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  1. By: Tilton, John Kent
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 51
    Issue: 608
    Date: 1950-08
    Page Range: 181--186
    Publication Info: Lancaster, Pa Published for the Garden by the New Era Printing Co 1900-
  2. By: Tilton, John Kent
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 50
    Issue: 599
    Date: 1949-11
    Page Range: 241--247
    Publication Info: Lancaster, Pa Published for the Garden by the New Era Printing Co 1900-