Suillus ponderosus
Contr. Toward a Mongr. of N. Am. Sp. of Suillus, p. 38, pl. 11. 1964.
Common Name: none
For descriptions see Smith & Thiers, Thiers, Siegel & Schwarz.
Scattered to gregarious in soil under Douglas fir (Pseudotsuga menziesii); common, fruiting from early fall through winter, widely distributed.
Edible.
Suillus ponderosus can be distinguished by its viscid to glutinous, reddish brown to yellowish brown caps streaked with cinnamon, context tissue in the stipe base that bruises blue, and a glutinous yellow partial veil that persists as an orange to reddish cinnamon annulus. It is very similar to Suillus caerulescens, which differs in having a dry, white annulus. Both species are ectomycorrhizal with Douglas fir.
Bessette, A.E., Roody, W.C. & Bessette, A.R. (2000). North American Boletes: A Color Guide to the Fleshy Pored Mushrooms. Syracuse University Press: Syracuse, NY. 400 p.
Desjardin, D.E., Wood, M.G. & Stevens, F.A. (2015). California Mushrooms: The Comprehensive Identification Guide. Timber Press: Portland, OR. 560 p.
Siegel, N. & Schwarz, C. (2016). Mushrooms of the Redwood Coast. Ten Speed Press: Berkeley, CA. 601 p.
Smith, A.H. & Thiers, H.D. (1964). A Contribution Toward A Monograph of North American Species of Suillus. Privately Published: Ann Arbor, MI. 116 p. (Protologue) (PDF)
Thiers, H.D. (1967). California boletes III. The genus Suillus. Madroño 19: 148-160. (PDF)
Thiers, H.D. (1975). The status of the genus Suillus in the United States. Beih. Nova Hedw. 51: 247-278.
Thiers, H.D. (1975). California Mushrooms—A Field Guide to the Boletes. Hafner Press: New York, NY. 261 p. (WWW)
Thiers, H.D. (1979). The genus Suillus in the Western United States. Mycotaxon 9(1): 285-296. (PDF)
