This large bolete has a dry, sometimes slightly velvety, convex, to flat, ochre-brown cap 4-1/2 to 9 inches across, with an uneven margin. It becomes rusty-brown where bruised. The flesh is pale yellow but becomes greenish after having been damaged, as do the pores.

The pale yellow tubes are sunken near the stalk. The light yellow pores become darker yellow, brownish where bruised. The spore print is olive brown.

The irregularly grooved, yellowish beige stalk is 4-6 inches long, 3/4 to 1-7/8 inches thick. It bruises slightly blue.

This mushroom grows under hemlock or oak trees in Northeastern North America in the summer.

It's a rare species. I only found it once, while leading a tour in Clove Lake Park in Staten Island, but an entire hillside was covered with them, and the participants were thrilled: It's a choice edible, and the flavor is as spectacular as the spectacle it creates.