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By: Piper, Charles V. (Charles Vancouver), - Newbold, Patty Thum - Cockerell, Theodore D. A. (Theodore Dru Alison),Type: ArticleIn: TorreyaVolume: 24Series:Issue: 1Date: 1924Page Range: 7--11Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945Subjects: