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  1. By: Denslow, Herbert M
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 21
    Issue: 248
    Date: 1920-08
    Page Range: 145--156
    Publication Info: Lancaster, Pa Published for the Garden by the New Era Printing Co 1900-
  2. By: Denslow, Herbert M
    Type: Article
    In: Torreya
    Volume: 19
    Issue: 8
    Date: 1919
    Page Range: 152--156
    Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945