Ageratina sp.
Snakeroot, Snakeroot
Family: Asteraceae · Type: Perennial · Variable; species dependent
Ageratina sp. (Snakeroot) is a non-native California perennial in the Asteraceae family.
How to tell it apart
vs Baccharis: Ageratina has opposite leaves and bisexual flowers; Baccharis has alternate leaves and separate male/female plants.; vs Spiraea: Ageratina has composite flower heads; Spiraea has individual 5-petaled flowers in branched clusters.; vs Venegasia: Ageratina has white rayless flowers; Venegasia has large yellow ray petals and huge triangular leaves.; vs Eupatorium: Same genus (Eupatorium is old name); plants are identical.; vs Scrophularia: Ageratina has composite flower heads; Scrophularia has tubular two-lipped flowers typical of figworts.
Frequently asked questions
Is Ageratina sp. native to California?
No. Ageratina sp. is not native to California (recorded as variable; species dependent).
What plant family does Ageratina sp. belong to?
Ageratina sp. is in the Asteraceae family, genus Ageratina.
Related species
Other California species in the same genus, family, or bioregion.
- Ageratina adenophora — Crofton weed
- Ageratina herbacea — Desert ageratina
- Ageratina occidentalis — Western snakeroot
- Ageratina shastensis — Shasta ageratina
- Agoseris apargioides — Coast dandelion
- Agoseris apargioides var. apargioides — Coast dandelion
- Agoseris apargioides var. eastwoodiae — Beach dandelion
- Agoseris apargioides var. maritima — Woolly goat chicory
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.