Portobello Mushroom

It has two color states while immature white and brown both of which have various names.

When mature, it is known as Portobello mushroom, often shortened to just Portobello.

Immature and white, this mushroom may be known as common mushroom, button mushroom, white mushroom, cultivated mushroom, table mushroom, and champignon mushroom.

Immature and brown, this mushroom may be known variously as Swiss brown mushroom, Roman brown mushroom, Italian brown, Italian mushroom, cremini or crimini mushroom, baby bella, brown cap mushroom, or chestnut mushroom