Peppery Bolete
The smallest California bolete, and now segregated into a new genus Chalciporus (its synonym is Boletus piperatus).
Recognizable due its small stature. The intensely acrid, unpleasant taste is diagnostic.
Under Monterey Pine at Fiscalini Ranch Open Space, 12/15/12 — Photo Courtesy of CNPS Fungal Foray participant Michelle C. Torres-Grant. View a full selection of images at Michelle’s Flickr collection from the 2012 CNPS Fungal Foray.
Mykoweb provides a complete description of Chalciporus piperatus
Michael Kuo’s page for Chalciporus piperatus at MushroomExpert.