Observation 175381: Agrocybe sensu lato

When: 2014-08-25

Collection location: Hunlock Creek, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

Plenty of cheilo- and pleurocystidia, some clavate, some with long straight tapered necks, some with long slightly crooked necks.

On a mossy area of a lawn under maple and White Pine.

Proposed Names

-29% (1)
Recognized by sight
62% (3)
Recognized by sight
84% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Actually Rocky, what you suggest…
By: Dave W (Dave W)
2014-08-26 21:07:39 MDT (-0600)

is easier than getting a useful Roman aqueduct section. I usually try to work with a piece of a single gill, like you explain.

Thanks for the info.

By: Rocky Houghtby
2014-08-26 19:58:29 MDT (-0600)

That sort of section is generally useful for discerning trama and pellis types, but not much else. I recommend you remove a single lamella with forceps while noting the position of the gill edge, place the specimen on the slide and using a new razor, seperate the sterile edge from the lamella and place the edge-less lamella on another slide. You now have two slides, one that exclusively contains fertile hymenium and one that includes Cheilocystidia. You can further section your prepared slides in order to minimize tissue and make use of your oil objective more practical.

I do not think that this observation will merit an epithet without significant microscopic evidence. Perhaps Byrain can provide some suggestions. This is an interesting one.

I attempted a Roman aqueduct section.
By: Dave W (Dave W)
2014-08-26 18:49:17 MDT (-0600)

Not a very clean mount; stuff kinda ran together. But I was seeing cystidia in lots of places.

Agrocybe was my second thought. I think the habitat may be somewhat dubious for Pholiotina. The combination of small stature and well-formed annulus reminded me of Pholiotina.

Maybe Agrocybe erebia? I have seen this (or something very close) on lawns. Cap looks different than A. erebia, though.

By: Rocky Houghtby
2014-08-26 12:27:58 MDT (-0600)

do not have pleurocystidia. Are you sure you weren’t looking at cheilocystidia exclusively?

Created: 2014-08-26 08:58:31 MDT (-0600)
Last modified: 2016-09-11 11:57:33 MDT (-0600)
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