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When: 2016-05-13

Collection location: Umstead State Park, Raleigh, North Carolina, USA [Click for map]

Who: Geoff Balme (geoff balme)

No specimen available

Can we call that a “brown reticulation”?


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By: Geoff Balme (geoff balme)
2016-05-14 13:22:33 CDT (-0500)

I see what you mean.

Thank you folks so much for examining this thing so carefully. I learn a lot from you folks!

I thought dry weather…
By: Dave W (Dave W)
2016-05-14 07:45:52 CDT (-0500)

may have contributed to the scruffy surface on the upper stipe. Sometimes a reticulatum breaks apart . Examples of T. felleus with broken/incomplete/indistinct reticulatum are not uncommon. obs 142970, obs 140444

By: Geoff Balme (geoff balme)
2016-05-14 07:24:36 CDT (-0500)

And I meant to say that it hasn’t been particularly dry. In fact we’ve been getting regular, basically daily, thunderstorms.

I have seen mycorrhizal mushrooms…
By: Dave W (Dave W)
2016-05-14 07:18:45 CDT (-0500)

fruiting from the bases of live trees. Suillus spraguei commonly does this. I have seen it with Corts. The mycelium apparently crawls up the tree, I suppose under the bark.

hey Dave!
By: Geoff Balme (geoff balme)
2016-05-14 06:22:13 CDT (-0500)

While it does look like plenty of critters have attempted to appreciate its fine flavors I did not put any on my tongue.

Also, I’m wondering if the bases of these trees – thick with rugged bark – are “dead enough” at least on the surface to provide a good habitat.

On the lower photo…
By: Dave W (Dave W)
2016-05-13 22:55:14 CDT (-0500)

I can see reticulations on the lower portion of the stipe (zoom). I think it’s possible the upper stipe surface did not develop in a normal way. Has the weather there been dry, Geoff?

Looks like T. felleus to me. Like Igor says, this species in not uncommon on wood, although the growth on a living tree seems very unusual.


I looked at T. Felleus
By: Geoff Balme (geoff balme)
2016-05-13 10:22:03 CDT (-0500)

and basically was puzzled by the lack of reticulation.
But I like your experiential observations! This seems a likely fit!

we should write it up: T. felleus Var. horizontalus

T. felleus is known…
By: I. G. Safonov (IGSafonov)
2016-05-13 10:18:51 CDT (-0500)

…to grow on decayed wood and at bases of trees — I’ve observed this a few times myself. Naturally, as it’s a mycorrhizal fungus, not a wood decomposer. It’s also the first Tylopilus species to appear in NJ, popping up as early as second half of May in the Pine Barrens. I think this could be it, though the absence of prominent reticulation even at this stage of development is puzzling.

By: Geoff Balme (geoff balme)
2016-05-13 10:12:37 CDT (-0500)

That mushroom is growing out of a live Loblolloy pine. I was hoping that would tip the species off, but I guess it’s an oddball! :)

Yeah I thought I"d be stretching the definition of reticulation it just looks kind of fuzzy.

on wood??!
By: Debbie Viess (amanitarita)
2016-05-13 10:05:55 CDT (-0500)

well-rotted stump, adjacent to host tree?

not “reticulation” which is a netting that is overlaid on the stipe. This is just a blush of brown color.

very curious fruiting habitat for a bolete!