Gastroboletus turbinatus
Brittonia 11: 208. 1959.
Common Name: none
Synonym: Boletus turbinatus Snell
For descriptions see Castellano et al. & Thiers & Trappe.
Scattered to gregarious under conifers in the montaine regions of the state. Also rarely under live oaks in coastal California.
Unknown.
The blue staining of the context of Gastroboletus turbinatus separates this species from other California species of Gastroboletus except Gastroboletus xerocomoides. Macroscopically these two can be differentiated by cap color: Gastroboletus turbinatus has a red to reddish brown cap, whereas Gastroboletus xerocomoides has a brown to olive brown or yellow brown cap. Microscopically Gastroboletus turbinatus lacks the truncate spores of Gastroboletus xerocomoides.
Like most Gastroboletus species G. turbinatus is a gastroid relative of a non-gastroid bolete genus. Gastroboletus turbinatus is closely related to species of Neoboletus (and not close to other Gastroboletus) and will probably eventually be transfered there.
Arora, D. (1986). Mushrooms Demystified. Ten Speed Press: Berkeley, CA. 959 p.
Castellano, M.A., Cázares, E., Fondrick, B. & Dreisbach, T. (2003). Handbook to additional fungal species of special concern in the Northwest Forest Plan (Gen. Tech Rep. PNW-GTR-572). U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: Portland, OR. 144 p. (PDF)
Siegel, N. & Schwarz, C. (2016). Mushrooms of the Redwood Coast. Ten Speed Press: Berkeley, CA. 601 p.
Smith, A.H. & Singer, R. (1959). Studies on Secotiaceous Fungi IV. Gastroboletus, Truncocolumella, and Chamonixia. Brittonia 11: 205-223.
Snell, W.H. (1936). Notes on Boletes. IV. Mycologia 28(1): 13-23.
Thiers, H.D. (1975). California Mushrooms—A Field Guide to the Boletes. Hafner Press: New York, NY. 261 p.
Thiers, H.D. & Trappe, J.M. (1969). Studies in the genus Gastroboletus. Brittonia 21: 244-254. (PDF)
Trappe, J.M., Molina, R., Luoma, D.L., Cázares, E., Pilz, D., Smith, J., Castellano, M.A., Miller, S.L. & Trappe, M.J. (2009). Diversity, Ecology, and Conservation of Truffle Fungi in Forests of the Pacific Northwest. U. S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: Portland, OR. 194 p. (PDF)
