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  1. By: Ackerman, James D - Chiron, Guy R
    Type: Article
    In: Richardiana.
    Volume: 1
    Issue: 2
    Date: 2001
    Page Range: 82--85
    Publication info: Saint-Genis-Laval [France] :Tropicalia,2001-
  2. By: Ackerman, James D
    Type: Article
    In: Madroño; a West American journal of botany.
    Volume: 23
    Date: 1975
    Page Range: 191--198
    Publication info: Berkeley,California Botanical Society.