31. It is very large and due to its thick stem it can be mistaken for " Boletus edulis ". 32. Other North American boletes in this section include " Boletus speciosus " and " Boletus regius ". 33. Other North American boletes in this section include " Boletus speciosus " and " Boletus regius ". 34. Another study even identified 22 proteins differentially produced under salt stress of the EcM fungus " Boletus edulis ". 35. The highly prized boletus mushroom with a brown cap and white stem tends to pop up under pines, birches and oaks. 36. "Boletus aereus " is classified in " Boletus " diverged around 6 to 7 million years ago. 37. "Boletus aereus " is classified in " Boletus " diverged around 6 to 7 million years ago. 38. "Boletus edulis " occurs later in the season during lower temperatures, mostly under " Picea ". 39. "Boletus reticulatus " is classified in " Boletus " diverged around 6 to 7 million years ago. 40. "Boletus reticulatus " is classified in " Boletus " diverged around 6 to 7 million years ago.
