Observation 128056: Agrocybe Fayod
When: 2012-04-19
No herbarium specimen

Notes: Light brown cracked cap with small umbo. attached white gills becoming darker with age. Portions of stipe curlimg upwards with age. spore print brown. found in wood chips. I would like to call this species I according to mushroom expert.com.

Proposed Names

0% (3)
Eye3
Used references: Audubon
60% (2)
Eyes3
Recognized by sight
6% (4)
Used references: Audubon
9% (4)
Used references: Mushroom expert .com
31% (3)
Recognized by sight: East coast species without an annulus, fruiting in spring, stipe with radial grooves at the apex

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Byrain
By: Phil (gunchky)
2013-05-23 20:25:19 CDT (-0500)

Tommorow will be microscope day. I have collected spores and numerous photos from my new collection and I will post all the information friday evening. If anyone is interested in this collection, please advise and I will mail them to said persons. These are intriging specimens and I want to know what they are.

Phil
By: Byrain
2013-05-22 10:54:03 CDT (-0500)

Do you have pictures of the new specimens? With pictures I can volunteer to look at them, but I can’t say I am as familiar with the genus yet as Rocky says, I just think Agrocybe is interesting and I like scoping them. :)

Dave, A. praecox & similar species will have a veil, species that do not have a veil are something else, but you are right that the veil can disappear with time/wear. So its best to judge the veil from multiple specimens, especially younger ones. In this case I think the stem looks more like its breaking apart then having any sort of veil.

Over the years I’ve got into the habit…
By: Dave W (Dave W)
2013-05-22 07:41:31 CDT (-0500)

of calling all of the fleshy early spring Agrocybes “praecox”… whether or not an annulus is observed. Looks like it’s time to split my concept.

But… I have seen examples of clusters of Agrocybe where some of the mushrooms showed evidence of a partial veil and others showed not even so much as a ring zone. Sometimes the veil tears away from stipe, does not adhere to the cap margin, and disappears.

That is
By: Rocky Houghtby
2013-05-21 21:05:49 CDT (-0500)

Byrain’s department, he is very familiar with the genus and an excellent microscopist. Thank you for the offer though! I think this is a very interesting observation and I’d dearly like to know what to call it.

Rocky
By: Phil (gunchky)
2013-05-21 21:01:46 CDT (-0500)

I have new material collected two days ago of the same species. If you like I will send some of them to you along with their spores. Phil

Material?
By: Rocky Houghtby
2013-05-21 20:40:15 CDT (-0500)

Do you have dried material besides the spores? Even if you don’t I’d be interested in seeing the spores alone, particularly measurements of the germ pore.

Agrocybe
By: Phil (gunchky)
2013-05-21 20:37:25 CDT (-0500)

Dave, do you remember the meeting in the spring of 2011 in which I presented Agrocybe praecox in various stages of developement and you discussed them at length from buttons to fully mature species. That was a nice collection, but, unfortunitaly I never photographed them. These mushrooms are quite different from those, and according to Kuo they are put in groups which I call ‘headbangers’. In any event, as soon as I can find some spare time I will photograph the spores at 400x and 1000x, and post them.

Even during a very warm and early spring…
By: Dave W (Dave W)
2013-05-20 22:13:48 CDT (-0500)

like 2012, a large fleshy Agrocybe that occurs in NE PA as early as April 19 is likely to be one of the A. praecox types.

Flora Agaricina Neerlandica vol 6
By: Byrain
2013-02-07 21:17:35 CST (-0600)

is a good place to start.

Byrain
By: Rocky Houghtby
2013-02-07 21:06:42 CST (-0600)

What literature would you recommend starting with for Agrocybe? Singer? Peck? There are a ton of species of Agrocybe-

http://www.cybertruffle.org.uk/...

I’ve never taken the time to dig in to the genus or any of it’s previous incarnations.

Come to think of it
By: Rocky Houghtby
2013-02-07 20:51:51 CST (-0600)

A. putnamium isn’t an east coast species either.

Yes.
By: Byrain
2013-02-07 20:50:01 CST (-0600)

The large amounts of caulocystidia that make up that stem texture visible in my picture. These stems look rather smooth outside of the cracking.

Eh?
By: Rocky Houghtby
2013-02-07 20:48:41 CST (-0600)

Besides being curled from a lack of moisture the stem texture looks fine for putnamium. Am I missing something?

Agrocybe putaminum
By: Byrain
2013-02-07 20:34:18 CST (-0600)

The stem texture looks off from A. putaminum, compare with – http://mushroomobserver.org/image/show_image/282569?obs=116752&q=12jSD

Created: 2013-02-07 19:46:51 CST (-0600)
Last modified: 2013-05-22 10:54:58 CDT (-0500)
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