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Boletus spadiceus var. gracilis

Boletus spadiceus var. gracilis

Common Name: None


Substrate: Ground

Location: Hardwood Forests

Spore Color: Olive-brown

Pore Surface: Yellow becoming olive


The cap on this species is "yellow-brown, somtimes with reddish tints" according to the Bessettes (2000). The surface is slightly velvety (subtomentose) and will sometimes crack with age. The context of the cap is white, yellowing a bit near the tubes. It will sometimes have a brown line under the skin of the cap with age. There should be no bruising, or sometimes a slight bluing near the margin of the cap.

The stem is yellowish, with red fibers towards the base. You can confirm the ID using the chemical reactions listed below. 

Chemical Reactions:

KOH: dark red
NH4: Green flash to yellow-red leaving a purple band
Iron Salts: dark (nearly black).


Boletus spadiceus has a thicker stem and larger cap. 


Boletus spadiceus var. gracilis

9/13/12 - Brown County State Park - Nashville, IN