When: 2015-06-23

Collection location: Moon Lake State Forest Recreation Area, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

Photo may appear more reddish than the natural colors. Late day outdoor lighting? Too much contrast with the green moss backdrop?

This collection appears to show the variegated brown/olive on the stipe that I associate with rubrobrunneus.


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Okay, I agree Igor.
By: Dave W (Dave W)
2015-06-29 19:07:41 PDT (-0700)

I checked the collection spot today, and found no additional fbs.

Color scheme does favor violatictus. But the variegated appearance on the stipe surfaces still look like rubrobrunneus to me. I should have saved one for analysis.

They’ll be back…

Final Comment
By: I. G. Safonov (IGSafonov)
2015-06-29 11:42:43 PDT (-0700)

In Roody’s book, T. rubrobrunneus and T. violatinctus are placed side by side (pp. 340/341). The author’s choice of pictures for the two mushrooms illustrates the point that they can easily be look-alikes of each other.

Read the descriptions therein and compare with BRB. The latter reference gives a more detailed description of the stipe of T. violatinctus and mentions yellow-brown staining on lilac (not purple) or rusty-lilac background color.

Probably too much purple on the stipe…
By: Dave W (Dave W)
2015-06-29 05:20:49 PDT (-0700)

for rubrobrunneus. But there is a bit of olive seen on the apex of a couple stipes.

I’ll see about grabbing some fresh material and subject it to KOH and ammonia. But, having said this, in the past my collections of what was almost certainly rubrobrunneus has prodcued inconsistent KOH results.

At the time, I was filling up bags pretty quickly.
By: Dave W (Dave W)
2015-06-28 21:25:04 PDT (-0700)

But my general impression was they were all the same species.

How different is this collection…
By: I. G. Safonov (IGSafonov)
2015-06-28 21:22:56 PDT (-0700)

from that of obs 208055? I agree that the latter is T. rubrobrunneus — it has the right colors of the cap & stipe and the pore surface (grayish-yellow).

This is not the same collection…
By: Dave W (Dave W)
2015-06-28 21:02:30 PDT (-0700)
as obs 207765. Same general location, same day. But a different group of mushrooms. Looks to be the same species.
By: I. G. Safonov (IGSafonov)
2015-06-28 20:17:43 PDT (-0700)

I understand this is the same collection as obs 207765, but I am beginning to agree with Walter that these look more like T. violatinctus than T. rubrobrunneus.

I posted at least two collections from the NJ Pine Barrens of what I thought were T. violatinctus at the time — see obs 27199 and obs 137365. I think that anyone who looks at all the MO observations of the species can appreciate the identification dilemma raised by your collections.