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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Duval, B
    Type: Article
    In: Rhodora
    Volume: 95
    Date: 1993
    Page Range: 21--24
    Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]
  2. By: Duval, B - Hoham, R W
    Type: Article
    In: Rhodora
    Volume: 102
    Date: 2000
    Page Range: 365--372
    Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]