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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Lawson, C A
    Type: Article
    In: Rhodora
    Volume: 99
    Date: 1997
    Page Range: 166--181
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Goodman, George J., - Lawson, C A
    Type: Article
    In: Rhodora
    Volume: 94
    Date: 1992
    Page Range: 381--382
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],