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  1. By: Nelson, T W - Patterson, R
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 32
    Date: 1985
    Page Range: 102--105
    Publication Info: Berkeley, California Botanical Society,
  2. By: Patterson, R
    Type: Article
    In: The Annals and magazine of natural history; zoology, botany, and geology
    Volume: 10
    Date: 1842
    Page Range: 6--9
    Publication Info: London Taylor and Francis, Ltd