Perideridia parishii subsp. latifolia
Photo: parent species Perideridia parishii · no rights reserved · CC0
Family: Apiaceae · Type: Herb · Native
Perideridia parishii subsp. latifolia is a native California herb in the Apiaceae family, recognized by flat umbels and broad fruits distinguish from subsp. parishii.
Parish's yampah is a California native perennial found in the Klamath Ranges, Cascade Range, Sierra Nevada, Transverse Ranges, Peninsular Ranges, and southeastern Sierra Nevada in wet meadows and open conifer forests at elevations of 2,000 to 3,400 meters. Flowering from June to August, this plant produces delicate white umbel flowers in flat to slightly convex clusters. Growing with slender stems up to 60 centimeters tall, it develops multiple branching rays generally 12 to 14 in number. Its leaves are finely divided with narrow, thread-like segments typical of the carrot family. The fruit is small, ovate to nearly round, measuring 1.8 to 3.5 millimeters long.
Identification and appearance
Key characters: 9 sympatric species; flat umbels and broad fruits distinguish from subsp. parishii
Habitat and range
Habitat: Wet meadows, open conifer forests
Elevation: 2000-3400 m
Outside California: Nevada
Bloom period
Perideridia parishii subsp. latifolia blooms Jun-Aug.
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. latifolia native to California?
Yes. Perideridia parishii subsp. latifolia is native to California (recorded as native).
When does Perideridia parishii subsp. latifolia bloom?
Perideridia parishii subsp. latifolia blooms Jun-Aug.
What plant family does Perideridia parishii subsp. latifolia belong to?
Perideridia parishii subsp. latifolia is in the Apiaceae family, genus Perideridia.
What habitat does Perideridia parishii subsp. latifolia grow in?
Perideridia parishii subsp. latifolia grows in Wet meadows, open conifer forests.
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.