Agaricus bisporus, Allen Banks & Staward Gorge, Northumberland
Agaricus bisporus, commonly known as the cultivated mushroom, is a basidiomycete mushroom native to grasslands in Eurasia and North America. It has two color states while immature – white and brown – both of which have various names, with additional names for the mature state, including portobello.
A. bisporus is cultivated in more than 70 countries, and is one of the most commonly and widely consumed mushrooms in the world. It has some deadly poisonous lookalikes in the wild.