Page author: Walter Siegmund
Lomatium dissectum
fern-leaved desert parsley
WTU specimens
Other herbaria

Distribution: Chiefly west of the east base of the Cascades, British Columbia to California

Habitat: Open areas from the foothills to moderate elevations in the mountains

Flowers: April - June

Origin: Native

Conservation Status: Not of concern


Robust perennial from a very large, woody taproot, the several ascending, glabrous stems 5-15 dm. tall.


Both basal and cauline leaves large and somewhat roughened, ternate-pinnately dissected into small, narrow ultimate segments up to 1 cm. long.


Inflorescence a compound umbel, the rays 10-30, usually about equal, 4-10 cm. long at maturity; involucre none; involucel of well-developed narrow bractlets; calyx teeth obsolete; flowers brownish-purple or yellow (the two color forms rarely found together), some of them always sterile.


Fruit elliptic, 8-17 mm. long and 4.5-10 mm. wide, the lateral wings narrow and thickened, up to 1 mm. wide, the dorsal ribs inconspicuous.

Accepted Name:
Lomatium dissectum (Nutt.) Mathias & Constance

Synonyms & Misapplications:
Leptotaenia dissecta Nutt.
Leptotaenia foliosa var. dissecta
Lomatium dissectum (Nutt.) Mathias & Constance var. dissectum [HC, VPBC1]
Additional Resources:

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

WA Flora Checklist: Lomatium dissectum checklist entry.

E-Flora BC: Lomatium dissectum atlas page.

CalPhotos: Lomatium dissectum photos.

USDA Plants: Lomatium dissectum information.

93 photographs:
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