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By: Jahns, Hans Martin, - Mackenzie, Elke - Weber, William A. (William Alfred), - Huneck, Siegfried,Type: ArticleIn: Occasional papers of the Farlow Herbarium of Cryptogamic BotanyVolume: 4Series:Issue:Date: 1972Page Range: 1--12Publication Info: Cambridge, Mass, Harvard University, Farlow Herbarium of Cryptogamic Botany,Subjects: