Perideridia bacigalupii
Bacigalupi's yampah
Family: Apiaceae · Type: Herb · Native
Conservation status: CNPS 4.2
Perideridia bacigalupii (Bacigalupi's yampah) is a native California herb in the Apiaceae family, recognized by no sympatric species.
Bacigalupi's yampah is a California native perennial ranked 4.2 by CNPS, found in northern and central Sierra Nevada Foothills in chaparral and pine woodland at elevations of 450 to 1,000 meters. Flowering from June to August, this plant produces white flowers in delicate umbels with 4 to 7 rays spreading in a loose, spherical arrangement. Growing 50 to 170 centimeters tall with tuberous roots clustered in groups of 2 to 6, it develops a robust, branching form. Its basal leaves are large and broadly ovate, typically two-pinnate with lance-linear leaflets 2 to 15 centimeters long, creating a feathery, intricate foliage pattern. The fruit is a small, oblong structure approximately 4 to 6 millimeters long with thread-like ribs.
Identification and appearance
Key characters: Geographically isolated; no sympatric species
Habitat and range
Habitat: Chaparral, pine woodland
Elevation: 450-1000 m
California counties: Mariposa, Amador, Butte, Madera, Nevada, Tuolumne, Yuba, Fresno, El Dorado, Calaveras
Bloom period
Perideridia bacigalupii blooms Jun-Aug.
Conservation status
CNPS 4.2
How to tell it apart
vs Ligusticum: Perideridia grows from tubers in grasslands; Ligusticum grows from taproots in mountain forests.; vs Daucus: Perideridia fruits are rounded with thin ribs; Daucus fruits are bristly and form a bird's-nest cluster.; vs Eriogonum: Eriogonum is in the buckwheat family with papery flowers; Perideridia has carrot-family umbels.; vs Angelica: Perideridia has small rounded fruits; Angelica has large flattened fruits with broad wings.; vs Achillea: Achillea is in the sunflower family with flat-topped flower heads; Perideridia has carrot-family umbels.
Frequently asked questions
Is Perideridia bacigalupii native to California?
Yes. Perideridia bacigalupii is native to California (recorded as native).
When does Perideridia bacigalupii bloom?
Perideridia bacigalupii blooms Jun-Aug.
Where in California does Perideridia bacigalupii grow?
Perideridia bacigalupii occurs in Mariposa, Amador, Butte, Madera, Nevada, Tuolumne, Yuba, Fresno and other counties, at elevations of 450-1000 m.
What plant family does Perideridia bacigalupii belong to?
Perideridia bacigalupii is in the Apiaceae family, genus Perideridia.
Is Perideridia bacigalupii rare or endangered?
Perideridia bacigalupii 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.