Ganoderma oregonense
North American Flora 9(2): 119. 1908.
Common Name: varnished conk
For description see Gilbertson & Ryvarden, Ginns, & 'California Mushrooms'.
Solitary on standing dead conifer trees and on conifer stumps and logs; common, fruiting from fall through mid-winter, widely distributed.
Inedible.
Ganoderma oregonense can be recognized by a smooth, lacquered, mahogany to dark reddish brown cap, white to yellowish white pore surface, a stubby lateral stipe, and growth on dead conifers. Ganoderma tsugae, reported from California and considered distinct from G. oregonense based on molecular data, is nearly indistinguishable, differing only in forming smaller with narrower spores and growth primarily on red fir, despite the epithet’s reference to hemlock.
Arora, D. (1986). Mushrooms Demystified. Ten Speed Press: Berkeley, CA. 959 p.
Desjardin, D.E., Wood, M.G. & Stevens, F.A. (2015). California Mushrooms: The Comprehensive Identification Guide. Timber Press: Portland, OR. 560 p.
Gilbertson, R.L. & Ryvarden, L. (1986). North American Polypores, vol. 1. Fungiflora: Oslo, Norway. 433 p. (PDF)
Ginns, J. (2017). Polypores of British Columbia (Fungi: Basidiomycota). British Columbia: Victoria, BC. 260 p. (PDF)
Murrill, W.A. (1907). North American Flora: (Agaricales) Polyporaceae-Agaricaceae. 9(2): 73-132. (Protologue)
Overholts, L.O. (1953). The Polyporaceae of the United States, Alaska, and Canada. University of Michigan Press: Ann Arbor, MN. 466 p.
(PDF)
Siegel, N. & Schwarz, C. (2016). Mushrooms of the Redwood Coast. Ten Speed Press: Berkeley, CA. 601 p.
