Mycologia 102(5): 1053. 2010.
Common Name: Oregon white truffle
Hypogeous under conifers, primarily Douglas fir (Pseudotsuga menziesii).
Edible and excellent when mature.
Tuber oregonense belongs to a group of closely related species known as the Tuber gibbosum clade, which includes Tuber gibbosum, T. castellanoi, and T. bellisporum. All four species occur in California. They are nearly indistinguishable macromorphologically, differing subtly in spore morphology and molecular sequences. All form white fruitbodies that discolor yellowish brown, orangish brown or reddish brown, with a solid gleba marbled from sterile white veins and pale brown to reddish brown fertile tissues. Tuber oregonense and T. gibbosum are collected from the wild and sold commercially as the Oregon white truffle.
Bonito, G., Trappe, J.M., Rawlinson, P. & Vilgalys, R. (2010). Improved resolution of major clades within Tuber and taxonomy of species within the Tuber gibbosum complex. Mycologia 102(5): 1042-1057. (Protologue)
Desjardin, D.E., Wood, M.G. & Stevens, F.A. (2015). California Mushrooms: The Comprehensive Identification Guide. Timber Press: Portland, OR. 560 p.