Perideridia parishii subsp. parishii
Parish's yampah, Parish's Yampah
Photo: parent species Perideridia parishii · no rights reserved · CC0
Family: Apiaceae · Type: Herb · Native
Conservation status: CNPS 2B.2
Perideridia parishii subsp. parishii (Parish's yampah) is a native California herb in the Apiaceae family, recognized by concave umbels vs flat umbels diagnostic.
Parish's yampah is a rare (CNPS 2B.2) California native perennial found in the Southern Transverse Ranges in damp meadows at elevations of 2,000 to 3,000 meters. Flowering from June to August, this plant produces small white flowers in delicate umbels with 6 to 11 unequal rays arranged in a concave shape. Growing to 30 to 60 centimeters tall with slender, branching stems emerging from a fibrous root system. Its leaves are finely divided, creating a delicate, feathery appearance with narrow, thread-like segments. The fruit is small, measuring 3 to 5 millimeters long, with an oblong to slightly ovate shape.
Identification and appearance
Key characters: 2 sympatric species; concave umbels vs flat umbels diagnostic
Habitat and range
Habitat: Damp meadows
Elevation: 2000-3000 m
California counties: San Bernardino, Fresno, Tulare, Sierra, Kern, Mono, Trinity, El Dorado
Outside California: Arizona, New Mexico
Bloom period
Perideridia parishii subsp. parishii blooms Jun-Aug.
Conservation status
CNPS 2B.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 parishii subsp. parishii native to California?
Yes. Perideridia parishii subsp. parishii is native to California (recorded as native).
When does Perideridia parishii subsp. parishii bloom?
Perideridia parishii subsp. parishii blooms Jun-Aug.
Where in California does Perideridia parishii subsp. parishii grow?
Perideridia parishii subsp. parishii occurs in San Bernardino, Fresno, Tulare, Sierra, Kern, Mono, Trinity, El Dorado, at elevations of 2000-3000 m.
What plant family does Perideridia parishii subsp. parishii belong to?
Perideridia parishii subsp. parishii is in the Apiaceae family, genus Perideridia.
Is Perideridia parishii subsp. parishii rare or endangered?
Perideridia parishii subsp. parishii carries California Rare Plant Rank 2B.2, state rank S2.
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.