King trumpet mushroom. Typically these mushrooms grow on the roots of wild thistles (cardo in Italian), hence the name. In Puglia they grow plentifully in the woods of Murge, near Bari, where they are celebrated each year in a special regional fair held between Gravina and Altamura. name. It may be eaten either fresh or dried, roasted or baked but the flavour is not highly regarded and the flesh is chewy.