On wet decorticated hardwood, presumably birch given the presence of F. fomentarius on the same log and surrounding birches. Almost entirely resupinate at this time. Longest spines are 2mm in length or less, with largest groupings measuring just over 3 cm. Spores are asymetrical, globose, approx 5 x 4 micrometers, with fine ornamentation. Basidia with four sterigmata.