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Boletus speciosus

Common Name: None

Synonyms: 

Substrate: Ground

Location: Hardwood Forests

Spore Color: Olive-brown

Pore Surface: Yellow

Comments: 

This mushroom reminds me very much of Boletus sensibilis, but it lacks the distinctive odor of that species. Another significant difference is that this mushroom has reticulation that goes well down the stem, at least over the upper half. 

Other key aspects to look for are the coloration of the cap. It should maintain reddish-pinkish colors well into maturity. With age it may pick up some olive brown shades that can be seen in the second picture on the right. The stem should be yellow on the upper portion and red on the lower portion. 

A final key fact to look for is that all areas of the mushroom should bruise quickly and deeply blue. 

Scientific name - "speciosus" = "showy"

Chemical Reactions:

NH4 – Cap: Greenish yellow
KOH – Cap: Light purple. (Context: Orange)
Fe – Cap: Slight gray (Context: Grayish)

Lookalikes:  

Boletus sensibilis has similar colorations and bruising. Unlike this mushroom, it has the smell of curry and does not have reticulation going down most of the stipe. Boletus pseudosensibilis also lacks the curry smell, but has a blue to purple reaction on the cap to ammonia.  Boletus rubissimus does not bruise or bruises only weakly. Boletus speciosus var. brunneus has a reddish brown or yellow-brown to olive-brown cap.

Pictures:

Boletus speciosus

Boletus speciosus

Boletus speciosus

Boletus speciosus

9/16/12 - Leonard Springs - Bloomington, IN