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By: Pilz, George EType: ArticleIn: Annals of the Missouri Botanical GardenVolume: 68Series:Issue:Date: 1981Page Range: 172--203Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-Subjects:
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By: Pilz, George EType: ArticleIn: Madroño; a West American journal of botanyVolume: 25Series:Issue:Date: 1978Page Range: 113--132Publication Info: Berkeley California Botanical SocietySubjects: