Perideridia Parishii, or more commonly know as Parish's Yampah, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) with green foliage and white flowers of the genus Perideridia. It has a moderate growth rate and a height of 2.5 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is summer, blooms during mid summer, is tolerant of shade and is routinely available commercially. Perideridia Parishii or Parish's Yampah's floral region is North America US Lower 48, specifically in the states of Arizona, California, New Mexico and Nevada.