Tuber Melanosporum (prestigious black truffle), has a characteristic strong aroma, deeper than the aroma of the white truffle. It is externally covered with brown-black warts, sometimes with a reddish tinge at its base, and its interior is purple-black with white stripes. Black winter truffles are associated with the roots of oak and hazel trees in limestone terrain and ripen from mid-November to mid-March. It is rarely found in our country, as it prefers a warm climate to the Bulgarian one.