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By: Kurz, H - Kubitzki, Klaus, - Richter, H GType: ArticleIn: Journal of the Arnold ArboretumVolume: 60Series:Issue: 4Date: 1979Page Range: 515--522Publication Info: Cambridge, Mass Arnold Arboretum, Harvard University [etc.] 1919-Subjects:
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By: Werff, Henk van der - Richter, H GType: ArticleIn: Annals of the Missouri Botanical GardenVolume: 83Series:Issue:Date: 1996Page Range: 409--418Publication Info: St. Louis, Missouri Botanical Garden Press, 1914-Subjects: