The correct answer is Agaricus bisporus.White button mushrooms are grown all over the world and account for 35-45 % of the total mushroom production.Agaricus bisporus is an edible basidiomycete mushroom native to grasslands in Europe and North America.It has two color states while immature ‚¬€œ white and brown ‚¬€œ both of which have various names, with additional names for the mature state. Button mushrooms can be eaten raw or cooked.Both the cap and the stem of a white button mushroom are edible. Before cooking, just trim off the very end of the stem.