Poison Hemlock

Also known as: Poison Parsley, Spotted Hemlock, Winter Fern, California Fern, Nebraska Fern, Deadly Hemlock

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Clinical Signs: Agitation, tremors, drooling, diarrhea, paralysis, death
Family: Umbelliferae
Scientific Name: Conium maculatum
Toxic Principles: Various alkaloids

Source: ASPCA Toxic and Non-Toxic Plants list (dogs), scraped 2026-07-14 from https://www.aspca.org/pet-care/animal-poison-control/dogs-plant-list · view original