Edible part of mushroom is

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The cap and the stalk together constitute the fruiting body called the basidiocarp or sporocarp. Because of the presence of characteristic gills the members of Agaricaceae family are generally called the gill or gilled fungi. They are generally fleshy and are also known as fleshy fungi. Some of these gilled or fleshy fungi are edible, ordinarily the edible fleshy (or filled) fungi are called the mushrooms.