Agaricus abruptibulbus

Agaricus abruptibulbus is a species of mushroom in the genus Agaricus.

In his 1904 Report of the State Botanist publication, he changed the name to Agaricus abruptibulbus.

Agaricus abruptibulbus belongs in the Arvenses clade of the genus Agaricus (along with species A. silvicola, A. arvensis, and A. semotus).

Agaricus abruptibulbus is known to bioaccumulate the toxic element cadmium-in other words, it absorbs cadmium faster than it loses it-so specimens collected in the wild often have higher concentrations of this element than the soil in which they are found.