Observation 255923: Boletaceae Chevall.

collected for IGS

more of these huge boletes under pines
slow staining on pore surface – slight staining on context
No KOH reaction on cap but staining orange on context

Proposed Names

-13% (2)
Recognized by sight
52% (3)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
This is not rubricitrinus
By: I. G. Safonov (IGSafonov)
2017-12-30 22:10:16 EST (-0500)

B. rubricitrinus has recently been reclassified as Pulchroboletus rubricitrinus, as per this publication: http://www.czechmycology.org/_cmo/CM69204.pdf.
The LSU sequence of this collection is very different from that of the authentic rubricitrinus collection in GenBank (MG026638).

By: Logan Wiedenfeld (LoganW)
2017-06-03 18:30:15 EDT (-0400)

… in my neck of the woods look vaguely similar, but I don’t know that I’ve ever encountered one with any reticulation on the stipe. For what it’s worth.

No name, Scott
By: I. G. Safonov (IGSafonov)
2017-06-03 18:27:42 EDT (-0400)

I would bet these are new to science, unless there is some obscure description in old literature.

So, after the DNA test & comparing with Dave’s find, do we have a name?
By: Scott Pavelle (Scott Pavelle)
2017-06-03 17:42:13 EDT (-0400)

Is rubricitrinus out of the running? Or in the running for all of the above?

An interesting development
By: I. G. Safonov (IGSafonov)
2017-04-26 22:26:20 EDT (-0400)

I was just looking at the pix in this obsie and all of a sudden it occurred to me for the first time that this bolete looks kinda similar to something that was sequenced for me before. That ‘something’ happens to be Dave W’ magnificent obs 249345 from PA.
Alignment of the two sequences in GenBank (the Needleman-Wunsch Global Align) showed that the LSU of 255923 is 100% identical to fragment 15—>980 of 249345!
It appears that Dave made several other observations of 249345 — see obs 250964, obs 250967, obs 250978, obs 250979, and obs 250980, all from the same general area in Ricketts Glenn S.P.
More tests need to be done to confirm that 249345 and 255923 are indeed conspecific. The next logical step would be to compare their ITS sequences (255923 doesn’t have one yet).

Academically speaking
By: Geoff Balme (geoff balme)
2016-11-18 13:56:37 EST (-0500)

Educated guesses are what we have! At least we should be able to see — by all rights — the closest sister groups.

Which will be great! I’m looking forward to those results.

By: I. G. Safonov (IGSafonov)
2016-11-18 13:41:57 EST (-0500)

As you know, the full barcode (ITS+LSU) will be sought for this one. Unfortunately, B. rubricitrinus is not a listed taxon in GenBank, meaning that there are no sequences there linked to the species. That one and your bolete belong to a poorly understood group of red&yellow bluing boletes with yellow pores residing outside the NA pool of iconic taxa in Baorangia and Lanmaoa. Recent phylogenetic studies have largely ignored critters from that section due to lack of reliable vouchers and difficulties in confident field identification.

Hey Igor
By: Geoff Balme (geoff balme)
2016-10-10 08:24:33 EDT (-0400)

every time I’m thinking I’m collecting some ICONIC boletes they turn out to be tricky! :) Mathew did indeed drop about 5" on us. So these may be a bit waterlogged — though they didn’t seem to be in such terrible condition.

The youngest of the caps seemed to have an orange on yellow pore surface very slowly staining. But I didn’t find any that were really inrolled or fresh. They were all a little older. These are surprisingly big ones too! I’m really not used to such large caps!

Very beautiful too – such colors! It’ll be in your hands soon, maybe you’ll get some other ideas when you actually look at it.

Cool boletes, Geoff!
By: I. G. Safonov (IGSafonov)
2016-10-09 21:37:09 EDT (-0400)

Thank you for collecting. Seems like they did pretty well in the aftermath of Matthew (didn’t you get something like 7" of rain?). The closest species I could think of is B. rubricitrinus, but there is a number of morphological characters that are not quite matching the description in NAB/BRB, including the intensity of the bluing, the color of the context and reticulation at the top of stipe. The pore surface color is solid yellow at maturity, but there seems to be some orange tones mixed in in the younger fb. Maybe it’s just some weather-induced discoloration – could you comment on that, please? What the pore surface color of the youngest fb you collected?

They were only under a pine dominated area
By: Geoff Balme (geoff balme)
2016-10-09 18:22:00 EDT (-0400)

but there were mixed hardwoods around. I’ve only recently begun to understand that associated trees may be quite a long ways away so the fact that they were nearest some pines may be moot.

Also I didn’t mean subcaerulescens I meant subvelutipes I don’t know how that got there. Long day.