G. applanatum usually has a cinnamon brown top (it's my understanding it's due to the abundant spores released which end up on there). These look more like Fomitopsis ochracea to me (it's easily the most common woody bracket fungus like this around Sitka, not sure about there).
Ellen Rykers
2015-06-00
2015/06/29 11:37 AM NZST
Canada, British Columbia, Skeena-Queen Charlotte, BC, Canada