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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Bouchard, André, - Hay, S
    Type: Article
    In: Rhodora
    Volume: 78
    Date: 1976
    Page Range: 207--260
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Brouillet, Luc, - Hanel, C - Hay, S - Maunder, J E
    Type: Article
    In: Rhodora
    Volume: 106
    Date: 2004
    Page Range: 167--177
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],