Agaricus bisporus - online puzzles

Agaricus bisporus is an edible basidiomycete mushroom native to grasslands in Europe 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.

A. bisporus is cultivated in more than seventy countries, and is one of the most commonly and widely consumed mushrooms in the world.

Names

When immature and white, this mushroom may be known as common mushroom, white mushroom, button mushroom, cultivated mushroom, table mushroom, and champignon mushroom. When immature and brown, it may be known variously as Swiss brown mushroom, Roman brown mushroom, Italian brown mushroom, cremini/crimini mushroom, chestnut mushroom, and baby bella.When marketed in its mature state, the mushroom is brown with a cap measuring 4–6 inches (10–15 cm). This form is commonly sold under the names portobello mushroom, portabella mushroom, and portobella mushroom, but the etymology is disputed.

Taxonomy

The common mushroom has a complicated taxonomic history. It was first described by English botanist Mordecai Cubitt Cooke in his 1871 Handbook of British Fungi, as a variety (var. hortensis) of Agaricus campestris. Danish mycologist Jakob Emanuel Lange later reviewed a cultivar specimen, and dubbed it Psalliota hortensis var.