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Klamath Weed
Also known as: St. John's Wort
dog unknown
Severity not yet documented — when in doubt, call your vet or animal poison control.
cat unknown
Severity not yet documented — when in doubt, call your vet or animal poison control.
horse unknown
Severity not yet documented — when in doubt, call your vet or animal poison control.
- Clinical Signs
- Photosensitization (ulcerative and exudative dermatitis).
- Family
- Clusiaceae
- Scientific Name
- Hypericum perforatum
- Toxic Principles
- Hypericin
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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