Bridgeoporus nobilissimus

Mycobank (2025) recognizes Oxyporus nobilissimus as the accepted name for this element.

A western North American endemic known from only 3 states. Only 6-10 occurrences were known prior to 1995 (Norvell 1995, Gilbertson & Ryvarden 1986). A large number of the newly reported ""sites"" appear to reflect repeated samplings from same populations and are suspect. Only 2 collections are cited in the OSC herbarium, and only 1 (apparently part of one in the OSC herbarium) is cited in the OSU-FSL herbarium database. The species is tied to old-growth Abies procera/A. amabilis, species that are not being managed for. There is no question that the surveys have uncovered new sites, but the data need to be examined closely.

Endemic and restricted to the Cascade and Coast ranges from Washington south to northern California.

Data listed in the ISMS database citing 122 locations are suspect. Only 6-10 sites were known before recent surveys. There are only 3 collections listed as held in the OSU herbaria (11-18-02).The numbers may reflect collections that have not yet been verified by experts. In the ISMS 2002 location database, 1 collection is reported from California, 55 (representing ~22 distinct sites) from Oregon, and 5 sites from Washington.

Threats to this species are those actions that disrupt stand conditions necessary for its survival. These include activities that cause removal of host trees or modification of microclimatic conditions required for fruiting and survival, such as logging, road, trail, and campground construction (Hibler & O'Dell 1998)