Observation 212823: Agaricus arvensis Schaeff.
When: 2015-08-14
Who: xlasairian
No herbarium specimen

Notes: I believe this is an example of a horse mushroom, or agaricus arvensis, found on a roadside verge, accompanied by one other, under lime trees in the East Midlands, UK. Very happy to hear of any suggestions to the contrary, however.

The specimen has a pleasant, aniseed scent, and a dark brown spore print.

The cap is 15.5cm in diameter, is slight gradation to dark cream towards the centre. The gills were pink upon discovery, but over the last few hours seem to be darkening towards brown. There is a floppy skirt along the stem, which suggests the typical ‘cog wheel’ patterning of agaricus arvensis – this is a slightly discoloured, caramel-y colour in places on the underside. The specimen is 13cm tall.

There was no discernable discoloration upon bruising and slightly cutting the cap with a nail, neither has the specimen shown discoloration upon bisection. I’ve nibbled a bit and the taste was fresh and pleasant. Will be cooking up the rest this evening.

Images

546796
Full size, note ‘cog wheel’ skirting.
546801
Spore print, dark brown.
546803
Spore print, dark brown, detail.
546804
Bisection. No discoloration upon cutting, nor at the base of the stem.
546809
Cap detail, note darker coloration towards the centre. Cap did not stain yellow upon cutting.
546810
Gills, pink in appearance, later darkening towards brown.
546811
Gills, detail – pink in appearance.

Proposed Names

77% (1)
Eye3 Eyes3
Used references: R Phillips; J Wright; S Evans and G Kibbey

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2015-08-14 09:27:06 HST (-1000)
Last modified: 2015-08-14 09:32:49 HST (-1000)
Viewed: 10 times, last viewed: 2015-08-15 00:35:29 HST (-1000)
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