 Strobilurus tenacellus is a saprobic wood @-@ rotting fungus . It fruits singly or in small groups on fallen and often partially buried cones of Scots pine ( Pinus sylvestris ) , European black pine ( Pinus nigra ) and sometimes spruce ( Picea ) in coniferous and mixed forests . It is found in Europe and Asia , where it has been recorded in Japan and Jordan . In Europe , the fungus usually fruits from March to June . Its occurrence is occasional . 
