Growing in lodgepole pine and Englemann spruce forest along a Quaking aspen grove. It's much less common than another brown-capped bolete, with bright yellow and smaller, consistenly-sized pores, that grows in this area. This mushroom with variable sized and rather large pores appears to have remnants of a ring on the stem. It has a rather odd cap color, basically tan but with a sort of greyish, bluish or greenish tinge. The pore surface is dingey yellow and bruises reddish brown. I have keyed it tentatively to the genus Suillus using: Kuo, M. (2005, March). The boletes ("Boletales"). Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/boletales.html