The fruit bodies ( also called conks ) of " Bridgeoporus " are found singly or sometimes in overlapping layers on old trees ( diameter at breast height ) of noble fir ( " Abies procera " ), and more rarely Pacific silver fir ( " Abies amabilis " ) or western hemlock ( " Tsuga heterophylla " ).
2.
This species is found in the Pacific Northwest region of North America where it grows on large ( at least 1 m diameter ) specimens of noble fir ( " Abies procera " ), Pacific silver fir ( " Abies amabilis " ), or western hemlock ( " Tsuga heterophylla " ) . " Bridgeoporus nobilissimus " causes a brown rot in its tree hosts.