Périgord black truffle (Tuber Melanosporum) is also known as a winter truffle. Black-brown on the outside, greyish to brown on the inside, it can be found throughout Europe (mainly in the French region of Périgord). When fully mature, it tastes truffle-like but smells of hazelnut.
Winter truffles or Périgord truffles can be found from December to February. It is more intense in smell and taste than summer truffles (tuber aestivum) and darker in color from the start. Scholars argue whether “tuber uncinatum” is a separate variety or just a subspecies of “tuber aestivum”. In Italy, both varieties are called "scorzone". "Scorzone estivo" the summer truffles and "scorzone invernale" the autumn truffles. The distribution areas essentially correspond to those of the summer truffles.