Also called Belladonna, with fruit known as devil’s berries or death cherries, this is one of the most toxic plants in the western hemisphere. Native to Europe, Africa, and Asia, and naturalized in Washington, Oregon, California, Michigan, New York, and New Jersey, deadly nightshade is a bushy perennial that grows to 6 feet, has pale-green oval leaves, bears purple flowers in groups of three, and produces dark purple berries. Both the leaves and the fruit pack serious poison. The plant poses a particular risk to children, who are drawn to the slightly sweet berries and have been known to die from eating as few as two. Though not as deadly, bitter or bittersweet, nightshade—which is an invasive vine and much more common—produces red berries in clusters, and will make you plenty sick in its own right.