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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Yates, Ida E. - Duncan, Wilbur H. (Wilbur Howard),
    Type: Article
    In: Rhodora
    Volume: 72
    Date: 1970
    Page Range: 289--312
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],