Observation 296333: Agrocybe sensu lato

When: 2017-10-28

Collection location: Ricketts Glen State Park, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

Specimen available

Stipe with hollow central chamber.

In mix of soil, humus, and wood chips recently spread along the border of a landscaped area.

Spores (from spore drop) ~8-9.5 × 4.5-5.5, ellipsoid but truncate. In smash mount of gill material found what I believe are swollen-clavate cystidia that darkened noticeably in Congo red, as well as slightly mucronate cystidia that did not darken noticeably in Congo red (several examples of each).

Spore print dark brown.


Note darkened cystidium.
Note mucronate cystidium.

Proposed Names

87% (1)
Recognized by sight
58% (2)
Recognized by sight
29% (1)
Recognized by sight

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= Observer’s choice
= Current consensus


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Created: 2017-10-29 22:30:39 CDT (-0500)
Last modified: 2017-12-09 18:44:23 CST (-0600)
Viewed: 27 times, last viewed: 2019-09-03 16:06:48 CDT (-0500)
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