Agaricus arvensis Schaeff.
(Horse Mushroom)

Taxonomic hierarchy:
SpeciesAgaricus arvensis (Horse Mushroom)
GenusAgaricus (true mushrooms)
FamilyAGARICACEAE (mushrooms, dapperlings and parasols, puffballs and bird’s-nests)
OrderAGARICALES (mushrooms and toadstools)
SubclassAGARICOMYCETIDAE (a subclass of basidiomycetes)
ClassAGARICOMYCETES (a class of fungi)
SubphylumAGARICOMYCOTINA (a subphylum of fungi)
PhylumBASIDIOMYCOTA (spore droppers, basidiomycetes)
KingdomFUNGI (true fungi)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
Records of Agaricus arvensis (Horse Mushroom) :
1: Agaricus arvensis (Horse Mushroom)
4 May 2012 OSGR: SY58 50° 40’ N, 2° 40’ W Vice County: Dorset (VC 9) England
group of c. 12 of white toadstools, in grass
Image 1: Cluster - in situImage 2: ColonyImage 3: Fruitbody - mature - lain down to show stipe and gillsImage 4: Fruitbody - mature - LSImage 5: Fruitbody - young - lain down to show underside of intact ringImage 6: Fruitbody - young - LSImage 7: Gills and upper stipeImage 8: Cheilocystidia - magnifiedImage 9: Spores - magnifiedImage 10: Spores - highly magnified
2: Agaricus arvensis (Horse Mushroom)
17 Oct 2004 OSGR: TF40 52° 40’ N, 0° 10’ E Vice County: Cambs (VC 29) England
on ground in Apple orchard
Image 1: Gills - young - close-upImage 2: Oblique view - young caps - in situImage 3: Ring and gills - close-upImage 4: Ring - underside - close-upImage 5: Side view - young cap - lain downImage 6: Side view - young caps - in situImage 7: Top view - in situImage 8: Gill edge - magnifiedImage 9: Gill edge - magnified (2)Image 10: Spores - magnifiedImage 11: Spores - magnified (2)Image 12: Spores - highly magnified
3: Agaricus arvensis (Horse Mushroom)
24 Aug 2004 OSGR: TF40 52° 40’ N, 0° 10’ E Vice County: Cambs (VC 29) England
on ground in Apple orchard
Image 1: Cap - mature - in situImage 2: Cap - mature - in situ (2)Image 3: Fruitbody - LSImage 4: Fruitbody - mature - in situImage 5: Fruitbody - young - in situImage 6: Fruitbody - young - upturnedImage 7: Fruitbody - young - upturned (2)Image 8: Gills - close-upImage 9: Ring - underside - close-upImage 10: Gill edge - microscope low magnificationImage 11: Spore on gill surface - microscope low magnificationImage 12: Spores - magnifiedImage 13: Spores - highly magnified
4: Agaricus arvensis (Horse Mushroom) IDENTIFICATION UNCERTAIN
29 Oct 1977 OSGR: SU73 51° 0’ N, 0° 50’ W Vice County: North Hants (VC 12) England
Image 1: Cap - oblique view - close-up - in situImage 2: Fruitbody - side view - close-up - in situImage 3: Fruitbody - turned over to show ring and stipeImage 4: Fruitbody - turned over to show stipe

Agaricus arvensis (Horse Mushroom) may be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Agaricus arvensis (Horse Mushroom)
BioInfoBioInfo (www.bioinfo.org.uk) has 2 host/parasite/foodplant and/or other relationships for Agaricus arvensis (Horse Mushroom)
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