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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Anderson, Edgar, - Ownbey, Ruth Peck
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 26
    Date: 1939
    Page Range: 325--348
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  2. By: Ownbey, Ruth Peck
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 31
    Date: 1944
    Page Range: 373--413
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-