Parnassia palustris, commonly called marsh grass of Parnassus, northern grass-of-Parnassus, or just grass-of-Parnassus, and bog-star, is a species of the genus Parnassia. It is the county flower of Cumbria and Sutherland in the United Kingdom, and appears on the county arms of the former county. The name comes from ancient Greece: evidently the cattle on Mount Parnassus appreciated the plant; hence it was an "honorary grass".