Lomatium roseanum
Adobe lomatium
(c) Ken-ichi Ueda, some rights reserved (CC BY) · licence
Family: Apiaceae · Type: Herb · Native
Conservation status: CNPS 1B.2
Lomatium roseanum (Adobe lomatium) is a native California herb in the Apiaceae family, recognized by no sympatric species.
Adobe lomatium is a rare (CNPS 1B.2) California native perennial found in shrublands and lower montane conifer forest in gravelly, rocky openings at elevations of 1,463 to 2,255 meters. Flowering from May to July, this plant produces yellow flowers with purple anthers in delicate umbel clusters. Growing with a low-spreading habit, the plant reaches 12 to 23 centimeters tall and features a spheric underground tuber. Its ternate-dissected leaves are clustered at the base, with tiny elliptic to oblanceolate segments 1 to 4.5 millimeters long ending in acute tips. The fruit is an oblong to round structure 6 to 8 millimeters long with thin wings and distinctive oil tubes.
Identification and appearance
Key characters: Geographically isolated; no sympatric species
Habitat and range
Habitat: shrublands, lower montane conifer forest, gravelly, rocky openings
Elevation: 1463-2255 m
Outside California: to Oregon, Nevada
Bloom period
Lomatium roseanum blooms May-Jul.
Conservation status
CNPS 1B.2
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 roseanum native to California?
Yes. Lomatium roseanum is native to California (recorded as native).
When does Lomatium roseanum bloom?
Lomatium roseanum blooms May-Jul.
What plant family does Lomatium roseanum belong to?
Lomatium roseanum is in the Apiaceae family, genus Lomatium.
Is Lomatium roseanum rare or endangered?
Lomatium roseanum carries California Rare Plant Rank 1B.2, state rank S2.
What habitat does Lomatium roseanum grow in?
Lomatium roseanum grows in shrublands, lower montane conifer forest, gravelly, rocky openings.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CalPhotos · CDFW CNDDB
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.