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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Upham, Alan W
    Type: Article
    In: Rhodora
    Volume: 44
    Date: 1942
    Page Range: 456--457
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Upham, Alan W
    Type: Article
    In: American fern journal
    Volume: 12
    Date: 1922
    Page Range: 96--97
    Publication Info: [Washington, etc.] American Fern Society