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  1. By: Roberts, Edith A
    Type: Article
    In: Botanical gazette
    Volume: 60
    Issue: 5
    Date: 1915
    Page Range: 406--411
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991
  2. By: Roberts, Edith A
    Type: Article
    In: Botanical gazette
    Volume: 58
    Issue: 5
    Date: 1914
    Page Range: 432--444
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991