Mushroom Observer
Catalog #: MUOB 3675
Taxon: Agaricus arvensis Schaeff.
Family: Agaricaceae
Collector: Rex   MUOB 3675   
Date: 2005-09-25
Verbatim Date: 2005-9-25
Locality: Canada, Ontario, Elgin
42.6731  -81.3112
Description: Original observation #3675 (Mushroom Observer)
Occurrence Remarks: Found growing in large arcs or fairy rings in grassy areas in my region, A. arvensis is commonly overlooked by the average person as being a "toadstool". One defining characteristic that I often use is the patchwork on the veil. Observing the underside, you will quickly notice the patches resembling a cog or gear. I enjoy collecting this mushroom as some of my friends who will not eat a chanterelle for instance will eat A. arvensis because they are already familiar with the cultivated A. bisporus. Older collectors do not differentiate between A. arvensis & A. campestris, referring to both species as "pink bottoms". The common name I use the "horse mushroom".
Specimen Images
Rights Holder: MO Observers
Record Id: 220b8e92-5d22-436e-9c21-0df2dfc9c8f8
For additional information on this occurrence, please contact: Nathan Wilson (
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