Straw mushrooms, named for the beds of straw on which they grow in China, are small, plump brown mushrooms that resemble closed umbrellas and have a mild flavor and a tender texture. Also known as umbrella mushrooms, they are most often sold canned and should be rinsed before using.
For other mushroom varieties, see button, chanterelle, Chinese black, cremini, cultivated, oyster, porcini, portobello, shiitake, and tree ear mushrooms, and truffles.