fomitopsis pinicola. red-belted conk fungus on tree trunk. fungus

affects autumn black cause characterized color conifer decomposition distinctive flower fomitopsis forest forests fungus green growth integrity leaf logs mushroom nature pinicola plant pore produce range red red-belted reddish-brown release rot shelf-like soil spores structural stumps surface tiny tree trees trunk trunks underside upper weakening wood wood-decaying woodland