Agaricus Bisporus mushrooms cover photo - 177767443

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A. bisporus is cultivated in more than seventy countries, and is one of the most commonly and widely consumed mushrooms in the world. The pileus or cap of the original wild species is a pale grey-brown in color, with broad, flat scales on a paler background and fading toward the margins. The narrow, crowded gills are free and initially, pink, then red-brown and finally a dark brown with a whitish edge . The firm flesh is white, although stains a pale pinkish-red on bruising. The spore print is dark brown. This mushroom is commonly found worldwide in fields and grassy areas following rain, from late spring through to autumn, especially in association with manure. In many parts of the world it is widely collected and eaten; however, resemblance to deadly or poisonous lookalikes should be noted. Modern commercial varieties of the common agaricus mushroom originally were light brown in color. The white mushroom was discovered in 1925 growing among a bed of brown mushroom. As with the reception of white bread, it was seen as a more attractive food item and became grown and distributed. Similar to the commercial development history of the navel orange and Red Delicious apple, cultures were grown from the mutant individuals, and most of the cream-colored store mushrooms marketed today are products of this 1925 chance natural mutation. A. bisporus is now cultivated in at least seventy countries throughout the world.