Truffle, or Trubs, Lyco-perdon tuber, L. (Tuber cibarium of Dr. Withering), is a species of puff-ball, which grows under ground, without any roots or the access of light: and attains a size of from a pea to the largest potato. In Britain, however, it is of a globular form, resembling that of a large plumb; and, when young, its surface is whitish ; being inter-spersed with elevated dots, the centre of which contains a browri powder, similar to that of the common Puff-ball: as it becomes old, the colour turns black. - This species of fungus may be searched for in hilly forests, which have a sandy or dry clayey bottom, at the depth of four or five inches in the earth; though it seldom exceeds four or five oz. in weight, while those produced on the Continent, frequently weigh from eight to sixteen ounces. - It is one of the most wholesome and nutritive of the esculent fungi, and is generally discovered by means of dogs, which are taught to scent it; so that, on smelling the truffle, they bark, and scratch it up. - In Italy, it is likewise rooted up by pigs, which are either furnished with a ring around their snout; or, it is taken from them by an attendant.

Truffles are highly esteemed at the tables of the luxurious, where they 3re served up, either roasted in a fresh state, like potatoes ; or, they are dried, sliced, and dressed as ingredients in soups and ragouts. The most delicious are internally white, and possess the odour of garlic. - They pay, on importation, a duty of 2s. 5 1/2d. per lb.