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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Pilz, George E
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 68
    Date: 1981
    Page Range: 172--203
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  2. By: Pilz, George E
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 25
    Date: 1978
    Page Range: 113--132
    Publication Info: Berkeley, California Botanical Society,