Originally described as the variety "Agaricus campestris" var. The cap is similar to that of "Agaricus campestris" (the field mushroom). This species was originally noted and named in 1753 by Carl Linnaeus as "Agaricus campestris". Synonyms include "Psalliota bernardii", "Pratella bernardii", "Fungus bernardii", and "Agaricus campestris" subsp. "bernardii". The type is "Agaricus campestris" (widely accepted, except by Earle, who proposed "A. cretaceus").