The blackberry's an aggregate fruit from a bramble bush, genus Rubus in the rose family Rosaceae. It's a widespread, and well known group of several hundred species, many of which are closely related apomictic microspecies native throughout the temperate Northern hemisphere. Growth and anatomical description Blackberries are perennial plants which typically bear biennial stems ("canes") from the perennial root system. In its first year, a new stem grows vigorously to its full length of 3-6 m,… (More on Blackberry)