Hydnum
(from Hydnon, the old Greek name used by Theophrastus for the Truffle). A genus of about 200 species of hymenomycetous fungi, varying greatly in size and substance, but all distinguished by the fructifying surface (hymenium) consisting of prickles projecting from the cap (pileus). The species are found in all climates, but are most frequent in temperate regions. H. repandum is not uncommon in Britain; it occurs in woods, in scattered patches or large rings, and, if properly cooked, affords an excellent article of food. The specimens, which must be perfectly fresh, after being sliced into hot water, and gently pressed, should be carefully stewed, or rubbed down into a puree.