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  1. New Zealand Botanists
    By: Ewan, Joseph
    Type: Article
    In: Rhodora
    Volume: 53
    Date: 1951
    Page Range: 271--272
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  2. The perennial southwestern Datura and the validity of Matthew’s hypothesis in plant geography
    By: Ewan, Joseph
    Type: Article
    In: Proceedings of the California Academy of Sciences
    Volume: 25
    Series: 4
    Date: 1944
    Page Range: 235--244
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  3. Some Irish Naturalists
    By: Ewan, Joseph
    Type: Article
    In: Rhodora
    Volume: 53
    Date: 1951
    Page Range: 95--95
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  4. Who Conquered the New World? Or Four Centuries of Exploration in An Indehiscent Capsule
    By: Ewan, Joseph
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 78
    Date: 1991
    Page Range: 57--64
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