list of genera of wood decay fungi

Oligoporus amarus; sporocarps annual, pileate and sessile, soft in consistency; pileus suede-like and tan in color, hymenophore porose with the diameter of the pores small. Sporocarps last about 3 weeks on the trees before they are completely destroyed by insects (the sporocarp in the left picture are about 2 weeks old). O. amarus causes a brown cubical rot of cedars, particularly incense cedar, with the rot restricted to large pockes. The rotted wood of cedars is sold under the name of 'pecky cedar'.

Phaeolus schweinitzii, the velvet-top polypore. Sporocarps annual, first produced in the middle to late fall (middle picture, above) and are soft in consistency, with a greyish porose hymenophore, a soft, yellowish brown pileal margin, and a dark brown velvety pileus surface. In the spring, the sporocarps are dried, fragile, and dark reddish brown to black (picture to the right, above). This fungus causes a dark brown, cubical rot (picture to the left, above) of the butt and roots of live conifers and it can cause centers of diseased trees. Sporocarps are typically produced on the ground or sometimes on the stumps of dead trees. In elevations above 3000 feet, Phaeolus schweinitzii can be confused with Inonotus dryaedeus. As can be seen in the pictures below, P. schweintizii can be identifed by its greyish brown, porose hymenophore, velvety pileus surface, and the context which is only 1-2 inches at the margin and lacks ring-like areas.