The North American P group of Heterobasidion annosum s.l. is widely distributed in Pinus pinea forests of the western coast of central Italy - D'Amico, L.; Motta, E.; Annesi, T.; Scire, M.; Luchi, N.; Hantula, J.; Korhonen, K.; Capretti, P. (DE, 2007)
Keywords: juurikääpä; lajihybridit; tulokaslajit