Distribution: Occurring east of the Cascades crest in south-central Washington; south-central Washington to adjacent Oregon.
Habitat: Crevices is basalt cliffs.
Flowers: April
Origin: Native
Growth Duration: Perennial
Conservation Status: Threatened in Washington (WANHP)
Pollination: Bees, flies, butterflies, beetles, wasps
Glabrous perennial from a stout taproot and branching, woody base, 2.5-4 dm. tall.
Leaves basal, ternate-pinnately dissected into linear segments 1-2 mm. wide and 1-3 cm. long.
Inflorescence a compound umbel, the rays unequal, 3-5 cm. long; involucre none; involucel wanting or inconspicuous; pedicels 4-10 mm. long; calyx teeth obsolete; flowers yellow.
Fruit glabrous, elliptic, 7-12 mm. long, the wings to wholly as wide as the body.
Publication: Contr. U.S. Natl. Herb. 7(1): 225. 1900.
PNW Herbaria: Specimen records of Lomatium laevigatum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Lomatium laevigatum checklist entry
OregonFlora: Lomatium laevigatum information
E-Flora BC: Lomatium laevigatum atlas page
CalPhotos: Lomatium laevigatum photos
