Lomatium triternatum

Lewis' lomatium

Family: Apiaceae · Type: perennial · Native

Lewis' lomatium is a California native perennial found in open grasslands, rocky slopes, and dry meadows at elevations of 100 to 2,000 meters. Flowering from March to May, this plant produces bright yellow flowers in broad, spreading umbels with 5 to 20 rays. Growing 15 to 100 centimeters tall with a prominent stem and a slender to massive taproot, it has delicate, finely soft-hairy foliage. Its leaves are complex, with intricate 1 to 2 times ternate-pinnate divisions, featuring linear to lance-ovate leaflets 1.5 to 20 centimeters long. The fruit is an elongated structure 6 to 22 millimeters long, with wings typically narrower than the fruit body.

California counties: Modoc, Del Norte, Butte, Trinity, Lassen, Siskiyou, Mendocino, Humboldt, Shasta, Nevada, Colusa, Mariposa, Kern, Inyo, Santa Barbara

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