Common name: bramble, blackberry, European blackberry, black heg, wild blackberry
Binomial name: Rubus fruticosus agg.
Taxonomically, Rubus fruticosus is treated as a broad complex or aggregate of several slightly differing species that belong to sections and subsections. Over 300 microspecies have been recognised in the UK. As a result it is variable in leaf shape and plant form.
Could be confused with: blackberry is fairly unmistakable, but there are a couple of species that it could be confused with, especially in its unripe form.
Wild raspberry (Rubus idaeus) also produces aggregate fruits, meaning they are composed of many tiny individual fruits or drupelets. They can all be a similar colour at certain times and ripen at similar times of the year. There are some differences to help identification. When a ripe raspberry is picked it is red and there is a hollow within the fruit. When a ripe blackberry is picked it is black and the soft white core remains inside the fruit.
Dewberry (Rubus caesius), another close relative, resemble blackberries but tend to have fewer, larger individual fruits or drupelets. Their fruit surface is waxy rather than shiny and their stems tend to scramble along the ground rather than being tall and arching.