Boletinellus merulioides 

Boletinellus merulioides (Schwein.) Murrill 1909 (Gyrodon merulioides) 

Ash Tree Bolete" Yellow-brown to olive kidney-shaped or irregularly lobbed cap with inrolled margin. Flesh tough, yellow staining blue-green to brown. Shallow tubes are yellow-ochre. Pores large and radially arranged, variable. Off-center, short stalk. Under ash trees. Has an interesting relationship with aphids. Not mycorrhizal. It is in the Boletellaceae family of the Boletales order.