Pleurotus tuber-regium, the king tuber mushroom, is an edible gilled fungus native to the tropics, including Africa, Asia, and Australasia. It has been shown to be a distinct species incapable of cross-breeding and phylogenetically removed from other species of Pleurotus. In addition to being saprotrophic, P. tuber-regium is also nematophagous, catching nematodes by paralyzing them with a toxin.