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By: Small, John A - Smiley, Daniel, - Melo-Costa, Wanessa de - Zimmerman, P W - Matzke, Edwin B - Thomson, John Walter, - Medsger, Oliver Perry - Bold, Harold C - Ashwell, Elizabeth - Copeland, Joseph JType: ArticleIn: TorreyaVolume: 41Series:Issue: 4Date: 1941Page Range: 135--142Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945Subjects: