Perideridia gairdneri

Gairdner's yampah

Family: Apiaceae · Type: perennial · Native

Gairdner's yampah is a California native perennial found in various bioregions in open grasslands and meadows at elevations up to 1,500 meters. Flowering from May to July, this plant produces white flowers in delicate umbel clusters with multiple small florets spreading in an ascending pattern. Growing with slender stems 30 to 140 centimeters tall, it develops distinctive fusiform roots clustered in groups of two or three. Its basal leaves are complex, featuring pinnate blades up to 35 centimeters long with linear or lanceolate leaflets that can reach 12 centimeters in length. The fruit is small and nearly round, approximately 3 millimeters in diameter with thread-like ribs.

California counties: Fresno, Inyo, San Luis Obispo, Los Angeles, Marin, Shasta, Tehama, Mendocino, Solano, Monterey, Santa Cruz, Madera, Tulare, Plumas, Siskiyou, Mariposa, Amador, San Bernardino, El Dorado, Humboldt, Glenn, Nevada, Sierra, Lassen, Tuolumne, Trinity, San Benito, Ventura, Alpine

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