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Organism
  Plantae
   Viridiplantae
     Streptophyta
     Embryophyta
      Tracheophyta
        Spermatophytina
            Magnoliopsida
                  Rosanae
                    Celastrales
                           [Brexiales]
                           [Parnassiales]
                           [Stackhousiales]
                            Parnassiaceae
                                     Parnassia
                                             Parnassia asarifolia
                                             Parnassia caroliniana
                                                   [Parnassia floridana]
                                             Parnassia cirrata
                                               Parnassia cirrata var. cirrata
                                               Parnassia cirrata var. intermedia
                                                     [Parnassia fimbriata var. intermedia]
                                                     [Parnassia intermedia]
                                             Parnassia cordata
                                             Parnassia crassifolia
                                             Parnassia farreri
                                             Parnassia fimbriata
                                                   [Parnassia fimbriata var. fimbriata]
                                                   [Parnassia fimbriata var. hoodiana]
                                             Parnassia glauca
                                                   [Parnassia americana]
                                             Parnassia grandifolia
                                             Parnassia kotzebuei
                                                   [Parnassia kotzebuei var. pumila]
                                             Parnassia palustris
                                                   [Parnassia californica]
                                                   [Parnassia montanensis]
                                                   [Parnassia multiseta]
                                                   [Parnassia palustris subsp. neogaea]
                                                   [Parnassia palustris var. californica]
                                                   [Parnassia palustris var. montanensis]
                                                   [Parnassia palustris var. neogaea]
                                                   [Parnassia palustris var. palustris]
                                                   [Parnassia palustris var. tenuis]
                                             Parnassia parviflora
                                                   [Parnassia palustris var. parviflora]
                                             Parnassia scaposa
                                             Parnassia tenella
                                             Parnassia townsendii
                                                   [Parnassia mexicana]
                                             Parnassia wightiana