Observation 205757: Boletinellus merulioides (Schwein.) Murrill
When: 2015-06-04

Notes: These specimens are from a large gregarious fruiting under a 30-year old Ash tree in the front yard of a private residence. They are a tad beaten up by a torrential rain about two hours prior to this observation. Stem bruises red; fertile surface bruises dark.

Proposed Names

-1% (2)
Recognized by sight: Red stipes on specimens.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Forgot to mention…
By: Dave W (Dave W)
2015-06-09 14:09:00 CDT (-0400)

the Gypsy Moths that are currently stressing our local oak woods. These represent another species unintentionally introduced into eastern NA. We will lose some oaks on account of this. But the healthiest of the oaks will survive for the time being; the caterpillars will take their 10% (guestimate on my part). Hopefully, the same exact areas will not be infested next year.

No doubt that human behavior has affected, and will continue to affect, the balance of life on earth. Some plant/tree species will likely disappear from some places, and be supplanted by other plant/tree species. Fungi will likely adapt to, as well as help to drive a rapidly changing floral/fungal profile. It’s depressing that some species will likely be lost.

Seems reasonable to me to suppose that change within the natural world will continue to accelerate. But nobody knows exactly what will happen. Presently, each of us may appreciate what is here now, and perhaps make some small positive contribution. Nothing wrong with being a single drop in a bucket.

Disagree on most counts
By: Christian (Christian Schwarz)
2015-06-09 11:29:46 CDT (-0400)
Hyperbole or not,
By: I. G. Safonov (IGSafonov)
2015-06-09 03:12:07 CDT (-0400)

Christian, you wouldn’t deny the fact that continuous destruction/alteration of the environment around the globe — less here and more elsewhere — as the direct result of human activity of one selfish kind or another is changing the face of the planet at an alarming rate. It will eventually and irreversibly upset the natural balance of things, and mycorrhizal mushrooms will be affected, too. Conservation efforts in the industrialized part of the world, though commendable and desirable, are a drop in the bucket.
Mind you, I didn’t specifically speak of introduction of invasive trees (I was more concerned with smaller plants that colonize land faster) as means of adulterating our native habitats, but since you raised this interesting point, I leave you with this: you can keep your eucalyptus and acacia in the Golden State; we don’t need them here in the East even if they could survive our less balmy climate.

By: Christian (Christian Schwarz)
2015-06-09 01:52:52 CDT (-0400)

… went off the deep end there. Hyperbolic in the direst way.

But even assuming your Doomsday is on its way, I’ll leave this here: Two of the most common invasive trees here in California (acacia and eucalyptus) are both ectomycorrhizal hosts.

Future with no trees
By: I. G. Safonov (IGSafonov)
2015-06-08 21:40:57 CDT (-0400)

The native plants and trees in our country are under a deadly assault from foreign invaders — insects, viruses, microscopic fungi, invasive plants, etc. Our ash trees are dying, our hemlocks are dying, our beech trees are dying, our oaks are dying from Sudden Oak Death, the pitch pines are dying — all falling victim to these exotic diseases and parasites, many of which came from countries far away. The list goes on and on. Eventually, mycorrhizal fungi will become rare/extinct, too, just like their hosts, unable to escape the fate or adapt quickly enough, and the natural landscape of this country will be changed forever and permanently. So, enjoy your morels, amanitas, boletes, etc., while they last in your neck of the woods. And one fine day we’ll have to revamp ourselves as saprobic fungi experts because that’s all there will be left to ID in abundance.
Our government has betrayed/sold us out in many ways, and even this problem is in part their fault. Yes, you can lay some blame on free trade and lack of rigorous oversight and competence, corner-cutting and sheer laziness in allowing contaminated containers with foreign-made cheap crap to flood this country unabated. Should I mention climate change? Naturally, MO is not a political forum, so I am going to stop here… Admit it to yourself — it’s a very, very grim and hopeless picture…

Thanks, Dave. I appreciate your feedback.
By: Judi T. (AvidAmateur)
2015-06-08 16:33:00 CDT (-0400)

Hope there will be some trees left in PA when it’s all said and done=)

I’m not equipped…
By: Dave W (Dave W)
2015-06-08 14:41:30 CDT (-0400)

to perform advanced analysis on fungal specimens. I just enjoy trying to ID various mushrooms based on macro features and a few rudimentary micro features. But if you dehydrate the material, someone else may be interested. I’ll propose the name G. rompelii and maybe this will get someone’s attention.

We have the emerald ash borer here in PA. We also have the woolly adelgid that’s killing the hemlocks. And, there’s a blight (I forget the nature of it) that’s laying to waste many of our beech trees.

When I revisited this site, I was very
By: Judi T. (AvidAmateur)
2015-06-08 14:13:00 CDT (-0400)

careful to avoid touching the stems as I removed another 4 specimens because at least one reference I checked said that the stems can bruise red on B. merulioides. Stems were still red and had not been touched. I did check for other associates, and there is a mature Oak tree (original to the neighborhood when it was built 30 years ago) about 30 feet from the Ash. Now my curiosity is piqued. The latest specimens I collected were as small as the first batch which I had thought were just young. The largest cap measures 4 cm X 4 cm. Still within the range for merulioides, but all previous specimens I have collected in this area were larger and did not have red stipes. See my Ob. # 195479. On the other hand, “Wild Mushrooms of Missouri”, written by one of our local experts, and published by the Missouri Conservation Dept., says there are no “no-alikes” in the state. Of course, we all know how distribution is changing all the time, particularly from one neighboring state to another. So the mystery continues. I did dry the last 4 specimens. I’d be happy to send the to you, but I can’t imagine that you would have the time to take on more work.

BTW, Did you know there is an Ash borer that is currently killing the Ash tree population in Missouri (think Dutch Elm Disease). The Dept. of Conservation has forecast that there won’t be any living Ash trees in Missouri by 2020. 400 Ash trees were removed on the Arch grounds last year and the Ash trees in my neighborhood are already infected. I’ve been wondering what will happen to the Ash Tree Boletes in our state, and possible neighboring states as the borers spread and Ash trees disappear.

You’re welcome, Judi.
By: Dave W (Dave W)
2015-06-05 22:40:27 CDT (-0400)

Truth is, I learn a lot form these discussions.

Spore print for G. rompelii listed as “olive brown”, same as for merulioides. Tree association for rompelii listed as “broadleaf trees”, which would seem to exclude ash. Any other types of trees in the area?

Dave, thanks you for taking such a close look
By: Judi T. (AvidAmateur)
2015-06-05 14:44:26 CDT (-0400)

at my observation. I’ve been impressed with your discerning eye since you commented on some of my earliest posts. Your comments always make me stretch for the most accurate ID possible, and I’m appreciative of that. I’m going to return to the site of this ob today, now that the rain has finally let up. Since this was such a gregarious fruiting, I’m in hopes of collecting additional specimens for closer examination based on your comment. Do you know what the color of Gyrodon rompelii’s spore print is? Is it ever known to be associated with Ash trees? Thanks again for all your support. I always learn so much from your comments.

Judi, the red stipe…
By: Dave W (Dave W)
2015-06-05 09:52:52 CDT (-0400)

seen on the one specimen caught my attention. North Amenrican Boletes lists a species (Gyrodon rompelii) that has a red stipe. Distribution is reported as southern NA. The association with ash, for you collection seen here, seems to point toward merulioides. Still seems kinda interesting to me.

Created: 2015-06-04 21:29:14 CDT (-0400)
Last modified: 2015-06-08 16:47:04 CDT (-0400)
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