The toxic plant commonly referred to is poison ivy, which contains an oil called urushiol. This oil can cause an allergic skin reaction in many people, leading to itching, redness, and blisters. It typically grows in wooded areas, along trails, and in gardens, making it important to recognize and avoid. Another well-known toxic plant is deadly nightshade, also known as belladonna. All parts of this plant contain toxic alkaloids, which can be fatal if ingested. Symptoms of poisoning include dilated pupils, sensitivity to light, and hallucinations. Due to its dangerous nature, it is crucial to keep this plant away from children and pets.