Conium sp.
Poison hemlock, Poison Hemlock
(c) Mick Talbot, some rights reserved (CC BY) · licence
Family: Apiaceae · Type: Biennial · Not Native
Conium sp. (Poison hemlock) is a non-native California biennial in the Apiaceae family.
How to tell it apart
vs Anthriscus: Conium has purple-spotted smooth stems; Anthriscus has unspotted hairy stems and beaked fruits.; vs Torilis: Conium has smooth fruits with wavy ribs; Torilis has fruits covered with hooked bristles.; vs Foeniculum: Foeniculum has thread-like leaves and anise scent; Conium has broader leaflets and musty odor.; vs Daucus: Conium has purple-spotted stems; Daucus has hairy stems and fruits that curl into a bird's-nest.; vs Heracleum: Heracleum is massive with huge leaves and unspotted stems; Conium has purple-spotted stems.
Frequently asked questions
Is Conium sp. native to California?
No. Conium sp. is not native to California (recorded as not native).
What plant family does Conium sp. belong to?
Conium sp. is in the Apiaceae family, genus Conium.
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.