London Taylor and Francis, Ltd