Bramble

Bramble or brambleberry may also refer to the blackberry fruit or products of its fruit (e.g., bramble jelly). The shrub grows abundantly in all parts of the British Isles and harvesting the fruits in late summer and autumn is often considered a favourite pastime. It can also become a nuisance in gardens, sending down its strong suckering roots amongst hedges and shrubs. Many consider it a weed due its tendency to grow in neglected areas and its sharp, tough thorns which can be hazardous to children and pets.
Bramble bushes have long, thorny, arching shoots and root easily. They send up long, arching canes that do not flower or set fruit until the second year of growth. Brambles usually have trifoliate or palmately-compound leaves.
Bramble fruits are aggregate fruits.  Each small unit is called a drupelet. In some, such as the blackberry, the flower receptacle is elongated and part of the ripe fruit, making the blackberry an aggregate-accessory fruit.