I'd call this G. brownii based on the vertically-elongating hoof-like shape and growth on Umbellularia (as identified by bark pattern and long, smooth-edged lanceolate green leaves)
R.J. Adams
2016-02-14
2016-02-14
United States of America, California, Prairie Creek Redwwods State Park
I believe this is either G. brownii or G. applanatum. Crawling below it is a large snail, the Pacific Sideband (Monadenia fidelis). @leptonia , @alan_rockefeller Do either of you gentlemen recognize this fungus?