portobello/portobella/portabella mushrooms

Portobello, portobella or portabella mushrooms are the mature (brown) form of Agaricus bisporus, an edible mushroom native to grasslands in Europe and North America.

When immature and white, this mushroom may be known as common mushroom, white mushroom, button mushroom, cultivated mushroom, table mushroom, and champignon mushroom (or simply champignon).

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 sold in its mature state, the mushroom is brown with a cap measuring 10–15 centimetres (4–6 inches). This form is commonly sold under the names portobello mushroom, portabella mushroom, and portobella mushroom

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