Leaf[498] nard varies in price according to the size; for that which is known by the name of hadrosphærum, consisting of the larger leaves, sells at forty denarii per pound; when the leaves are smaller, it is called mesosphærum, and is sold at sixty. But that which is considered the most valuable of all, is known as microsphærum, and consists of the very smallest of the leaves; it sells at seventy-five denarii per pound. All these varieties of nard have an agreeable odour, but it is most powerful when fresh. If the nard is old when gathered, that which is of a black colour is considered the best. In our part of the world, the Syrian[499] nard is held in the next highest esteem next to this; then the Gallic;[500] and in the third place, that of Crete,[501] which by some persons is called “agrion,” and by others “phu.” This last has exactly the leaf of the olusatrum,[502] with a stalk a cubit in length, knotted, of a whitish colour, inclining to purple, and a root that runs sideways; it is covered, too, with long hair, and strongly resembles the foot of a bird. Field nard is known by the name of baccar.[503] We shall have further occasion to mention it when we come to speak of the flowers. All these kinds of nard, however, are to be reckoned as herbs, with the exception of Indian nard. Of these, the Gallic kind is pulled up along with the root, and washed in wine; after which it is dried in the shade, and wrapped up in paper, in small parcels. It is not very different from the Indian nard, but is lighter than that of Syria; the price at which it sells is three denarii per pound. The only way of testing the leaves of all these varieties of nard, is to see that they are not brittle and parched, instead of being dried naturally and gradually. Together with the nard that grows in Gaul, there always[504] springs up a herb, which is known by the name of hirculus, or the “little goat,” on account of its offensive smell, it being very similar to that of the goat. This herb, too, is very much used in the adulteration of nard, though it differs from it in the fact that it has no stem, and its leaves are smaller; the root, too, is not bitter, and is entirely destitute of smell. CHAP. 27. (13.)—ASARUM, OR FOAL-FOOT.