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Botrychium virginianum previously known as: Botrychium virginianum var. europaeum, Botrypus virginianus, Osmunda virginiana Osmunda Osmunda claytoniana previously known as: Claytosmunda claytoniana, Osmundastrum claytoniana Osmunda regalis Osmunda spectabilis previously known as: Osmunda regalis var. spectabilis Osmundastrum cinnamomeum previously known as: Osmunda cinnamomea