Each of these component ecoregions can be described by either a tree indicator species, or by a lack of trees : western hemlock, Pacific silver fir, subalpine mountain hemlock, subalpine fir, and grand fir / Douglas fir.
12.
Maries'fir is very closely related to Pacific silver fir " A . amabilis " from the Pacific coast of North America, which is distinguished by its slightly longer leaves ( 2 4.5 cm ) and larger cones ( 9 17 cm long ).
13.
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 " ).
14.
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.
