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Oyster mushroom

Pleurotus ostreatus


Pleurotus ostreatus has a broad, fan or oyster-shaped cap spanning 5 – 25 cm. Natural specimens range from white to gray or tan to dark-brown. The margin is inrolled when young, and is smooth and often somewhat lobed or wavy. The flesh is white, firm, and varies in thickness due to stipe arrangement. The gills of the mushroom are white to cream, and descend on the stalk if present. If so, the stipe is off-center with a lateral attachment to wood. The spore print of the mushroom is white to lilac-gray, and best viewed on dark background. The mushroom's stipe is often absent. When present, it is short and thick.


Oyster mushrooms are sometimes weakly parasitic but more often saprobic and found on dying or dead standing deciduous broadleaf trees, particularly beech and oaks and sometimes on fallen trunks and large branches.


Spotted on a beech tree (Fagus sylvatica) near Frieswijk, Holland. (sources:see reference)

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Jae 6 months ago

Thanks Mark. As beautiful to look at as they are delicious.

Mark Ridgway
Mark Ridgway 6 months ago

Fabulous specimens.

Jae a year ago

Thank you, Leuba. There were a lot of clusters of these beauties on this particular tree. All that was missing were the fairies :)

Leuba Ridgway
Leuba Ridgway a year ago

What a healthy, lovely bunch! I love your fourth pic.

Spotted by

Overijssel, Netherlands

Spotted on Sep 26, 2020
Submitted on Sep 26, 2020

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