Observation 13210: Hebeloma (Fr.) P. Kumm.

When: 2008-10-26

Collection location: Kane Co., Illinois, USA [Click for map]

Who: Edulis (edulis)

No specimen available

This mushroom was found in sort of a grassy area under an oak tree in Kane County, Illinois, about 40 miles northwest of Chicago, on October 26th 2008. There was one large one, and several smaller ones next to it and nearby. The brown caps made them blend with the fallen leaves and they were tough to spot.

My thought is that this is some kind of Agaricus but I’m not sure which. I didn’t get a chance to do a spore print, and didn’t eat it.

The pictures show the gill structure, stalk and cap. I’m not sure what caused the cap to crackle like that (a dry day or two??), or perhaps that normal for this kind of mushroom.

The caps were very firm. You could even say they were hard.

I didn’t taste it, and may have smelled it, but don’t recall the smell.

Thanks for any help identifying this mushroom!

[admin – Sat Aug 14 02:01:44 +0000 2010]: Changed location name from ‘Kane County, Illinois, USA’ to ‘Kane Co., Illinois, USA’

Species Lists


Proposed Names

-63% (3)
Recognized by sight
4% (4)
Recognized by sight: looks like the gills are just starting to color…
37% (5)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
By: Edulis (edulis)
2008-10-28 17:46:36 CST (-0500)

Thanks for the comments/identification. I would never have guessed Hebeloma, just because I’m not familiar with it.

I looked up:

And I guess it might be either of those, and both are poisonous! Glad I didn’t eat it :)

I’d vote for Hebeloma…
By: Douglas Smith (douglas)
2008-10-28 14:22:31 CST (-0500)

I’d vote for a Hebeloma on these, although they can be tricky to be sure, and the photos are all that high in detail. There are a number of Hebeloma that display a cortina, for that feature doesn’t get you to Cortinarius by itself. Some say to get Hebeloma you can take the spore print and if it is rusty-brown it is a Cort., if it is just brown it is a Hebeloma. I’m not that sure about these generic def. splitting on differences in “brown” in the spore prints myself… but some claim this.

Hebeloma sp.
By: Dimitar Bojantchev (dimitar)
2008-10-28 13:03:36 CST (-0500)

Looks lika a Hebeloma sp. The dentate gills suggest that too, as well as the habitat, as described. Make sure to always note the odor, it has a critical diagnostic value.

gotta remember to look at the enlarged photo B4 tossing out an ID!!!
By: Debbie Viess (amanitarita)
2008-10-28 12:53:44 CST (-0500)

You’re right Allen, no cortina on those young ’uns. Probably not a cort, despite the gross similarity to corts that I have collected here in the West.