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  Plantae
      Charophyta
        Streptophytina
            Equisetopsida
              Polypodiidae
                    Osmundales
                            Osmundaceae
                                     Claytosmunda
                                             Claytosmunda claytoniana
                                                   [Osmunda monticola]
                                     Leptopteris
                                             Leptopteris superba
                                     Osmunda
                                             Osmunda acuta
                                                   [Osmunda regalis var. obtusifolia]
                                             Osmunda cinnamomea
                                                   Osmunda cinnamomea f. auriculata
                                                   Osmunda cinnamomea f. latipinnula
                                               Osmunda cinnamomea var. frondosa
                                               Osmunda cinnamomea var. imbricata
                                               Osmunda cinnamomea var. cinnamomea
                                               Osmunda cinnamomea var. glandulosa
                                             Osmunda claytonia
                                             Osmunda claytoniana
                                                   Osmunda claytoniana f. mackiana
                                               Osmunda claytoniana var. dubia
                                             Osmunda interrupta
                                             Osmunda japonica
                                                   [Osmunda speciosa]
                                             Osmunda regalis
                                                   Osmunda regalis f. orbiculata
                                               Osmunda regalis var. spectabilis
                                             Osmunda ruggii
                                             Osmunda spectabilis
                                                   [Osmunda gracilis]
                                             Osmunda ×ruggii
                                     Osmundastrum
                                             Osmundastrum cinnamomea
                                             Osmundastrum cinnamomeum
                                               Osmundastrum cinnamomeum subsp. cinnamomeum
                                                     [Osmunda cinnamomea f. crenulata]
                                                     [Osmunda cinnamomea f. incisa]
                                     Plenasium
                                             Plenasium javanicum
                                                   [Osmunda javanica]
                                             Plenasium vachellii
                                                   [Osmunda vachellii]
                                     Todea
                                             Todea barbara
                                             Todea hymenophylloides
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