Observation 171811: Agrocybe putaminum (Maire) Singer
When: 2014-05-30
Collection location: Sintra, Portugal [Click for map]
Who: zaca
No herbarium specimen

Notes: Dimensions of the spores:
(10.4) 11.4 – 13 (13.9) x (6.3) 6.4 – 7.6 (8.1) um
Q = (1.5) 1.6 – 1.9 (2) ; N = 24
Me = 12.1 × 7 um ; Qe = 1.7


Cheiloystidia (H2O)
Cheilocystidia (congo red)
Cheilocystidia (congo red)
Basidia and cystidia (congo red).
Dimensions of cystidia.
Dimensions of cystidia.
Dimensions of cystidia.
Dimensions of cystidia.

Proposed Names

22% (2)
Recognized by sight
45% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
I made as usual:
By: zaca
2014-07-30 17:05:01 PDT (-0700)

Detach a triangle, which is a sector centered at the center of the cap, and make a thin (as possible) section of it with the radial orientation.
Unfortunately, I cannot repeat, since I didn’t dry the mushroom.

By: Byrain
2014-07-30 16:49:27 PDT (-0700)

Are you sure that is the epicutis? Looks more like the layer below it, how did you make the section?

Yes, some are
By: zaca
2014-07-30 16:45:39 PDT (-0700)

basidioles. The structure of the pileipellis doesn´t seem to be as describe in FAN6 for A. putaminum.

By: Byrain
2014-07-30 16:35:35 PDT (-0700)

A lot of those cystidia are basidioles I think, if this has pileocystidia, I think we can rule out A. pediades and A. ochracea leaving A. putaminum and A. smithii, the spore size points to the former I think.

It seems that …
By: zaca
2014-07-30 16:25:27 PDT (-0700)

I got wrong dimensions (from http://en.wikipedia.org/wiki/Agrocybe_putaminum) for the spores of A. putaminum: 10–12 by 5–9 μm). Thanks to Byrain I could see a better reference with the values he indicated. I upload some photos with the measurements of some of the structures: Cheilocystidia, pleurocistidia ans pileicystidia. The forms seeming to be of A. putaminum, but the dimensions of pleurocystidia and of the pileicystidia are too small.
I didn´t record the taste of the mushroom.

More info?
By: Byrain
2014-07-30 15:00:32 PDT (-0700)

Taste? Cheilocystidia length? Pleurocystidia? Pileocystidia? Germ pore width?

A. putaminun spore size from FAN6 is “Spores 9.5–13.5(15.5) × 6.0–8.0(8.5) × 5.5–7.0 μm”
Seems good with yours, as does the stem texture.

Agrocybe putaminum:
By: zaca
2014-07-30 13:57:15 PDT (-0700)

The spores are a bit to large for this species, I think.

Created: 2014-07-30 13:35:21 PDT (-0700)
Last modified: 2014-07-30 16:35:47 PDT (-0700)
Viewed: 53 times, last viewed: 2016-10-21 09:17:57 PDT (-0700)
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