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  1. By: Boas, Helene M.
    Type: Article
    In: Memoirs of the Torrey Botanical Club
    Volume: 17
    Date: 1918
    Page Range: 207--209
    Publication Info: Durham, N.C, Published for the Club by the Seeman Printery, 1889-
  2. By: Stout, A.B. (Arlow Burdette ) - Boas, Helene M.
    Type: Article
    In: Memoirs of the Torrey Botanical Club
    Volume: 17
    Issue: 2
    Date: 1918
    Page Range: 334--458
    Publication Info: Durham, N.C, Published for the Club by the Seeman Printery, 1889-