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  1. By: Clapp, Grace L
    Type: Article
    In: Botanical gazette
    Volume: 54
    Issue: 3
    Date: 1912
    Page Range: 177--193
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991
  2. By: Clapp, Grace L
    Type: Article
    In: Botanical gazette
    Volume: 50
    Issue: 5
    Date: 1910
    Page Range: 386--389
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991
  3. By: Clapp, Grace L
    Type: Article
    In: Torreya
    Volume: 40
    Issue: 2
    Date: 1940
    Page Range: 29--31
    Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945