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  1. By: Pierce, John H
    Type: Article
    In: Journal of the New York Botanical Garden
    Volume: 43
    Issue: 515
    Date: 1942-11
    Page Range: 268--277
    Publication Info: Lancaster, Pa, Published for the Garden by the New Era Printing Co, 1900-
  2. By: Pierce, John H
    Type: Article
    In: Rhodora
    Volume: 38
    Date: 1936
    Page Range: 273--275
    Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]