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By: Humphrey, Robert RType: ArticleIn: Madroño; a West American journal of botanyVolume: 3Series:Issue:Date: 1936Page Range: 348--352Publication Info: Berkeley California Botanical SocietySubjects:
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By: Humphrey, Robert RType: ArticleIn: TorreyaVolume: 31Series:Issue: 4Date: 1931Page Range: 101--109Publication Info: Burlington, Vt, Torrey Botanical Club, 1901-1945Subjects: