Tricholoma griseoviolaceum
Mycologia 88(3): 497. 1996.
Common Name: none
Cap 4-11 cm broad, broadly conic, the margin often undulate, becoming convex-umbonate; surface viscid when moist, purpulish-grey to brownish-grey, radially streaked, darkest at the disk, in age turning drab-brown; flesh thin, pallid to pale grey; odor and taste, farinaceous, especially in age.
Gills adnate to notched, moderately broad, pallid, dingy pale-buff in age.
6-14 cm tall, 1-2 cm thick, stuffed, equal to tapering to the base; surface pallid to white, moist, obscurely striate above with a scattering of brown fibrils below; flesh pallid, unchanging; veil absent.
Spores 5-7 x 3.5-5 µm, elliptical, smooth; spore print white
Solitary to gregarious under oaks (Quercus) and tanoak (Lithocarpus); fruiting from early to mid-winter.
Unknown. It has probably been eaten when misidentified as Tricholoma portentosum, an edible species.
Tricholoma griseoviolaceum is recognzied by a viscid, purplish-grey to greyish-brown, radially streaked cap, pallid to light grey gills, and farinaceous odor. Tricholoma virgatum is similar in coloration, but is not viscid, has a more conic cap when young and lacks a distinct farinaceous odor.
Bessette, A.E., Bessette, A.R., Roody, W.C. & Trudell, S.A. (2013). Tricholomas of North America. University of Texas Press: Austin, TX. 208 p.
Desjardin, D.E., Wood, M.G. & Stevens, F.A. (2015). California Mushrooms: The Comprehensive Identification Guide. Timber Press: Portland, OR. 560 p.
Shanks, Kris M. (1994). A Sytematic Study of Tricholoma in California. Masters Thesis, San Franciso State University: San Francisco, CA. 207 p. (PDF)
Shanks, Kris M. (1996). New species of Tricholoma from California and Oregon. Mycologia 88: 497-508. (Protologue) (PDF)
Shanks, Kris M. (1997). The Agaricales (Gilled Fungi) of California. 11. Tricholomataceae II. Tricholoma. Mad River Press: Eureka, CA. 54 p.
Siegel, N. & Schwarz, C. (2016). Mushrooms of the Redwood Coast. Ten Speed Press: Berkeley, CA. 601 p.
Trudell, S.A., Matheny, P.B., Parker, A.D., Gordon, M., Dougil, D.B. & Cline, E.T. (2022). Pacific Northwest Tricholomas: Are We Using the Right Names? Self Published: Seattle, WA. 103 p.
