| Noun | 1. | genus Parnassia - genus of bog herbs of Arctic and northern temperate regions rosid dicot genus - a genus of dicotyledonous plants family Saxifragaceae, Saxifragaceae, saxifrage family - a large and diverse family of evergreen or deciduous herbs; widely distributed in northern temperate and cold regions; sometimes includes genera of the family Hydrangeaceae grass-of-Parnassus, parnassia - any of various usually evergreen bog plants of the genus Parnassia having broad smooth basal leaves and a single pale flower resembling a buttercup bog star, Parnassia palustris - plant having ovate leaves in a basal rosette and white starlike flowers netted with green fringed grass of Parnassus, Parnassia fimbriata - bog plant with broadly heart-shaped basal leaves and cream-colored or white saucer-shaped flowers with fringed petals; west of Rocky Mountains from Alaska to New Mexico |