7 Plants Which Are Poisonous 

Found in North America, poison ivy contains an oily resin called urushiol that causes allergic skin reactions, leading to itching, redness, swelling, and blisters upon contact.

The seeds of the castor bean plant contain ricin, a highly toxic protein that can be fatal if ingested. It can cause nausea, vomiting, diarrhea, abdominal pain, and organ damage.

Oleander is a highly toxic ornamental plant containing cardiac glycosides, which can cause nausea, vomiting, abdominal pain, irregular heart rhythms, and potential heart failure.

Jimsonweed contains toxic alkaloids that can cause hallucinations, delirium, rapid heartbeat, fever, seizures, and even death if ingested in large quantities.

Foxglove contains cardiac glycosides, similar to oleander, which can cause irregular heart rhythms, nausea, vomiting, diarrhea, headache, and visual disturbances.