Pleurotus ostreatus, also known as the Oyster mushroom, is a medium to large fungus which is named for its shape rater its taste. It is sometimes found in great quantity and may be dried and stored for later use. It is easily cultivated and grown commercially almost all over the world.
Convex with an incurved margin at first, expanding to a fan-shaped with a flat or shallowly depressed disc and inner limb. Gills
are crowded, white to cream, and descend on the stalk if present. Stem
off-center with a lateral attachment to wood.
Omphalotus nidiformis is a toxic lookalike found in Australia and Japan. In North America, Omphalotus olivascens, the western jack-o'-lantern mushroom and Clitocybe dealbata, the ivory funnel mushroom, both can be mistaken for Pleurotus ostreatus.
on the www.first-nature.com web site.