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  1. By: Gardner, Wright Austin
    Publication info: Chicago, 1921
    Holding Institution: University Library, University of Illinois Urbana Champaign
  1. By: Gardner, Wright Austin
    Type: Article
    In: Botanical gazette
    Volume: 71
    Issue: 4
    Date: 1921
    Page Range: 249--288
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991