Observation 131537: Marasmius oreades (Bolton) Fr.
When: 2013-04-08
Collection location: Braga, Portugal [Click for map]
Herbarium specimen reported

Notes: On a city garden under a Acer negundo. Cap diam. max. 4 cm, stem max. 3.5 cm. Odd smell. Tough stem.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Well
By: Elsa (pinknailsgirl)
2013-05-27 16:15:46 PDT (-0700)

the probability is minimal. In fact it is much different seeing the picked mushroom and in a dry day, than seeing the same (kind of) mushroom days after on place and under rain.

They were together, smelled the same, the habitat is correct for Marasmius oreades. I’d never seen it before, so I didn’t know but I’m convicted that they are the same sp.

not to be a pest but….
By: Britney Ramsey (Riverdweller)
2013-05-27 16:02:20 PDT (-0700)

Your first two photos look different from the next two and those first four look different than the habitat shots. I think Gymnopus is correct for the first two and Marasmius is correct for the rest.

I did research in my literature and on the net.
By: Gerhard Koller (Gerhard)
2013-04-11 09:58:55 PDT (-0700)

It is Marasmius collinus but some doubt it is a good species. It really looks very similar but the stipe is cavernous and breaks with a plop, the odor is more like Lepiota cristata (others say like Inocybe fraudans), the margin of the cap is never cannellate and it is said to be toxic. Never seen it myself though and the last find in Austria dates back to the 80’s.

Gerhard
By: Byrain
2013-04-11 09:39:51 PDT (-0700)

“Nevertheless there is a poisonous look-alike but it is very rare and I think more in the mountain meadows.”

I’m very curious what this species is, if you remember can you update this observation or let me know otherwise? :)

Cianide, now I’m fully convinced!
By: Gerhard Koller (Gerhard)
2013-04-11 05:00:45 PDT (-0700)

That is the smell of M. oreades. And despite its nauseous smell it is indeed a very good edible. The smell evaporates through cooking. It is especially good in soups.

Ah ok
By: Elsa (pinknailsgirl)
2013-04-10 17:05:39 PDT (-0700)

So many time looking for this and now that I found it, I’m asking myself how can someone eat it with this smell…and it’s said to be good!

I found this very interesting too “Marasmius oreades is the fruiting body of a saprophyte that can live for 1,000 years if conditions are right, so long-life in a mushroom is not restricted to some ectomycorrhizal species. Marasmius oreades is known as the “Fairy Ring” mushroom because starting from an initial point it grows outward forming a larger and larger ring each year. The grass will be a darker green where the mycelium is active. By knowing how much the ring expands each year and photographing Fairy Rings from the air near Stonehenge England, scientists were able to estimate that some of the mushroom organisms there were 800 to 1,000 year old.”

And that the smell of many mushrooms including M. oreades comes from the Hydrogen cyanide found on them.

Fascicles I meant.
By: Gerhard Koller (Gerhard)
2013-04-10 16:06:16 PDT (-0700)

In bundles, caespitose, in clusters, like Hypholoma FASCICULARE.

fascicules?
By: Elsa (pinknailsgirl)
2013-04-10 15:43:52 PDT (-0700)

What do you mean with that?

Yes, should think so.
By: Gerhard Koller (Gerhard)
2013-04-10 15:38:35 PDT (-0700)

And I am convinced.
Nevertheless there is a poisonous look-alike but it is very rare and I think more in the mountain meadows. Also there is a similar mushroom Gymnopus oreadoides but that grows in fascicules.

The first and the second
By: Elsa (pinknailsgirl)
2013-04-10 15:17:20 PDT (-0700)

specimens smells the same. The first was a new one, the second an older one. But I read thousands of different M. oreades smell descriptions, and by appearance that’s it, don’t you think?

With the added photos
By: Gerhard Koller (Gerhard)
2013-04-10 15:00:11 PDT (-0700)

it is clear now.
Maybe the first fruitbody was old and started to smell bad?
Although there is a species close to Marasmius oreades with which it can be confused. If I would remember now the name of it …

Marasmius oreades
By: Elsa (pinknailsgirl)
2013-04-10 13:43:00 PDT (-0700)

smells like pulp mill?

I do not know
By: Gerhard Koller (Gerhard)
2013-04-10 04:15:59 PDT (-0700)

Gymnopus graveolens and G. herinkii yet. Try to compare it with them. But there are not even good photos available. But do not send me this for microscoping ;)

Of course.
By: Gerhard Koller (Gerhard)
2013-04-10 04:10:37 PDT (-0700)

I know Vladimir Antonin personally. But since I am not into Marasmioidae except Marasmius itself (I mean not really specialized) I didn’t have the paper. Now I do ;)
Thx for the link.

I was looking for G. impudicus
By: Elsa (pinknailsgirl)
2013-04-10 03:50:18 PDT (-0700)

info and found this keys… you probably know it already, but it can be useful for others.

http://caps.ceris.purdue.edu/webfm_send/253

Seems like.
By: Gerhard Koller (Gerhard)
2013-04-10 03:29:57 PDT (-0700)

Maybe I should change the name to sensu me ;)

Fries
By: Irene Andersson (irenea)
2013-04-10 03:08:07 PDT (-0700)

described impudicus growing on the ground around pines. Where I have found it is on litter and cones of spruce and pine – definitely not termophilous locations.

I doubt that we have seen the same species..

The Gymnopus impudicus which I mean
By: Gerhard Koller (Gerhard)
2013-04-10 02:14:55 PDT (-0700)

I rarely find with pines. I found one at the margin of a small scope of oaks and hornbeams and maples in very thermophilous climate zone. Sometimes pines are present too but not at all locations. Once I found one with mammoth tree. But all localities have one thing in common: thermophilous.

It doesn’t
By: Irene Andersson (irenea)
2013-04-09 23:46:19 PDT (-0700)

look like the impudicus I know from coniferous woods (mainly pine).
But I suspect that there are several different species hiding under that name..

Finally
By: Elsa (pinknailsgirl)
2013-04-09 13:21:59 PDT (-0700)

I can describe the odor with the help of this site (pulp mill) http://www.asturnatura.com/...

the problem is that the color and shape are not like G. brassicolens.

Spore print white
By: Elsa (pinknailsgirl)
2013-04-09 00:50:26 PDT (-0700)
It could be
By: Elsa (pinknailsgirl)
2013-04-08 15:20:49 PDT (-0700)

because I’m trying a spore print and 4 hours later there’s nothing yet, I put some black paper under it now.

Or faintly like old cabbage?
By: Gerhard Koller (Gerhard)
2013-04-08 15:14:57 PDT (-0700)

I suspect it to be something like Gymnopus impudicus.

Yes, I know that
By: Elsa (pinknailsgirl)
2013-04-08 14:56:52 PDT (-0700)

It’s just for the record. No, the smell is unpleasant, I’m not sure if I know to describe it, let’s see… pungent, as radish+anise the first feeling was that it smelled like coins.

Has it a strong farinaceous smell?
By: Gerhard Koller (Gerhard)
2013-04-08 14:10:58 PDT (-0700)

Just for the record:
at least in Europe Acer spp. is not mycorrhizal. From a mycological standpoint of view Acer is among the most unnecessary trees concerning classic mushrooms. But it hosts a wide range of pyrenomycetes.

Created: 2013-04-08 10:43:55 PDT (-0700)
Last modified: 2013-06-19 10:06:08 PDT (-0700)
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