Quite a variable mushroom, the cap white or sometimes creamy yellow, and remaining in the button stage for quite a long period. The gills are deep pink, finally darkening to brown. The cap can grow up to 10cm across, and the stem up to 10cm tall.
It can be seen late summer to autumn. A familiar mushroom of pastures, particularly those grazed by cattle. Found clustered, sometimes massed, in grassland of all types. Widespread and fairly common.
Photograph of Field Mushroom (Agaricus campestris), taken September 2016, local field, Staffordshire. © Pete Hillman 2016. Camera used Nikon D7200, with Sigma 105mm macro lens.