dcsimg
Please read BHL's Acknowledgment of Harmful Content
Sort By:
  1. By: Bierhorst, David W
    Type: Article
    In: American fern journal
    Volume: 64
    Date: 1974
    Page Range: 18--26
    Publication Info: [Washington, etc.] American Fern Society
  2. By: Bierhorst, David W
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 61
    Date: 1974
    Page Range: 408--426
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-