Perideridia Gairdneri, or more commonly know as Gardner'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 4 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring and summer, blooms during mid spring, is tolerant of shade and is routinely available commercially. Perideridia Gairdneri or Gardner's Yampah's floral region is North America US Lower 48, specifically in the states of California, Colorado, Idaho, Montana, Nevada, Oregon, South Dakota, Utah, Washington and Wyoming.
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