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  1. By: Birch, Edward O.
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 51
    Issue: 605
    Date: 1950-05
    Page Range: 115--118
    Publication Info: Lancaster, Pa, Published for the Garden by the New Era Printing Co, 1900-
  2. By: Birch, Edward O.
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 45
    Issue: 532
    Date: 1944-04
    Page Range: 88--91
    Publication Info: Lancaster, Pa, Published for the Garden by the New Era Printing Co, 1900-