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By: Mclean, Forman T - Howe, Marshall A. (Marshall Avery), - Harper, Robert A - Graham, Margaret A - Pady, S MType: ArticleIn: TorreyaVolume: 34Series:Issue: 3Date: 1934Page Range: 78--83Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945Subjects: