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  1. By: Wiens, Delbert - Rourke, John P - Casper, Brenda B - Rickart, Eric A. - Lapine, Timothy R - Peterson, C Jeanne - Channing, Alan
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 70
    Date: 1983
    Page Range: 1--31
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-