Edible, therapeutic and toxic mushrooms
10,1
OYSTER MUSHROOM
Pleurotus ostreatus
Frequency
Frequent
Habitat
On many hardwoods, from May to November, fruiting the cool days of the begenning and the end of the summer, while the Summer Oyster fruits during the hot days of July and August.
Cap
White caps, sometimes pale gray.
Margin
Inrolled at first, spread out later, thin.
Gills
White, crowdy, decurrent and of various lengths.
Stalk
Lateral to off center, more or less short, sometimes centered when it fruit on top of a trunk lying on the ground, rarely absent.
Flesh
White, thin in the cap, thicker at the base.
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In the field, it is difficult to differentiate between Oyster Mushroom and Summer Oyster, since the seasons overlap and the fruiting bodies are often similar. Microscopic criteria will confirm their identification.
The stipe of Oyster Mushroom and Summer Oyster are lateral or off-center, or sometimes central if they fruit on the top of a trunk on the ground. The same is true for the Aspen Oyster.
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