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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Carlsen, Tor - Bleeker, Walter - Hurka, Herbert - Elven, Reidar, - Brochmann, Christian
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 96
    Issue: 2
    Date: 2009
    Page Range: 215--236
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-