Observation 208605: Boletus oliveisporus (Murrill) Murrill
When: 2015-07-02

Notes: > A single large and robust basidiome growing on the edge of a trail in mixed pitch pine & oak woods in the Speedwell section of FPP.
> I’ve posted this species several times on MO — all collections are from the NJ Pine Barrens.
> This is the earliest fruiting I have ever observed.
> The cap of this young specimen was almost 5" in diameter; the stipe was ~7" long and 1.5" wide.
> This material has been preserved.

DNA Sequencing Discussion:
> A clean and contiguous 1368 bps nrLSU sequence has been obtained for this material [the first 70+ bps from the beginning of the LSU region are missing; also there is one Y character corresponding to the nucleotide ambiguity code for either of two the pyrimidine bases, cytosine © or thymine (T)].
> A GenBank BLAST search of the full-length sequence returned no meaningful hits.
> A GenBank BLAST search of a 903 bps sequence fragment returned a nearly perfect match (867/868 bps overlay, 99.9% identity match) to Boletus oliveisporus voucher DPL6823 [accession #KF030254]

Proposed Names

89% (2)
Eye3 Eyes3
Recognized by sight
Based on chemical features: a 99.9% identity match to the nrLSU sequence of a B. oliveisporus voucher in GenBank

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
DNA discussion posted
By: I. G. Safonov (IGSafonov)
2016-01-28 05:41:37 GMT (+0000)

LSU sequencing confirms that this is indeed B. oliveisporus.

By: I. G. Safonov (IGSafonov)
2015-07-04 20:55:51 BST (+0100)

According to Wu et al. (2014), Cyanoboletus (clade 48) and Lanmaoa (clade 49) are very closely related.

Eva, I have collected pulverulentus…
By: Dave W (Dave W)
2015-07-04 20:35:38 BST (+0100)

that is clean and dry. obs 170957

B. pulverulentus
By: Eva Skific (Evica)
2015-07-04 19:53:45 BST (+0100)
is slimy and dirty this one look clean
I should be able to get you…
By: Dave W (Dave W)
2015-07-04 19:00:01 BST (+0100)

collections of pulverulentus.

Yes, Dave,
By: I. G. Safonov (IGSafonov)
2015-07-04 18:49:43 BST (+0100)

all components of this mushroom bruise deep blue, including the cap cuticle; the pores are exceptionally sensitive — you can drag a hair across the bright yellow surface and it will blue. The flesh immediately stains blue first and then transitions into brown after a few minutes. Kuo says C. pulverulentus is similar, but stains green-blue, and is much smaller in size.
It’s on my wish list for sequencing.

Igor, does this…
By: Dave W (Dave W)
2015-07-04 18:23:52 BST (+0100)

bruise like crazy? Lots of black, and other shades, all parts? Wondering how close it is to pulverulentus.

Common in the Barrens
By: I. G. Safonov (IGSafonov)
2015-07-04 03:01:18 BST (+0100)

This mushroom is an amazing blue stainer, especially on the pore surface. According to a Texas field guide, it’s edible. I haven’t tried it, thought it’s tempting. The flesh is dense and a single large mushroom can easily make a meal. :-)

Nice Find
By: John Plischke (John Plischke)
2015-07-04 02:56:26 BST (+0100)

I hope to see this one someday

Created: 2015-07-03 21:53:16 BST (+0100)
Last modified: 2016-01-28 05:40:40 GMT (+0000)
Viewed: 106 times, last viewed: 2016-10-25 01:20:09 BST (+0100)
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