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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Duggar, Benjamin M. (Benjamin Minge), - Severy, J W - Schmitz, Hermann,
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 4
    Date: 1917
    Page Range: 165--173
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  2. By: Duggar, Benjamin M. (Benjamin Minge), - Severy, J W - Schmitz, Hermann,
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 4
    Date: 1917
    Page Range: 279--288
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-