Perideridia gairdneri subsp. borealis

Family: Apiaceae · Type: perennial · Native

Northern gairdner's yampah is a California native perennial found in the Klamath Ranges, northern Coast Ranges, and Warner Mountains in moist meadows, flats, and streamside habitats at elevations below 3,000 meters. Flowering from June to August, this plant produces white flowers in umbels with generally 11 to 16 rays. Growing with a rigid stem and clustered tuberous roots less than 15 millimeters wide, it develops compact underground structures that support its growth. Its leaves are finely divided, typical of the carrot family, creating delicate, lacy foliage that complements its slender flowering structure. The plant's petals are distinctively marked with 5 or 7 prominent veins, adding subtle complexity to its simple white flowers.

Habitat: Generally moist soil of flats, meadows, streamsides

Bloom period: Jun-Aug

Elevation: < 3000 m

Bioregions: KR, NCoRH, Wrn

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.