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The bramble (Rubus fruticosus) is a genus of the Rosaceae family which produces an edible fruit called blackberry . The fruit is not a true berry; botanically it is termed an aggregate fruit, composed of small drupelets. The plants typically have biennial canes and perennial roots. Blackberries and raspberries are also called caneberries or brambles.
It is a very invasive species and a widespread, and well known group of over 375 species, many of which are closely related apomictic microspecies native throughout the temperate northern hemisphere and South America.
The funny marks on the leaves are made by a leaf miner, usually a moth caterpillar. The larva eats the internal tissue of the leaf and leaves its skin on both sides. You can see how the marks get wider as they grow from the edge of the leaf to the inside.