Observation 209319: Boletaceae Chevall.
When: 2015-07-08

Notes: On a lawn between a large oak ans a large white pine.

Looks to be the same as obs 207985.

KOH orange on all parts, on cap deep dark orange at first then vivid orange.

Ammonia results inconsistent, varying among specimens.

Cut context in stipe quickly to green for only a couple seconds, then blue.

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Comments

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The early green stage…
By: I. G. Safonov (IGSafonov)
2016-12-21 09:23:35 CST (-0500)

…of the oxidation process could be a visual perception phenomenon rather than the actual chemical reaction producing the green color, i.e., yellow + blue = green, especially if the reaction is not very fast and/or intense. As the bluing eventually fully saturates the yellow flesh, that color will dominate the spectrum, as in any bluing bolete… I am glad we are sequencing #251141, but the preliminary data at my disposal makes me think we won’t be getting any easy answers with any of these red-pored boletes.

Yes, the exact same spot as obs 251141.
By: Dave W (Dave W)
2016-12-21 08:27:23 CST (-0500)

An unusual thing about this one (209319) was the green stage on the sliced context (preceding the dark blue). I see similarities with 251141, except that one had more red on the stipe, which could be a function of maturity.

Dave,
By: I. G. Safonov (IGSafonov)
2016-12-20 23:38:16 CST (-0500)

I am pretty much convinced this is the same mushroom as that of obs 251141. The morphology is very similar, despite the difference in age, and both collections, of course, come from the same exact spot. These do look like a member of the “subvelutipes group” in a broad sense, but not the kind of “classic” subvelutipes examples, e.g., obs 242315 and obs 242945, you’ve been collecting in the conifer-hardwood forests of the Poconos region.

I don’t think subvelutipes, here.
By: Dave W (Dave W)
2015-07-23 15:11:33 CDT (-0400)

Pore color is too yellow, stipe color too brightly yellow on the upper half, and the cut context going green all seem unusual for subvelutipes.

I think these may be the undocumented species NAB-13 seen in BRB.

Created: 2015-07-09 00:03:24 CDT (-0400)
Last modified: 2017-02-10 02:19:25 CST (-0500)
Viewed: 123 times, last viewed: 2017-06-20 09:55:53 CDT (-0400)
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