Tuber melanosporum Vitt., Die Perigord-Trüffel Truffe du Périgord, Perigord Truffle. Spherical or lumpy, 2-10cm across with a covering of polygonal warts, and the cut flesh turning violaceous-black with white river like lines throughout, wonderfully scented. Asci with up to 6 spoes 90-100 x 80-120um Spores elliptic, completely covered in spines 2-4um long, 29–55 x 22–35um. A specialty of the Perigore region of France, but also known from other countries around the Mediterranean, north Africa and Asia. Edible – excellent considered the best truffle. Found In Europe, under trees especially cork oak.