White mushrooms
From Cookipedia
Agaricus bisporus—known variously as the common mushroom, button mushroom, white mushroom, table mushroom, Champignon mushroom, crimini mushroom, Swiss brown mushrooms, Roman brown mushrooms, Italian brown, Italian mushroom, cultivated mushroom, or when mature, the Portobello mushroom—is an edible basidiomycete mushroom native to grasslands in Europe and North America. Agaricus bisporus is cultivated in more than 70 countries and is one of the most commonly and widely consumed mushrooms in the world.
Storing mushrooms for long periods
Mushrooms do not keep well for long periods and are not suitable for freezing. A good way to store mushrooms in frozen form is to make duxelles from them and freeze that.