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  1. By: Majure, Lucas - Judd, Walter S. - Soltis, Pamela S - Soltis, Doug
    Type: Article
    In: Comparative cytogenetics : international journal of plant & animal cytogenetics, karyosystematics and molecular systematics
    Volume: 6
    Issue: 1
    Date: 2012
    Page Range: 53-77
    Publication Info: St. Petersburg, Russia [Published] with technical support of Zoological Institute RAS [2007]-
    Subjects: Cactaceae  Chromosome numbers  Opuntia humifusa  Opuntia macrorhiza  Pleistocene refugia  polyploid complex  polyploidy