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  1. By: Straits, William J. - Gill, David S - Lowe, Andrew J.
    Type: Article
    In: Crossosoma
    Volume: 22
    Issue: 2
    Date: 1996
    Page Range: 59--64
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,
  2. By: Gill, David S - Hanlon, Barbara J
    Type: Article
    In: Madroño; a West American journal of botany
    Volume: 45
    Date: 1998
    Page Range: 141--145
    Publication Info: Berkeley, California Botanical Society,