A number of inedible species of Crepidotus
can be superficially similar. They differ in that they are smaller (under 5 cm broad) and have a brown spore deposit. The common name "oyster mushroom" can refer to either Pleurotus ostreatus
or Pleurotus populinus
, both of which are edible. The latter differs from the former in that it is smaller (under 9 cm broad), grows on aspens
, and has a spore print that is white rather than lilac/grey.