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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Pennings, Steven C. - Callaway, Ragan M. (Ragan Morrison),
    Type: Article
    In: Crossosoma
    Volume: 17
    Issue: 6
    Date: 1991-12
    Page Range: 1--9
    Publication Info: Claremont, CA, Southern California Botanists, Rancho Santa Ana Botanic Garden,