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  1. By: Robbins, Christine Chapman
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 45
    Issue: 531
    Date: 1944-03
    Page Range: 54--66
    Publication Info: Lancaster, Pa, Published for the Garden by the New Era Printing Co, 1900-
  2. By: Robbins, Christine Chapman
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 50
    Issue: 598
    Date: 1949-10
    Page Range: 230--235
    Publication Info: Lancaster, Pa, Published for the Garden by the New Era Printing Co, 1900-