(Fries) A. H. Smith & Thiers

The velvety-tomentose pileus is some shade of gray, dark gray or gray-brown, the pores at first yellow-gray, becoming dingy gray-brown and bruising greenish-blue, then reddish-brown to blackish-brown; the stipe is colored similar to the pileus, pruinose-furfuraceous. Also known as Boletus pseudoscaber Secretan, an invalid name, it belongs to a difficult group of similar taxa and has recieved different interpretations by different authors.