Blepharizonia sp.
Big tarweed, Big Tarweed
(c) Ken-ichi Ueda, some rights reserved (CC BY), uploaded by Ken-ichi Ueda · licence
Family: Asteraceae · Type: Annual · Variable; species dependent
Blepharizonia sp. (Big tarweed) is a non-native California annual in the Asteraceae family.
How to tell it apart
vs Hemizonia: Blepharizonia ray fruits are hairy; Hemizonia ray fruits are completely smooth.; vs Holocarpha: Blepharizonia lacks pit-gland-tipped bracts on flower stalks; Holocarpha has distinctive pit glands.; vs Deinandra: Blepharizonia has paleae only at disk edge; Deinandra (if annual) also edge-only but ray fruits differ.; vs Osmadenia: Blepharizonia is sticky-glandular; Osmadenia completely lacks sticky glands.; vs Calycadenia: Blepharizonia has shallowly lobed rays; Calycadenia has deeply split, fringed ray petals.
Frequently asked questions
Is Blepharizonia sp. native to California?
No. Blepharizonia sp. is not native to California (recorded as variable; species dependent).
What plant family does Blepharizonia sp. belong to?
Blepharizonia sp. is in the Asteraceae family, genus Blepharizonia.
Related species
Other California species in the same genus, family, or bioregion.
- Blepharizonia laxa — Glandular big tarweed
- Blepharizonia plumosa — Big tarplant
- Brickellia atractyloides — Spear leaved brickellia
- Brickellia atractyloides var. arguta — Pungent brickellbush
- Brickellia atractyloides var. atractyloides — Spearleaf brickellbush
- Brickellia atractyloides var. odontolepis — California spear leaved brickellia
Sources: Jepson eFlora · CalPhotos
Last updated 2026-04-14
Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Cal-IPC, and more.