Bramble
From PLANTFACTS.OSU.EDU
1. any shrub with thorns in the rose family; usually refers to blackberries and raspberries.

Flowering bramble.
Source: http://www.gardenorganic.org.uk/organicweeds/weed_information/weed.php?id=133
1. any shrub with thorns in the rose family; usually refers to blackberries and raspberries.

Flowering bramble.
Source: http://www.gardenorganic.org.uk/organicweeds/weed_information/weed.php?id=133