EASTERN BLACK NIGHTSHADE, Solanum ptycanthum Dun. 1, entire plant; 2, berry; 3, flower. Annual, reproducing by seed. Stem erect or spreading, becoming widely branched, 1 to 2 feet (30 to 60 cm) tall. Leaves ovate, 1 to 3 inches (2.5 to 7.5 cm) long, alternate, edges wavy. Flowers white, 5 lobed, about 1/4 inch (6 mm) across, in small clusters. Berries green, turning black at maturity, smooth, about 3/8 inch (9 mm) in diameter, containing numerous seeds. Seeds flattened, about 1/16 inch (1.5 mm) in diameter, dull, pitted, yellow to dark brown. Found in cultivated fields, garden areas, and waste places. Unripe berries may be poisonous. This species was formerly known as black nightshade (Solanum nigrum L.). According to recent taxonomic studies, S. nigrum occurs in the U.S. only in the western states. S. ptyconthum, which differs slightly from S. nigrum, is the species found east of the Rocky Mountains.