Various species of Crepidotus
, and Panellus
are similar in appearance but are inedible or of unknown edibility. They differ most obviously in that they are relatively small (under 6 cm broad) and not generally as white. The edible Pleurotus populinus
differs in that the cap is whitish but not ivory white, the flesh is thicker, and it fruits in the spring on aspens and cottonwoods.