Observation 19190: Agaricus L.

I am left wondering what this is found in a Lowland podocarp forest so is unlikely to be a mycorrhizal. Unfortunately its a bit immature but even so it has brown smooth spores. It is some 70 mm high by 40 mm wide. Can any one suggest a genus as I am left not knowing were to look. I tried keying it out with some generic keys for brown spore fungi and ended up with Pholiotina which I dont think is right as these all seam to be small brown fungi.

I returned two days later and photographed the remaining fungi now a little over mature but this still leaves me puzzled as to what it could be.


The gill edge seamed to be sterile but with a line of darker pigmented cells along the gill edge.

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Agaricus arvensis
By: Clive Shirley (myxo)
2009-03-11 00:33:16 MDT (-0600)

Thanks Dimitar and Christian,

I believe you are right with it been Agaricus arvensis I have not seen a pale yellow verity before with the bush been a strange habitat for them. Its did have a odd smell which I did not recognize and bruised yellow then brown now that I think about it. The spores are also the right size and shape.

Thanks for your help

Very arvensis like…
By: Dimitar Bojantchev (dimitar)
2009-03-10 15:15:48 MDT (-0600)

Not sure whether arvensis is an appropriate name Down Under, but
what I see here is really arvensis like. It should have a rather
weak pleasant, slightly almondish odor, not always easy to
detect. But never unpleasant.

D. www.mushroomhobby.com
By: Christian (Christian Schwarz)
2009-03-10 11:41:02 MDT (-0600)

Did you notice any smell or staining reactions when handled? Great first photo, by the way.