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  1. By: Rigg, George B. (George Burton) - Trumbull, H. L. (Harlan Leo), - Lincoln, Mattie
    Type: Article
    In: Botanical gazette
    Volume: 61
    Issue: 5
    Date: 1916
    Page Range: 408--416
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991