Polyporus tuberaster, commonly known as the tuberous polypore[1][2] or stone fungus,[3] is a species of fungus in the genus Polyporus.
[4] It is easily identified by the fact that it grows from a large sclerotium that can resemble buried wood or a potato.
[5] The yellow-brown cap is 4–15 cm wide, and ranges from convex to flat and even funnel-shaped.
[6] The whitish stalks can grow upwards of 10 cm high and 2–4 cm wide.
[6] The species is edible but also tough.