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  1. By: McWhorter, Frank P.
    Type: Article
    In: Botanical gazette
    Volume: 72
    Issue: 5
    Date: 1921
    Page Range: 321--325
    Publication Info: Hanover, Ind, [publisher not identified], 1876-1991
  2. By: Ryan, Bruce D. - McWhorter, Frank P.
    Type: Article
    In: Evansia
    Volume: 3
    Issue: 1
    Date: 1986
    Page Range: 14--16
    Publication Info: Springfield, Mo American Bryological and Lichenological Society c1984-