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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Evans, R J
    Type: Article
    In: Novon a journal of botanical nomenclature from the Missouri Botanical Garden
    Volume: 2
    Date: 1992
    Page Range: 58--61
    Publication Info: St. Louis, MO, Missouri Botanical Garden,
  2. By: Yatskievych, George Alfred - Evans, R J - Witsell, C. Theo
    Type: Article
    In: Phytoneuron
    Volume: 2013-50
    Date: 2013
    Page Range: 1--11
    Publication Info: Fort Worth, TX, Guy L. Nesom,