Boletus auripes

Boletus auripes, commonly known as the butter-foot bolete, is a species of bolete fungus in the family Boletaceae. First described from New York in 1898, the fungus is found in eastern Asia, Central America, and eastern North America from Canada to Florida. It is a mycorrhizal species and typically grows in association with oak and beech trees. The fruit bodies (mushrooms) formed by the fungus have convex to nearly flat caps that are up to 13 cm (5.1 in) wide. The stems are up to 10 cm (3.9 in) long by 3 cm (1.2 in) thick, and feature reticulations (net-like ridges) on the upper portion. Other than the brownish upper cap, the entire surface of the mushroom is yellow. B. auripes is edible. It can be distinguished from other similar yellow boletes by differences in color, degree of stem reticulation, and distribution....read more on Wikipedia.