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  1. By: Ferry, Ervin S.
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 50
    Issue: 589
    Date: 1949-01
    Page Range: 8--15
    Publication Info: Lancaster, Pa, Published for the Garden by the New Era Printing Co, 1900-
  2. By: Ferry, Ervin S.
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 50
    Issue: 590
    Date: 1949-02
    Page Range: 25--33
    Publication Info: Lancaster, Pa, Published for the Garden by the New Era Printing Co, 1900-