The blackberry is the dark, glossy aggregate fruit of bramble canes in the genus Rubus, a sweet-tart late-summer berry whose deep purple-black colour comes from anthocyanin pigments. Each "berry" is in fact a tight cluster of tiny juicy drupelets packed around a central core, and it eats with a soft, seedy, winey richness that has made it a hedgerow forager's prize and the backbone of jams, pies, cordials and crumbles across the temperate world.