Observation 77852: Hypsizygus ulmarius (Bull.) Redhead
When: 2011-10-02
No herbarium specimen

Proposed Names

-29% (3)
Recognized by sight
63% (10)
Eye3 Eyes3
Used references: KUO
Based on microscopic features: http://globaltwitcher.auderis.se/...
Based on chemical features: http://ru.wikipedia.org/...
-27% (6)
Recognized by sight: Too scaly for Hypsizygus. H. populnea has whitish gills when young.
-3% (7)
Recognized by sight

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
definitely box elder
By: Tom Volk (TomVolk)
2011-10-14 12:42:09 CDT (-0500)

It’s a scrub tree not very good for collecting fungi, except for Hypsizygus ulmarius. Opposite compound leaves.

Tree ID?
By: IntoTheFlames
2011-10-14 12:16:20 CDT (-0500)

So this is indeed a box elder?

Thanks, Tom.
By: Daniel B. Wheeler (Tuberale)
2011-10-14 01:40:21 CDT (-0500)

All of the ash trees I have seen have many more leaflets. But I am totally unfamiliar with box elder.

I’ve grown Hypsizygus ulmarius, but on sawdust blocks prepared by Ed Foy at the Oregon Mycological Society. It does not have a cracked stipe when there is enough water to support expansion.

I suppose I shouldn’t be surprised. Enokitake looks very little like Flamulina velutipes when I find it wild. In fact Enokitake never has a fuzzy stem that I have seen.

knothole of box elder = Hypsizygus
By: Tom Volk (TomVolk)
2011-10-13 22:37:19 CDT (-0500)

Here in the upper midwest, Hypsizygus is almost exclusively on knot holes of box elder (Acer negundo, which like all Acer [including maples] has opposite leaves), but sometimes on other parts of downed box elder. If the weather is dry (or especially alternating wet and dry) it often ends up looking cracked and scaly. This is pretty typical Hypsizygus ulmarius on pretty typical box elder.

Can’t go by host species alone.
By: Daniel B. Wheeler (Tuberale)
2011-10-08 13:23:33 CDT (-0500)

Many many mycologists have not indicated what host trees fungi were found fruiting on. For a long time, it was not considered important enough to include. Then species specificity was discovered, mostly in relationship to mycorrhizal fungi, and everything changed again. Many otherwise knowledgeable mycologists to this day do not include the tree species of fungi they have found.

Neolentinus, Lentinus and Lentinula fall into that category. Unless you have grown these fungi, it may be difficult to understand just how many tree species can be host to a mushroom.

For example, while White oaks are often touted for growing Lentinula edodes, that mushroom will fruit on a wide variety of tree species. I have personally grown it on Quercus rubra, Quercus garryana, Alnus rubra. But perhaps most odd is its fruiting on Tsuga heterophylla. In Japan another Tsuga is also a favored bedlog.

Is this the exception or the rule? Until far more cultivation experiments are carried out, there really is no way of knowing for certain.

By: Drew Parker (mycotrope)
2011-10-08 10:17:47 CDT (-0500)

The non-poplar host does seem to eliminate P. populnea (=P. destruens), but I still can’t see it as a Hypsizygus. Neolentinus lepideus, though maybe possible, would be very unusual since it mainly fruits on conifer wood, and not on living trees as far as I know.

Certainly similar to ash, at least.
By: Daniel B. Wheeler (Tuberale)
2011-10-08 00:09:56 CDT (-0500)

Not an ash species I am aware of, which usually has more than 3 leaves in a group. But I’m mostly unfamiliar with Minnesota flora anyway.

Neolentinus lepideus seems a much better fit, too. Not sure of the stipe striations, but those could be habitat-affected from a lack of ready moisture except from the substrate. The tree damage seems consistent too with the scar visible with the mushroom.

not so horrible at tree ID…
By: Debbie Viess (amanitarita)
2011-10-07 11:30:15 CDT (-0500)

those leaves look ash-like to me, too; certainly not poplar, which don’t divide into leaflets like this one.

Dan is correct; there is obvious white spore-drop under that mushroom; also, exposed on a limb like that, even a smooth fruit body is gonna get a bit weather-beaten.

On the other hand, geez, aren’t there some chores to do, somewhere, for y’all?

It’s only a mushroom ID, after all…(here come the slings and arrows….!) ;)

Tree ID / Veil
By: IntoTheFlames
2011-10-07 10:18:27 CDT (-0500)

I’m horrible at identifying trees so I’ve added a pic of the leaves.

I don’t think it’s a Poplar though.

Maybe an ash?
I see no veil present, with the exception of what could be remnants of the universal veil on the cap.

Can’t support Pholiota
By: Daniel B. Wheeler (Tuberale)
2011-10-07 08:39:19 CDT (-0500)

If you blow up the first photo, there are obvious white spores under the cap at the base of the stipe. There is no indication of the brown or rusty-brown spores Arora says should be from Pholiota.

Second: has the tree been identified as a poplar? I don’t see it. Looks more like oak or maybe sycamore to me.

Third: Only thing similar to Pholiota populnea I can find in Arora is P. destruens, which I’m familiar with. This should have stalk 1-3cm thick. This observations appears to be much thicker.

I’m still thinking Lentinus ursinus is a better fit. Yes, there are scales on the stipe, but they don’t appear to be different colored than the stipe: more concolorous I would say. Are there erect scales on the cap? I don’t see them. Looks to me more like appressed scales or at the very least flattened scales.

I’ll admit I haven’t searched out Pholiota much, but what I’ve seen in mushrooms shows doesn’t look at all similar to this observation.

Observation appears to have whitish gills, whitish spores in mass, and with no visible volva at the base of the stipe. Veil? Too distant for me to make out.

In Maturation…
By: IntoTheFlames
2011-10-07 07:19:24 CDT (-0500)

The cap has darkened and appears more plane-like. Will try to get more pics up today. The mushroom is about 15 feet off the ground. Despite what you can see in the pics it’s actually on a limb branching off the main body.

Myxomop! Others!
By: IntoTheFlames
2011-10-04 18:59:32 CDT (-0500)

In regards to “cluttering” up this observation – who cares? That’s why the function is there for and, personally, I’m thrilled to get comments about anything sent from this site. I was laughing with a buddy at work about the do it / don’t do it issue until it turned ugly.

/don’t give up!
By: IntoTheFlames
2011-10-04 15:25:30 CDT (-0500)
/gives up
By: Danny Newman (myxomop)
2011-10-04 14:00:48 CDT (-0500)
Use the buddy system!
By: Britney Ramsey (Riverdweller)
2011-10-04 13:29:25 CDT (-0500)

If I were you, I’d be steaming at the thought that I couldn’t get that shroom!
Sleepless nights would follow, laden with schemes and dreams of victory in the bag. :)

Ladder? Good friend? Stranger who’s bored?

I wouldn’t pay much attention to the hijacking of your observation. I think it’s a pretty cool find! Good luck to you!

Coo-Coo Cake
By: IntoTheFlames
2011-10-04 13:27:29 CDT (-0500)

First off, I want a piece of cake.

myxomop: figured it was tongue-in-cheek. I get what you’re saying. Carry on, sir.

By: Danny Newman (myxomop)
2011-10-04 13:11:22 CDT (-0500)

this is beyond ridiculous. the thinly veiled death threats in private correspondence are the icing on the coo-coo cake. it’s not about my comment on high-risk mushroom hunting (which was the theme of the prior three comments), it’s about your seething hatred for the whipper snapper that has called you out on your caca over and over again, to which you have had little to no sober refutation, only character attacks decorated with high logic terminology.

you have carried this axe around to two unrelated observations so that you may grind it in everyone’s face. we call that trolling, The Dan Molter. please give this willful pollution a rest.

ps: ITF, i know you didn’t threaten anyone. As someone who has dug through the MO dump pile on several occasions, I’ve seen so many orphaned observations that just weren’t eye-catching or thorough enough to engage the usership. I was musing at one possible (and largely satirical) method of gripping an otherwise ungripped audience for the sake of obtaining an ID. tongue-in-cheek, friend. carry on.

note to all…
By: Debbie Viess (amanitarita)
2011-10-04 13:08:09 CDT (-0500)

time to pull in our collective claws. myself included.

can we blame the water? maybe the stars? Republicans? Obama? Al Queda? Somebody?

nope, just ourselves.

this observer DID ask if he should climb the tree, so why not expect comments, whether you agree with them or not?

as long as piranhas can’t climb trees, your friend was prob. safe Danny, unless he is particularly uncoordinated, in which case…quick weight loss program! ;)

and sometimes, the wisest course of action is to not do the stupid thing. just sayin’…if there is a happy ending, NBD. If not? You make the Ignoble Awards, and your family sad.

note to self:
By: Danny Newman (myxomop)
2011-10-04 12:32:26 CDT (-0500)

threaten to go to unsafe extremes to better photograph out of reach mushrooms, the accompanying observation for which has so far been generally neglected. community will then exhaust all ID possibilities to prevent perceived mushroom hunting harm.


observer creates observation of nondescript fungal dot at bottom of lava filled crater.

  • two days elapse *

observer: I think it’s a stinkhorn, but it’s so far down in that active volcano. who says I just climb down there and snag it? i’m gonna go get it.

user 1: Phallus volcanicus!
user 2: Yea, Phallus volcanicus! Sure thing!
user 3: or Phallus geothermophilus. Quite possibly P. geothermophilus!

of course, i say climb the tree… for science!

Brian here left a perfectly good canoe to collect something bright and fungal on a log jutting out over piranha- and cayman-infested waters. you’ve just got gravity to worry about.

nice find…
By: Debbie Viess (amanitarita)
2011-10-04 10:27:00 CDT (-0500)

don’t climb the tree.

By: damon brunette (damonbrunette)
2011-10-04 06:07:52 CDT (-0500)

Lentinus ursinus?….“similar” like with a stalk maybe…


I’d encourage you not to try collecting this, except maybe with a pole pruner.
By: Daniel B. Wheeler (Tuberale)
2011-10-04 00:20:51 CDT (-0500)

That tree is damaged extensively. See the scar below the mushroom? That’s probably where the actual fungus is growing from.

Not brown nor brown spored. If you blow the photos up, you can see whitish gills along with striated lower stipe. Don’t think it is Volvariella nor likely to be Pholiota, which would have different colored gills. I’d go with Lentinus ursinus or something similar, but haven’t heard of it from Minnesota.

If the specimen is 12 feet or so up, you probably could get it with an extension pole-pruner with a saw attachment at the top. You’ll cut part of the stipe, but its much safer than climbing what patently is NOT a sound tree.

By: IntoTheFlames
2011-10-03 20:27:10 CDT (-0500)

…that mushroom comes down. The tree’s a little iffy but should be safe enough. Hey, it /is/ for science, after all.

and when you get there
By: Danny Newman (myxomop)
2011-10-03 19:58:18 CDT (-0500)
Climb the tree…
By: Noah Siegel (Noah)
2011-10-03 19:56:35 CDT (-0500)

What is it growing on? Box-elder? If it is brown spored I would go with Pholiota populnea or something similar. White spored, Hypsizygus maybe. Need better pictures.

By: IntoTheFlames
2011-10-03 15:24:21 CDT (-0500)

This one’s driving me nuts. Distinctly scaly, striated stipe. Bulbous. Who votes I just climb the darn tree and attempt to get some better pics and spore print?

Created: 2011-10-02 17:55:28 CDT (-0500)
Last modified: 2011-10-14 18:59:33 CDT (-0500)
Viewed: 1035 times, last viewed: 2016-10-26 11:23:08 CDT (-0500)
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