Little Brown Mushrooms
Into this catchall category go the hundreds of small or medium-sized mushrooms that are brown or tan and have the well-defined stalk and cap that define the traditional mushroom “shape.” Spore color, which is often used to identify mushrooms, varies in this group. Even experts can have a great deal of trouble sorting “little brown mushrooms” into species. Because many are poisonous, and some deadly, we recommend avoiding the whole bunch.

