Parnassia palustris, commonly known as marsh grass-of-Parnassus, is a perennial herb that commonly grows in bogs, fens, and wetlands. Some synonyms for this species include Parnassia caroliniana, Parnassia incrassata, Parnassia palustris var. elongata, and Parnassia palustris var. latifolia. This species is known for its delicate white flowers that bloom in late summer and early fall. The flowers have a unique appearance with five petals that are deeply divided, creating the illusion of ten petals. Parnassia palustris is an important plant in wetland ecosystems, providing food and habitat for a variety of insects and pollinators.