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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Hays, John
    Type: Article
    In: Phytologia
    Volume: 78
    Date: 1995
    Page Range: 264--276
    Publication Info: Bronx Park, New York H.A. Gleason and H.N. Moldenke
  2. By: Keith, Eric L - Hays, John
    Type: Article
    In: SIDA, contributions to botany
    Volume: 20
    Date: 2003
    Page Range: 1321--1322
    Publication Info: [Dallas, W. F. Mahler, etc.], 1962-