Perideridia gairdneri subsp. gairdneri

Gairdner's yampah, Gairdner's Yampah

Family: Apiaceae · Type: perennial · Native

Conservation status: CNPS 4.2

Gairdner's yampah is a California native perennial herb found in southern North Coast, North Coast Ranges, and southern California coastal regions in coastal flats, grassland, and pine forest at elevations below 350 meters. Flowering from June to July, this plant produces white flowers in umbels with generally 7 to 14 rays. Growing with a flexible stem and a single tuberous root 10 to 15 millimeters wide, it forms an elegant herbaceous structure. Its leaves are delicate and finely divided, typical of the carrot family, supporting its slender growth habit. The plant's single tuberous root and white flower clusters make it a distinctive component of coastal and grassland ecosystems.

Habitat: Coastal flats, grassland, pine forest

Bloom period: Jun-Jul

Elevation: < 350 m

Bioregions: s NCo (Sonoma Co.), NCoRO, NCoRI, CCo (scarce s of Monterey Co.), SCo.

California counties: San Diego, Sonoma, San Luis Obispo, Trinity, Santa Cruz, San Mateo, Monterey, Siskiyou, Orange, Solano, Napa, Alameda, Butte, Fresno, Los Angeles, Mendocino, Plumas, Santa Clara, Sierra, Sutter, Tulare, Tuolumne, Yuba, Marin, Humboldt, Lassen, Tehama, San Benito, Modoc

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