is a thorny much-branched, deciduous
shrub, 1-3 m tall, suckering
freely from the base and thereby forming extensive patches in sand
dunes and on sea-cliffs. It is frequently cultivated as an ornamental
plant inland and sometimes escapes.
There are male
and female plants with flowers which open in March and April before
the leaves. They are small, inconspicuous, petalless and wind-pollinated.
The flower buds
of the male are larger than those of the female and in winter the
sex of separate bushes can be seen.
The fruits are
large, 6-8 mm across, roundish
and orange. They are ripe in September.