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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Boufford, David E. - Massey, Jim R.
    Type: Article
    In: Rhodora
    Volume: 78
    Date: 1976
    Page Range: 790--791
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Massey, Jim R. - Whitson, Paul D.
    Type: Article
    In: Rhodora
    Volume: 82
    Date: 1980
    Page Range: 97--103
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],