The Romans knew the large Boletus family by the name of Suillus – which means pig in Latin and which we find today in the Italian language under the name of Porcino.
It seems that Latin pigs were also fond of porcini and slippery jack! Its beautiful French name of "Nonnette voilée" (Veiled nun) likely comes from its resemblance to the colour of the round gingerbread biscuit which was originally made in nuns’ convents.
It also takes its name "Baveux" (Slime) from the slimy cuticle on its cap. In its fresh state, if not removed, this mushroom has a somewhat laxative effect ... When dried and canned, however, this characteristic disappears. Its cap is a yellowish brown, earthy colour. The foot is generally yellowish-white, with brown spots on the underside of the annulus and a brownish colour at the base. In the young state, this annulus – which is rare in slippery jack – completely connects the foot to the edges of the cap. It shrinks considerably as the fungus ages, until it disappears entirely. The flesh is moist and soft, whitish when young, yellowish when declining.