- Johnson Grass: This weed can cause photosensitization, laminitis, and kidney disease.
- Wild Parsnip: This weed can cause dermatitis, eye inflammation, and skin discoloration.
- Curly Dock: This weed can cause kidney failure and liver damage.
- Bracken Fern: This weed can cause kidney disease and bone marrow depression.
- Nightshade: This weed can cause gastrointestinal problems, vomiting, and diarrhea.
- Ragwort: This weed can cause liver damage, kidney failure, and neurological problems.
- Buttercups: These weeds can cause gastrointestinal problems and skin irritation.
- Common Groundsel: This weed can cause liver damage and neurotoxicity.
- Jimsonweed: These weeds can cause gastrointestinal upset, hallucination, and seizures.
- Water Hemlock: This weed can cause respiratory problems, cardiac arrest, and death.