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  1. By: De Roon, A C
    Type: Article
    In: Novon a journal of botanical nomenclature from the Missouri Botanical Garden
    Volume: 15
    Date: 2005
    Page Range: 414--417
    Publication Info: St. Louis, MO, Missouri Botanical Garden,
  2. By: De Roon, A C - Dressler, S
    Type: Article
    In: Novon a journal of botanical nomenclature from the Missouri Botanical Garden
    Volume: 9
    Date: 1999
    Page Range: 248--252
    Publication Info: St. Louis, MO, Missouri Botanical Garden,