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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Tyler, Harry R. - Gawler, Susan C.
    Type: Article
    In: Rhodora
    Volume: 82
    Date: 1980
    Page Range: 207--225
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Gawler, Susan C.
    Type: Article
    In: Rhodora
    Volume: 91
    Date: 1989
    Page Range: 153--153
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  3. By: Gawler, Susan C.
    Type: Article
    In: Rhodora
    Volume: 85
    Date: 1983
    Page Range: 389--390
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],