I saw about 10 of these this weekend - growing solitary in different locations. White spore print. growing between 8,500 to 10,00 feet in elevation. All were growing within feet of a cold mountain stream. The cap looked exactly like Xerula furfuracea to me (they weren't, though: there was no tap root in mine). Diameter of cap ranged from 1 1/2 to 5 cm. Growing on moss.