Botanical name: Solanum nigrum
Family name: Solanaceae
Black nightshade is often confused with deadly nightshade (Atropa bella-donna), which is a much more poisonous weed than black nightshade, and also much less common, being found only occasionally near Christchurch. The berries produced by black nightshade are often eaten by birds, and the seeds are thus spread in bird droppings. (Massey Uni Weeds Database)
A tough-stemmed plant, pulled from a fenceline on nearby Haig Ave.