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By: Mclean, Forman T - Merrill, Elmer D. (Elmer Drew), - Rusby, H H - Small, J K - Britton, Nathaniel Lord, - Trelease, Helen M - Haynes, Caroline CType: ArticleIn: TorreyaVolume: 32Series:Issue: 1Date: 1932Page Range: 18--27Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945Subjects: