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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Allison, R. V. (Robert Verrill) - Shive, John W
    Type: Article
    In: American journal of botany
    Volume: 10
    Issue: 10
    Date: 1923-12
    Page Range: 554--566
    Publication Info: Lancaster, Pa, Published in cooperation with the Botanical Society of America by the Brooklyn Botanic Gardens, 1914-