Melanelia subaurifera
Melanelia subaurifera photo by Bob Klips
DIAGNOSTIC FEATURES: Olive-brown color; fragile cortex; no pseudocyphellae; isidia tiny, cylindrical, often clustered; medulla C+ red; compare with M. exasperata, which has a warty surface, medulla C-.
ECOLOGY: Primarily eastern US; scattered in Ohio but more common in eastern counties; frequently found on branches of willow and black walnut in wet areas.