(Note: In Oregon, this genus has recently been placed into the Parnassiaceae while in Washington it has been placed into the Celastraceae)
Cascade Grass-of-Parnassus, Fringed Grass-of-Parnassus: Parnassia cirrata var. intermedia (Synonyms: Parnassia fimbriata var. hoodiana, Parnassia fimbriata var. intermedia, Parnassia intermedia)
Fringed Grass-of-Parnassus: Parnassia fimbriata (Synonym: Parnassia fimbriata var. fimbriata) -
kotzebue's Grass-of-Parnassus: Parnassia kotzebuei (Synonym: Parnassia kotzebuei var. pumila) -
California Grass-of-Parnassus, Northern Grass-of-Parnassus: Parnassia palustris (Synonyms: Parnassia californica, Parnassia multiseta, Parnassia palustris ssp. neogaea, Parnassia palustris var. californica, Parnassia palustris var. montanensis, Parnassia palulstris var. neogaea, Parnassia palustris var. tenuis) -