Lomatium hallii
Hall's lomatium
(c) Alex Abair, some rights reserved (CC BY) · licence
Family: Apiaceae · Type: Herb · Native
Lomatium hallii (Hall's lomatium) is a native California herb in the Apiaceae family, recognized by . Coastal northern California endemic.
Hall's lomatium is a native perennial found in the northwestern Klamath Ranges of Del Norte County on rocky bluffs or slopes at approximately 150 meters elevation. Flowering from May to August, this plant produces bright yellow flowers in compound umbels with 8 to 18 spreading rays. Growing 20 to 50 centimeters tall with a stout taproot and several branching stems, it develops a complex leaf structure with finely dissected segments. Its leaves are 5 to 15 centimeters long, oblong-ovate, intricately 3-pinnately divided into narrow linear to oblong segments that are 2 to 4 millimeters long. The fruit is an oblong-ovate structure 5 to 9 millimeters long with wings approximately half the width of its body.
Identification and appearance
Key characters: Geographically isolated. Coastal northern California endemic
Habitat and range
Habitat: Rocky bluffs or slopes
Elevation: +- 150 m.
California counties: Del Norte, Sonoma, Modoc, Shasta
Outside California: Oregon
Bloom period
Lomatium hallii blooms May-Aug.
How to tell it apart
vs Tauschia: Lomatium fruits have prominent marginal wings; Tauschia fruits lack wings or have only slight ribs.; vs Sanicula: Lomatium has typical umbrella-shaped flower clusters; Sanicula has dense ball-like flower heads with hooked bristles.; vs Cymopterus: Lomatium grows upright with a stem; Cymopterus is stemless and grows flat to the ground.; vs Conium: Lomatium grows in dry natural habitats; Conium has purple-spotted stems and grows in moist disturbed areas.; vs Daucus: Lomatium fruits are flat with thin wings; Daucus fruits are cylindrical with spiny bristles.
Frequently asked questions
Is Lomatium hallii native to California?
Yes. Lomatium hallii is native to California (recorded as native).
When does Lomatium hallii bloom?
Lomatium hallii blooms May-Aug.
Where in California does Lomatium hallii grow?
Lomatium hallii occurs in Del Norte, Sonoma, Modoc, Shasta, at elevations of +- 150 m..
What plant family does Lomatium hallii belong to?
Lomatium hallii is in the Apiaceae family, genus Lomatium.
What habitat does Lomatium hallii grow in?
Lomatium hallii grows in Rocky bluffs or slopes.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · Index of California Plant Names · CalPhotos
Last updated 2026-10-07
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.