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Organism
  Plantae
            Polypodiopsida
                    Polypodiales
                            Pteridaceae
                              Cheilanthoideae
                                     Adiantopsis
                                             Adiantopsis dichotoma
                                                   [Cheilanthes dichotoma]
                                     Aspidotis
                                             Aspidotis californica
                                                   [Cheilanthes californica]
                                             Aspidotis densa
                                                   [Cheilanthes siliquosa]
                                     Cheilanthes
                                             Cheilanthes eckloniana
                                             Cheilanthes lanosa
                                             Cheilanthes mathewsii
                                                   [Cheilanthes pruinata]
                                             Cheilanthes microphylla
                                             Cheilanthes viridis
                                                   [Pellaea viridis]
                                     Myriopteris
                                             Myriopteris alabamensis
                                             Myriopteris lanosa
                                             Myriopteris microphylla
                                             Myriopteris tomentosa
                                                   [Cheilanthes tomentosa]
                                     Pellaea
                                             Pellaea atropurpurea
                                             Pellaea brachyptera
                                             Pellaea glabella
                                             Pellaea ovata
                                                   [Pellaea flexuosa]
                                             Pellaea ternifolia
                                             Pellaea viridis
                                     Pentagramma
                                             Pentagramma triangularis
                                               Pentagramma triangularis subsp. triangularis
                                                     [Pityrogramma triangularis]
                              Cryptogrammoideae
                                     Coniogramme
                                             Coniogramme fraxinea
                                     Cryptogramma
                                             Cryptogramma crispa
                              Parkerioideae
                                     Acrostichum
                                             Acrostichum aureum
                                             Acrostichum danaeifolium
                                                   [Acrostichum excelsum]
                                     Ceratopteris
                                             Ceratopteris pteridoides
                                             Ceratopteris richardii
                                                   [Ceratopteris deltoidea]
                                             Ceratopteris thalictroides
                              Pteridoideae
                                     Onychium
                                             Onychium japonicum
                                     Pityrogramma
                                             Pityrogramma calomelanos
                                             Pityrogramma trifoliata
                                                   [Trismeria trifoliata]
                                     Pteris
                                             Pteris bahamensis
                                                   [Pteris longifolia var. bahamensis]
                                                   [Pycnodoria pinetorum]
                                             Pteris caudata
                                             Pteris cretica
                                               Pteris cretica var. cretica
                                             Pteris ensiformis
                                             Pteris grandifolia
                                             Pteris longifolia
                                             Pteris multifida
                                             Pteris parkeri
                                                   [Pteris cretica var. albolineata]
                                             Pteris quadriaurita
                                             Pteris tripartita
                                                   [Litobrochia tripartita]
                                             Pteris vittata
                                             Pteris x delchampsii
                                     Taenitis
                                             Taenitis blechnoides
                              Vittarioideae
                                     Adiantum
                                             Adiantum anceps
                                             Adiantum capillus-veneris
                                             Adiantum caudatum
                                             Adiantum cultratum
                                             Adiantum cuneatum
                                             Adiantum hispidulum
                                             Adiantum latifolium
                                             Adiantum lucidum
                                             Adiantum melanoleucum
                                             Adiantum pedatum
                                             Adiantum peruvianum
                                             Adiantum tenerum
                                             Adiantum trapeziforme
                                             Adiantum villosum
                                     Haplopteris
                                             Haplopteris elongata
                                                   [Vittaria elongata]
                                     Vittaria
                                             Vittaria lineata