Brown mushroom is a general description that may apply number of wild and cultivated mushrooms, and may refer specifically to: Little brown mushroom, any of a large number of small, dull-coloured agaric species of interest to mushroom hunters Agaricus bisporus, common cultivated mushroom known by many names including "brown mushroom" Pleurotus eryngii, known as the king brown mushroom among other common names 🍄‍🟫, Brown Mushroom emoji, often used to represent edible mushrooms