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By: Towner, Howard FType: ArticleIn: Annals of the Missouri Botanical GardenVolume: 64Series:Issue:Date: 1977Page Range: 48--120Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-Subjects:
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By: Towner, Howard F - Raven, Peter HType: ArticleIn: Madroño; a West American journal of botanyVolume: 20Series:Issue:Date: 1970Page Range: 241--245Publication Info: Berkeley California Botanical SocietySubjects: