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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Sieren, D J - Warr, Karen R.
    Type: Article
    In: Rhodora
    Volume: 94
    Date: 1992
    Page Range: 156--166
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],
  2. By: Sieren, D J
    Type: Article
    In: Phytologia
    Volume: 23
    Date: 1972
    Page Range: 304--304
    Publication Info: Bronx Park, New York H.A. Gleason and H.N. Moldenke
  3. By: Sieren, D J
    Type: Article
    In: Rhodora
    Volume: 83
    Date: 1981
    Page Range: 551--579
    Publication Info: [Cambridge, Mass., etc.], New England Botanical Club [etc.],