The specimen was on an oak log, which fits nicely with the species that I keyed it to. However, my species ID is a little uncertain. The spores sizes that I measured 6.2-7 X 2.8-3.3 are a little long for X. crustosus and a little short for X. quercinus, and I'm not sure if I see the capitate cystidioles (at least as picture in Bernicchia et al.). Eventually there should be some sequence to go with support or refute this.