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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Howe, M Dorisse
    Type: Article
    In: American fern journal
    Volume: 56
    Date: 1966
    Page Range: 142--142
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Howe, M Dorisse
    Type: Article
    In: Rhodora
    Volume: 70
    Date: 1968
    Page Range: 454--454
    Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]