Observation 160903: Agaricus L.

When: 2014-03-07

Collection location: Sydenham, Johannesburg, South Africa [Click for map]

Who: kerrya

No specimen available

I thought this might be agaricus campestris, but the colour striations and lack of spots have me wondering. They were growing in a clump on a grass verge, above an ants’ nest (not termites); we have recently had a lot of heavy rain. Across the road is a park with various species of tree, including pin oaks and pines.

The caps range up to about 12cm across. They are smooth to the touch, and the striations look almost as if they were a very fine skin that has split, revealing white underneath. The gills are a dark, chocolate brown. The smaller mushrooms had almost conical caps, and creamy-coloured gills, which is another reason I’m doubtful of the campestris identification. One young mushroom had a white membrane that covered it entirely, from cap to base, which came loose when I picked it.

It resembles the illustration on p60 of the Levin et al field guide, which identifies it as agaricus sp, “probably a form of agaricus campestris”.

It shows no evidence of staining or bruising of any kind. Mild flavour.


top view of caps
pattern and colour variations on caps
cap shapes and sizes
ring and gills

Proposed Names

52% (1)
Eye3 Eyes3
Recognized by sight
Used references: Sasol first field guide to mushrooms of southern africa (Branch);
A field guide to the mushrooms of south africa (Levin, Branch et al)

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2014-03-08 06:36:44 CST (-0600)
Last modified: 2014-03-08 06:36:51 CST (-0600)
Viewed: 13 times, last viewed: 2017-06-18 00:30:26 CDT (-0500)
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