Blackberry

Blackberry, the fruit of the brambles, species formerly united under the name Rubus fruticosus. It is known technically as an etaerio of drupels, consisting of a number of distinct (apocarpous) carpels, each of which is a drupel or miniature drupe, with polished skin or epicarp, fleshy mesocarp, and stone (endocarp), containing one seed, but differing from a plum in having a persistent style. The calyx and stamens also persist in the fruit stage. Blackberries are largely collected in England for puddings, jam, and jelly.