Observation 73608: Boletus oliveisporus (Murrill) Murrill

When: 2011-08-07

Collection location: Brendan T. Byrne State Forest, Burlington Co., New Jersey, USA [Click for map]

39.88097° -74.53286°

Who: I. G. Safonov (IGSafonov)

No specimen available

A single specimen growing in a tight space formed by 5 birch trees and surrounded by mature pines.

Proposed Names

85% (1)
Eye3 Eyes3
Recognized by sight: Though more brown than should be expected for its age, it’s very similar to obs 25138 and obs 73607

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
B. oliveisporus
By: Jason Bolin (j.bolin@outlook.com)
2017-10-28 13:13:53 CDT (-0400)

Yep, Observation 208605 does look dead on with yours regarding color. I’ll keep my eye out for some older specimens. I have been lucky enough to find mostly prime condition examples.

By: I. G. Safonov (IGSafonov)
2017-10-28 01:16:35 CDT (-0400)

Sometimes I find them like this, especially if the stipe surface is very dry. M. Kuo says this about the stipe colors:“…yellow at the apex and brown at the base, often with a pinkish red zone in between; appearing finely punctate; becoming brown overall from the base up…”. This is in line with the appearance of the fb in this observation.
I don’t know if there is a morphological difference between textbook collections from the south and those from the extreme northern distribution range (NJ), but nrLSU of obs 208605 is identical to that of oliveisporus from Texas (#KF030254).

By: Jason Bolin (j.bolin@outlook.com)
2017-10-28 00:39:57 CDT (-0400)

I am aware of the darkening when handled or cut… it very quickly turns that drab brownish color. But your pictures are in situ and I was wondering if this is typical of older northern collections. Southern collections look much different, even in age.

Dark coloration
By: I. G. Safonov (IGSafonov)
2017-10-28 00:13:23 CDT (-0400)

and drab brown colors are typical of this species as it gets old. Fresh specimens also discolor quickly after heavy handling and/or letting them mingle in the basket with other mushrooms (bluing changing over to brown).

B. oliveisporus
By: Jason Bolin (j.bolin@outlook.com)
2017-10-27 23:58:07 CDT (-0400)

Igor have you found additional collection showing this dark coloration?

Created: 2011-08-08 01:12:20 CDT (-0400)
Last modified: 2017-10-28 00:59:31 CDT (-0400)
Viewed: 99 times, last viewed: 2018-02-27 16:47:22 CST (-0500)
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