I. G. Safonov’s Description of Boletus oliveisporus (Murrill) Murrill

Title: Safonov (Default)
Name: Boletus oliveisporus (Murrill) Murrill
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Description status: Unreviewed

Taxonomic Classification:

Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Boletales
Family: Boletaceae

General Description:

This is a medium to large bolete that is associated with various conifers. In the south it grows with loblolly and longleaf pines and in the NJ Pine Barrens it’s mycorrhizal with the pitch pine, Pinus rigida. In the latter habitat, these can be found from late July into early September, usually as single sporocaprs, sometimes in small scattered groups.

- The cap is convex, up to 7" in diameter, becoming flatter with age. Reddish-brown to brown in age, instantly bruising blackish-blue upon handling/injury. – The pore surface is yellow, instantly bruising blue and resolving brown.
- The stipe is up to 5" long, enlarging toward the base. It’s tri-color: yellow at the apex, brown in the middle and red below. In age or if handled sufficiently, the entire stipe turns brown.
In the end the entire mushroom turns brown and becomes difficult to ID. The context is pale to medium yellow, instantly turning vivid blue upon oxidation, but within a few minutes brown coloration takes over from the bottom of the stipe up.

Diagnostic Description:

Boletus pulverulentus is allegedly similar, but has a smaller habit, smaller spores, and different macrochemical tests. (mushroomexpert.com; the bolete book by B-R-B, vide infra)


Found predominantly along the Gulf cast and Southeastern Atlantic Coast (Kuo); NJ south to FL, west to TX (Bessette-Roody-Bessette)


In sandy soil of the NJ coastal plains under pitch pines; presumably in similar habitats elsewhere.

Look Alikes:

Boletus pulverulentus


No general info on uses by people. Edibility unknown. Uses for dyeing of fabrics unknown.


1) Michael Kuo’s mushroomexpert.com
2) “North American Boletes” by Bessette, Roody, Bessette


This name is valid: the species was originally described by Murrill in 1945, followed by a report by Singer.
Common misuses unknown; more appropriate names unknown.

Description author: I. G. Safonov (Request Authorship Credit)

Created: 2014-06-19 14:39:43 PDT (-0700) by I. G. Safonov (IGSafonov)
Last modified: 2014-06-19 14:42:28 PDT (-0700) by I. G. Safonov (IGSafonov)
Viewed: 36 times, last viewed: 2019-05-21 09:37:39 PDT (-0700)