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  1. By: Walters, Dirk R.
    Type: Article
    In: Crossosoma
    Volume: 15
    Issue: 3
    Date: 1989-06
    Page Range: 1--14
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,
  2. By: Walters, Dirk R.
    Type: Article
    In: Crossosoma
    Volume: 15
    Issue: 4
    Date: 1989-08
    Page Range: 1--10
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,