any of a genus (Boletus) of bolete mushrooms, usually with a thick, brownish stem and cap that are edible
See boletus in American Heritage Dictionary 4
(bō-lēˈtəs)
nounpl.bo·le·tus·es or bo·le·ti(-tīˌ)
A fungus of the genus Boletus, having an umbrella-shaped cap with spore-bearing tubules on the underside and including both edible and poisonous species.