Agaricus arvensis or Agaricus xanthodermus?

                       Agaricus arvensis or Agaricus xanthodermus?

Observation - Agaricus arvensis or Agaricus xanthodermus? - UK and Ireland. Description: Large white Agaricus species growing on grassland beneath mixed woodland area, parkland. Gills pink and ring partly attached to margin.

Large white Agaricus species growing on grassland beneath mixed woodland area, parkland. Gills pink and ring partly attached to margin.