Perideridia bolanderi subsp. involucrata
Photo: parent species Perideridia bolanderi · (c) Matt Lavin, some rights reserved (CC BY) · licence
Family: Apiaceae · Type: Herb · Native
Perideridia bolanderi subsp. involucrata is a native California herb in the Apiaceae family, recognized by distinctive glaucous appearance.
Bolander's yampah is a California native perennial found in northern and central Sierra Nevada foothills in blue oak woodland at elevations of 90 to 1,000 meters. Flowering from June to August, this plant produces delicate white flowers in compact umbels with 18 to 25 individual blossoms. Growing 40 to 90 centimeters tall with a glaucous (bluish-gray) appearance, it develops slender, upright stems. Its leaves feature narrow, linear segments less than one millimeter wide, typically 0.6 to 6 centimeters long, with terminal segments matching the size and form of lateral segments. The umbels are distinctive, with lance-linear bracts that have wide, persistent scarious (papery) margins.
Identification and appearance
Key characters: Geographically isolated; distinctive glaucous appearance
Habitat and range
Habitat: Blue-oak woodland, in summer-dry clay soil
Elevation: 90-1000 m
Bloom period
Perideridia bolanderi subsp. involucrata 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 bolanderi subsp. involucrata native to California?
Yes. Perideridia bolanderi subsp. involucrata is native to California (recorded as native).
When does Perideridia bolanderi subsp. involucrata bloom?
Perideridia bolanderi subsp. involucrata blooms Jun-Aug.
What plant family does Perideridia bolanderi subsp. involucrata belong to?
Perideridia bolanderi subsp. involucrata is in the Apiaceae family, genus Perideridia.
What habitat does Perideridia bolanderi subsp. involucrata grow in?
Perideridia bolanderi subsp. involucrata grows in Blue-oak woodland, in summer-dry clay soil.
Related species
Other California species in the same genus, family, or bioregion.
Sources: Jepson eFlora · 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.