Tanacetum sp.
Tansy, Tansy
Family: Asteraceae · Type: Perennial · Variable; species dependent
Tanacetum sp. (Tansy) is a non-native California perennial in the Asteraceae family.
How to tell it apart
vs Achillea: Achillea has obvious white ray flowers; Tanacetum buttons lack rays entirely; vs Anthemis: Anthemis has a cone-shaped receptacle; Tanacetum receptacle is flat or slightly convex; vs Chamaemelum: Chamaemelum receptacle is distinctly hollow; Tanacetum solid - gently squeeze flower center; vs Chrysanthemum: Chrysanthemum has spreading ray flowers; Tanacetum typically rayless yellow buttons; vs Erigeron: Erigeron has thin thread-like rays; Tanacetum buttons completely lack rays
Frequently asked questions
Is Tanacetum sp. native to California?
No. Tanacetum sp. is not native to California (recorded as variable; species dependent).
What plant family does Tanacetum sp. belong to?
Tanacetum sp. is in the Asteraceae family, genus Tanacetum.
Related species
Other California species in the same genus, family, or bioregion.
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.