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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Parnell, Dennis R
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 20
    Date: 1970
    Page Range: 321--323
    Publication Info: Berkeley, California Botanical Society,
  2. By: Brophy, William B. (William Brent), - Parnell, Dennis R
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 22
    Date: 1974
    Page Range: 290--302
    Publication Info: Berkeley, California Botanical Society,
  3. By: Raven, Peter H - Parnell, Dennis R
    Type: Article
    In: Annals of the Missouri Botanical Garden
    Volume: 64
    Date: 1977
    Page Range: 642--643
    Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-
  4. By: Raven, Peter H - Parnell, Dennis R
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 20
    Date: 1970
    Page Range: 246--249
    Publication Info: Berkeley, California Botanical Society,