Described from a collection made in the Sierra Nevada of California as Boletus coccyginus (Thiers 1975), later transferred to the genus Hortiboletus (Frank et al. 2020).
Hortiboletus coccyginus is a small to medium-sized bolete with an evenly rosy red to pink cap, yellow pores, and flesh that typically doesn’t stain blue. An uncommon species; known from ~20 locations in western North America.
Known from from both coastal and montane forests from central California north to Washington, east into Idaho, USA.
Population is widespread but disjunct for this uncommon species. Although there are relatively few records (<30) of this species, it appears to be stable, with a number of recent records as habitat, ecology and range become better known.
Population Trend: Stable
Solitary, scattered, or in small clusters on ground in mixed forests. Ectomycorrhizal with a wide range of associates; Douglas-fir (Pseudotsuga menziesii), Tanoak (Notholithocarpus densiflorus), and Coast Live Oak (Quercus agrifolia) on the California coast, reported from under conifers in the California mountains. Most of the Pacific Northwest collections were from Cottonwood (Populus) forest. Fruiting in fall.
No direct threats have been identified.
Continued reporting of collections on sites like iNaturalist will provide a better understanding of range, ecology and abundance of this species.
Edible, but rarely collected for food.
Frank J.L., Siegel, N., Schwarz, C.F., Araki, B. and Vellinga, E.C. (2020). Xerocomellus (Boletaceae) in western North America. Fungal Systematics and Evolution 6: 265–288
Siegel, N. and Schwarz, C. 2016. Mushrooms of the Redwood Coast: A Comprehensive Guide to the Fungi of Coastal Northern California. Ten Speed Press, Emeryville, CA.
Siegel, N., Vellinga, E.C., Schwarz, C., Castellano, M.A. and Ikeda, D. (2019). A Field Guide to the Rare Fungi of California’s National Forests. Bookmobile: Minneapolis, MN. 313 p.
Thiers, H.D. 1975. California Mushrooms—A Field Guide to the Boletes. Hafner Press, New York, NY.