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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Sponsler, Olenus Lee,
    Edition: Rev.
    Publication info: Ann Arbor, Mich, G. Wahr, 1916
    Holding Institution: University of California Libraries
  1. By: Sponsler, Olenus Lee,
    Type: Article
    In: American journal of botany
    Volume: 9
    Issue: 9
    Date: 1922-11
    Page Range: 471--492
    Publication Info: Lancaster, Pa, Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1914-