Eryngium articulatum
Beethistle, Beethistle
(c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda · licence
Family: Apiaceae · Type: Herb · Native
Eryngium articulatum (Beethistle) is a native California herb in the Apiaceae family, recognized by flower color completely diagnostic.
Beethistle is a California native perennial found in the Klamath Ranges, northern Coast Ranges, Cascade Range, and Sacramento Valley in seasonally wet areas on lake and stream margins at elevations below 1,800 meters. Flowering from June to August, this plant produces bright blue or purple flowers in dense ovoid heads 1 to 2.5 centimeters long with blue-tinged sepals. Growing with stout, erect stems 30 to 120 centimeters tall that branch 2 to 5 centimeters above the basal rosette, it develops a distinctive architectural form. Its lanceolate to narrowly ovate leaves are 5 to 10 centimeters long with coarsely sharp-serrate edges, creating a striking structural appearance. The fruit is characterized by dense lanceolate scales with club-shaped papillae, giving the plant a unique texture.
Identification and appearance
Key characters: 7 sympatric species; flower color completely diagnostic
Habitat and range
Habitat: Seasonally wet areas on lake and stream margins, marshes
Elevation: < 1800 m
California counties: Tehama, Modoc, Shasta, Glenn, Siskiyou, Butte, Trinity, Solano, Humboldt, Lassen, Plumas, Contra Costa, Napa, Sutter, Sacramento
Outside California: to Washington, Idaho
Bloom period
Eryngium articulatum blooms Jun-Aug.
How to tell it apart
vs Navarretia: Eryngium has compact button-like heads; Navarretia has looser clusters with spine-tipped bracts radiating outward.; vs Dipsacus: Eryngium flower heads are round or cylindrical when young; teasel heads are elongated egg-shaped from the start.; vs Cirsium: Eryngium leaves are firm and waxy; thistle leaves are softer with white woolly undersides.; vs Plantago: Eryngium grows in wetlands with spiny bracts under each flower; plantain has ribbed leaves and lacks spiny bracts.; vs Sanicula: Eryngium has a single bract under each flower and a thistle-like appearance; Sanicula lacks individual bracts.
Frequently asked questions
Is Eryngium articulatum native to California?
Yes. Eryngium articulatum is native to California (recorded as native).
When does Eryngium articulatum bloom?
Eryngium articulatum blooms Jun-Aug.
Where in California does Eryngium articulatum grow?
Eryngium articulatum occurs in Tehama, Modoc, Shasta, Glenn, Siskiyou, Butte, Trinity, Solano and other counties, at elevations of < 1800 m.
What plant family does Eryngium articulatum belong to?
Eryngium articulatum is in the Apiaceae family, genus Eryngium.
What habitat does Eryngium articulatum grow in?
Eryngium articulatum grows in Seasonally wet areas on lake and stream margins, marshes.
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.