Growing on a Oregon white oak log in the Coburg Hills.
Growing in a sunny site on the crest of a rocky butte in Goshen. The tree stump, which appears to belong to a former Q. garryana tree, was cut to clear space for powerlines. Camassia seed heads were abundant around this site. It seems to be one of few prairie sites on this hill that remains somewhat intact.
Quercus garryana substrate
My best guess.