They are in abundance in woods and fields. Baneberry, Star of Bethlehem and False Hellebore are some of the common plants. Scrub Oak can be found on roadsides. You can also find Climbing Bittersweet on the roadside. Poisonous plants can even be found in homes and offices such as Lily of The Valley and Mistletoe.
Some plants are toxic in very small amounts.
One or two Castor Beans seeds may kill a child. After ingestion the poison may act immediately on the digestive tract. Some plants effect the heart such as Oleander. A few poisons act within the cells of the body, such as cyanide, which can come from the Wild Cherry plant. There's a plant that grows wild in Florida that is called The Angel Trumpet.