Lomatium repostum
Napa lomatium, Napa Lomatium
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Family: Apiaceae · Type: Herb · Native
Conservation status: CNPS 4.2
Lomatium repostum (Napa lomatium) is a native California herb in the Apiaceae family, recognized by glaucous herbage, large serrate leaflets, and wide fruit wings.
Napa lomatium is a rare (CNPS 4.2) California native perennial found in southern North Coast Ranges in pine/oak woodland and chaparral, often on serpentine landscapes at elevations of 100 to 800 meters. Flowering from April to May, this plant produces green-yellow or purple flowers in complex umbels with 8 to 20 spreading rays. Growing low to the ground with a slender taproot, the plant reaches 12 to 50 centimeters tall with leaves clustered entirely at the base. Its leaves are broadly triangular to ovate, 5 to 15 centimeters wide, divided into 1 to 2 ternate segments with leaflets that are sharply serrate and occasionally lobed. The fruit is widely oblong, 8 to 12 millimeters long, with wings wider than the seed body.
Identification and appearance
Key characters: 18 sympatric species; distinguished by glaucous herbage, large serrate leaflets, and wide fruit wings
Habitat and range
Habitat: Pine/oak woodland, chaparral, generally serpentine
Elevation: 100-800 m
California counties: Solano, Sonoma, Napa, Lake
Bloom period
Lomatium repostum blooms Apr-May.
Conservation status
CNPS 4.2
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 repostum native to California?
Yes. Lomatium repostum is native to California (recorded as native).
When does Lomatium repostum bloom?
Lomatium repostum blooms Apr-May.
Where in California does Lomatium repostum grow?
Lomatium repostum occurs in Solano, Sonoma, Napa, Lake, at elevations of 100-800 m.
What plant family does Lomatium repostum belong to?
Lomatium repostum is in the Apiaceae family, genus Lomatium.
Is Lomatium repostum rare or endangered?
Lomatium repostum carries California Rare Plant Rank 4.2, state rank S3.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · CNPS Rare Plant Inventory · Index of California Plant Names · 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.