Page authors: Don Knoke, David Giblin
Lomatium macrocarpum
large-fruit desert-parsley, bigseed lomatium

Distribution: Widely distributed east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains.

Habitat: Open, dry, rocky areas at low elevations.

Flowers: March-May

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bees, flies, butterflies, beetles, wasps


Puberulent perennial from a taproot and simple, subterranean crown, 1-3 dm. tall.


Leaves gray-green, basal, ternate-pinnately or merely pinnately dissected into segments up to 9 mm. long and 2 mm. wide. Taproot strongly thickened throughout, or slender above, elongate-tuberous below.


Inflorescence a compound umbel, the rays 2-6 cm. long at maturity; peduncles usually several from the base, ascending in flower and upright in fruit, 1-2.5 dm. long; involucre none; involucel of narrow, conspicuous, green bractlets, often surpassing the flowers; calyx teeth obsolete; flowers grayish-white or purplish-white, rarely yellowish; pedicels 1-11 mm. long.


Fruit narrow, oblong, 10-20 mm. long, glabrous to puberulent, the marginal wings narrow to fairly broad.

Accepted Name:
Lomatium macrocarpum (Nutt. ex Torr. & A. Gray) J.M. Coult. & Rose
Publication: Contr. U.S. Natl. Herb. 7(1): 217. 1900.

Synonyms & Misapplications:
Cogswellia macrocarpa (Nutt. ex Torr. & A. Gray) M.E. Jones
Ferula macrocarpa Hook. & Arn.
Lomatium flavum
Lomatium macrocarpum (Nutt. ex Torr. & A. Gray) J.M. Coult. & Rose var. artemisiarum Piper
Lomatium macrocarpum (Nutt. ex Torr. & A. Gray) J.M. Coult. & Rose var. ellipticum (Torr. & A. Gray) Jeps.
Peucedanum macrocarpum Nutt. ex Torr. & A. Gray
Additional Resources:

PNW Herbaria: Specimen records of Lomatium macrocarpum in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Lomatium macrocarpum checklist entry

OregonFlora: Lomatium macrocarpum information

E-Flora BC: Lomatium macrocarpum atlas page

CalPhotos: Lomatium macrocarpum photos

91 photographs:
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