Phylum: Basidiomycota	Class: Agaricomycetes
Order: Agaricales	Family: Agaricaceae
Species: Agaricus arvensis Schaeff.

Synonyms:

Agaricus arvensis var. macrolepis Agaricus exquisitus Agaricus fissuratus Agaricus leucotrichus balgain-bhuachair balgan-buachair Caws Ceffyl Psalliota arvensis Psalliota arvensis f. epileata Psalliota arvensis f. obesa Psalliota arvensis var. albosquamosa Psalliota arvensis var. hortensis Psalliota fissurata Psalliota leucotricha

Common Name:

Horse Mushroom

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This distribution map was produced using DMap

Photographer: © David Mitchel

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View this species in its UK context on the NBN Atlas

Associated Species (where recorded) & number of records: Quercus (5) Corylus avellana (4) Fagus sylvatica (4) Pinus (2) Quercus petraea (2) Picea (1) Carex (1) Bos domestic (1) Betula pendula (1) Pinus sylvestris (1)

Habitat (where recorded) & number of records: Acid grassland (6) Parkland and scattered trees (4) Woodland (4) Neutral grassland: semi-improved (3) Parkland and scattered trees: mixed (3) Sand-dune: dune grassland (3) Woodland and scrub (3) Woodland: broadleaved, semi-natural (3) Acid grassland: semi-improved (2) Calcareous grassland (2) Improved grassland (2) Neutral grassland (2) Woodland: broadleaved, plantation (2) Woodland: mixed (2) Acid grassland: unimproved (1) Boundaries: intact hedge (1) Grassland and marsh (1) Neutral grassland: unimproved (1) Other artificial habitats (1) Sand-dune (1) Sand-dune: dune slack (1) Wet heath/acid grassland (1) Woodland: broadleaved (1) Woodland: coniferous, plantation (1) Woodland: mixed, semi-natural (1)

Substrate (where recorded) & number of records: Soil Grassy (27) Soil (20) Soil Mossy (3) Soil Needle (2) Dung (1)

Months recorded in & number of records: January (8) March (5) April (1) July (7) August (13) September (18) October (35) November (12)