Solanum carolinense is a species of nightshade plant native to North America. It is commonly known as Carolina horsenettle or just horsenettle. The plant is a perennial and can grow up to 3 feet tall. It has spiny stems, leaves, and fruit. The flowers are white to purple, and the fruit is a yellow or green berry. Other synonyms for Solanum carolinense include Carolina nightshade, bull-nettle, sandbur nightshade, and American black nightshade. Despite its attractive berries, Carolina horsenettle is considered a weed and can be toxic to livestock if consumed in large quantities.