Observation 45572: Agrocybe praecox (Pers.) Fayod
When: 2010-05-17
Herbarium specimen reported

Notes: Found and id’ed by others at the SMG meeting.

Looked at the under the scope, to get some info from a European collection for comparison. Of course this is soo variable, who knows if this will matter much.

The first micro-shot is of the cap surface at 400x in Meltzer’s. The cap surface here can be seem to be cellular, so it is a hymeniform, not a cutis. There was no gelatin seen, or pileocystidia.

The second micro-shot is of a gill edge at 400x in Meltzer’s. Here cheilocystidia can be easily seen, well spaced on a fertile edge. Also pleurocystidia were obs., as equally common and well spaced, and similar shaped. The shape is lageniform with blunt apex.

The third micro-shot is of spores from the stipe apex at 1000x in KOH. The spores are ellipsoid, smooth, tan, truncate with a clear germ pore. They are almost like Psilocybe spores, but less pigmented. An ave. size on 7 spores is 7.9 × 5.2 um.

Not sure I will keep looking at Agrocybes, but here is some info from a European collection. Mostly for Ron to use in comparison with his studies of Californian Agrocybes.

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Comments

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How exciting! Another Agrocybe praecox…maybe?
By: Ron Pastorino (Ronpast)
2010-05-22 00:01:47 CDT (-0400)

I’ll put it on my priority list…somewhere around # 896.

that is one slender praecox!
By: Debbie Viess (amanitarita)
2010-05-21 11:51:55 CDT (-0400)

OK Ron, the ball is in your court…;)

Created: 2010-05-18 12:36:53 CDT (-0400)
Last modified: 2010-05-21 07:02:18 CDT (-0400)
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