Its leaves are slightly toothed and grow opposite to one another.

The fruit is bitter and astringent, making it inedible when raw.

The fruit can be cooked to make jellies, jams, sauces and marmalade.

It has been introduced to North America and cultivated there as an ornamental plant since the 18th century.

In England, since the late 18th century, it has been used to cover unsightly walls.