Atkinson's Bolete
Boletus atkinsonii
Basidiomycota > Boletales > Boletaceae > Boletus atkinsonii
The Atkinson's Bolete is a soft, fleshy mushroom with a separatable pore surface on the underside of its cap. The cap top surface is brownish and the flesh of the cap is white. The pore surface begins white color and later becomes yellow. It has a net-like pattern on its stem, which is indicative of the genus Boletus. It is associated with broadleaf trees east of the Rocky Mountains. Interestingly, it has a pinkish-to-purpleish reaction when ammonia is applied to the cap surface.
June 14th, 2023 Field Notes
Growing gregariously from soil on open oak/hickory woodland ridge near American Hophornbeam, Chinkapin oak, Black Oak, and ash. Ammonia flashes pinkish instantly around the area of contact. Portions of the cap (margin) and stipe slowly staining pinkish when handled. White pore surface, tan-brown cap.
August 2019 Field Notes
Found growing amongst red oak, chinkapin oak and ironwood trees.
Short and stout boletes with cream-white pore surface and prominent reticulation down the thick stem. Flesh unchanging when cut/bruised. Ammonia on the cap resulted in a spreading pink reaction.
References
Boletus atkinsonii Peck, Bulletin of the New York State Museum 94: 20, R (1905) [MB#203845]
Kuo, M. (2017, May). Boletus atkinsonii. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/boletus_atkinsonii.html