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Frederick Orpen Bower (born Nov. 4, 1855, Ripon, Yorkshire, Eng.—died April 11, 1948, Ripon) was an English botanist whose study of primitive land plants, especially the ferns, contributed greatly to a modern emphasis on the study of the origins and evolutionary development of these plants. He is best known for his interpolation theory explaining the evolution of the alternation of generations in the life cycles of plants—in which a vegetative, or asexual, sporophyte generation alternates...