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Pleurotus ostreatus

Oyster mushroom

Description

It is common on dead standing and fallen trees. For the infection usually wood or bark injuries are needed. The fungus slowly spreads through the wood, and causes white rot. Fruiting bodies appear after a longer a wet period. The mushroom has a cap spanning 5-25 cm broad, fan or oyster-shaped. Natural specimens range from white to grey or tan to dark-brown, with inrolled margin when young, smooth and often somewhat lobed or wavy. Flesh is white, firm, varies in thickness due to the position of stripe. The gills of the mushroom are white to cream, descend stalk if present. If so, stipe is off-centre with lateral attachment to wood.

Symptom

The fungus slowly spreads through the wood, and causes white rot. The mushroom has a cap spanning 5-25 cm broad, fan or oyster-shaped.

Tree Species: Birch, Beech, Rowan, Whitebeam, Maple, Lime, Horse Chestnut, Poplar, Willow

Part of a plant- attacked: Tree trunk

Pest significance: Harmful

Pest Category: Fungi

Invasive Species: No

Present in EU: Yes

Last observations

There are a total of 10 observations of the species in the system

Pleurotus ostreatus Oyster mushroom
Eliška Dodoková
Number of votes: 0
Published: 6.1.2026

Pleurotus ostreatus Oyster mushroom
Viktor Javorský
Number of votes: 0
Published: 28.12.2025

Pleurotus ostreatus Oyster mushroom
Tamara Pavurová
Number of votes: 0
Published: 12.11.2025

Pleurotus ostreatus Oyster mushroom
Marián Slamka
Number of votes: 0
Published: 1.8.2025

Pleurotus ostreatus Oyster mushroom
Maťo
Number of votes: 0
Published: 6.1.2025