Observation 238701: Agrocybe Fayod

A small troop fruiting in a pile of mixed leaf litter and woody debris next to a very rotted fallen log in mixed woods, mostly Oak and Hickory. This observation was noted on a foray with friends (see additional posting # 238673) but none of us could identify it immediately. Caps whitsh/cream/pale yellow with yellowish umbo and wrinkled with some cross-veining. Gills appeared to have been lighter at one point but now colored brown with spores. Also appeared separated from stipe (perhaps since these were older specimens), but evidence of some attachment can be seen in the thumbnail image. Interesting and persistent skirt ring. Copious mycelium/rhizomes at base of stipe. Odor mild, somewhat fragrant. KOH on cap a slightly greenish gray (see last image). Obtained a chocolate-brown spore print, not reddish at all. Unfortunately, I inadvertently pitched the specimen dimensions which were written on the paper plate when I checked the spore print and found the cap et al had become a “maggot fest.”


Copyright © 2016 Judi Thomas
Copyright © 2016 Judi Thomas
Copyright © 2016 Judi Thomas
In situ
Copyright © 2016 Judi Thomas
In situ
Copyright © 2016 Judi Thomas
Growing in copious mycelium
Copyright © 2016 Judi Thomas
Abundant rhizomorphs attached to base of stipe
Copyright © 2016 Judi Thomas
KOH on cap

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Wow! That’s an incredible resource
By: Judi T. (AvidAmateur)
2016-05-14 08:10:58 -05 (-0500)

for me to have. Thanks so much for the PDF, Rocky. I’m grateful for your willingness to help me expand my knowledge of mushroom identification.

Thanks, Rocky. The stipe and annulus (especially)
By: Judi T. (AvidAmateur)
2016-05-13 21:17:48 -05 (-0500)

seemed very interesting to me. Have not seen anything like it before; it’s new to me. I recall where I saw it, so will take another look, hopefully can find some fresher specimens.

I will
By: Rocky Houghtby
2016-05-13 20:38:26 -05 (-0500)

Email you fan6 later tonight.

It is
By: Rocky Houghtby
2016-05-13 20:36:54 -05 (-0500)

Not a matter of correcting your terminology, the two physical characteristics likely result from the same mechanism during pileus development, but differ in the depth of the wrinkles, and involvement of pellis tissues.

The characteristics of this species that interest me are the stipe decorations, and upward orientation of the annulus. This one is definitely a keeper, if you come across it again.

Rocky, thanks for correcting my terminology.
By: Judi T. (AvidAmateur)
2016-05-13 20:23:34 -05 (-0500)

It looked crinkled or wrinkled to me for lack of a better word. Do not have the reference you cite.

I would not
By: Rocky Houghtby
2016-05-13 20:20:20 -05 (-0500)

Describe this pileus as being rivulose, or wrinkled, but rather as being radially aerolate. Based on the morphology, I would compare species like praecox, and acericola. I find the same species in Il, and have no idea what to call it. Do you have a copy of flora agaracina neerlandica 6?