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  1. By: Von Reis, Siri,
    Type: Article
    In: Botanical Museum leaflets, Harvard University
    Volume: 22
    Issue: 10
    Date: 1970-06-29
    Page Range: 333--343
    Publication Info: Cambridge, Mass Botanical Museum, Harvard University 1932-
  2. By: Von Reis, Siri,
    Type: Article
    In: Contributions from the Gray Herbarium of Harvard University
    Issue: 193
    Date: 1964
    Page Range: 3--65
    Publication Info: [Cambridge, Mass.] Harvard University -1984]