Stereum sanguinolentum (Alb. & Schwein.) Fr.

Stereum sanguinolentum is a species of fungus in the Stereaceae family. A plant pathogen, it causes red heart rot, a red discoloration on conifers, particularly spruces and Douglas-firs. Fruit bodies, which are produced either on dead wood or on dead branches of living trees, form a thin leathery crust on the wood surface. Fresh fruit bodies will bleed a red-colored liquid if injured, reflected in the common names bleeding Stereum or the bleeding conifer parchment. It can be the host of the parasitic jelly fungus Naematelia encephala