Please do not re-click a link while waiting for a page to load. (It’s slower and degrades site speed for all users.)
To get images for machine learning, see MO Images for Machine Learning

Observation 4735: Agrocybe Fayod

When: 2007-09-29

Collection location: Antrim Co., Michigan, USA [Click for map]

Who: George Seder (Morelman)

No specimen available

These were growing from buried roots at the base of a dead poplar.

Of all the photos I have seen of Gymnopilus. None quite match the morphology of these specimens. The photos of Spectabilis that I have seen make me believe they are closely related though. I haven’t seen photos of overly mature Spectabilis so I don’t know for certain.

The annulus is very weak, but distinct. The caps are leathery and the mature edges of the cap are fluted. Growing from buried wood and a brown/rust colored sporeprint. I can’t look at the spores under a microscope yet. I’ll look to see if they are “warty” when I can.

I would like to name this if it proves to be a new Gymnopilus. I have some higher resolution photos if anyone wants a closer look. I think the latin “tridacna” works for these since they resemble giant clams.

I’m going to grow some on cased sawdust/woodchips. That way I can see these at all stages of development.


Going through my sporebank I made the happy discovery that I had indeed printed the two specimens that I was holding in the photo.

Proposed Names

1% (2)
Recognized by sight
55% (1)
Recognized by sight

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

= Observer’s choice
= Current consensus


Add Comment
Quite interesing!!!
By: Joshua Birkebak (Shua)
2007-11-17 14:06:39 CST (-0600)

Well that is a very interesting looking fungus! I might think agrocybe in the erebia group… I am really not sure at all… but that is the feel i get from teh photo’s… Some micro work would be great… especially the cap surface! Wow… I wish I had the supplies to grow things like you!

You go guy!
By: Douglas Smith (douglas)
2007-11-08 13:22:08 CST (-0600)

Thanks for the posting, trying to grow them again to get a better id, I just have to say – wow, I’ve never gone that far. If you can do it, post more photos here, I’d love to see how that works for you. We could have a write up – advanced id techniques.

I do have to say the spore color doesn’t quite look like Gymnopilus, which should have orange in the brown. But also the cap and stem don’t really look like Pholiota. If you are getting micro shots on this, don’t forget to look at the cell alignment on the cap surface. If the cells on the surface line up along the surface, or stand up away from the surface. Also if the cap surface seems to have a translucent gell surounding the surface cells.

By: Alan Rockefeller (Alan Rockefeller)
2007-11-05 00:04:29 CST (-0600)

I am not sure these are Gymnopilus. What color is the spore print – is that it on the stem of the one on the left? The gills don’t look rusty brown or orange as I would expect. I don’t know what genus to put it in, it looks quite a bit like Stropharia or Pholiota.