Native to grasslands in Europe and North America. “Agaricus bisporus” (the common mushroom) is cultivated in more than 70 countries and is one of the most commonly and widely consumed mushrooms in the world. It was first described by English botanist Mordecai Cubitt Cooke in his 1871 Handbook of British Fungi.
Among English speakers, it is known by many names. A young specimen with a closed cap and either pale white or light brown flesh is known as a button mushroom or white mushroom.
In strains with darker flesh, the immature mushroom is variously marketed as a crimini mushroom, baby portobello, baby bella, mini bella, portabellini, Roman mushroom, Italian mushroom, or brown mushroom. At this stage of maturation, the cap may also begin to open slightly.
In maturity, it is called a portobello. The French name is champignon de Paris (“Paris mushroom”). – Wikipedia
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