MushroomsCaution

Oyster mushroom

Pleurotus ostreatus / P. pulmonarius

Shelf-like, gray-tan mushrooms with gills running down to the wood. Must be separated from a few look-alikes.

Oyster mushroom: Whole plant — Whole plantPhoto: John S Harper · CC0 · source

Oyster mushroom: Underside — UndersidePhoto: Jeff · CC BY · source

Oyster mushroom: Habitat — HabitatPhoto: Matt Berger · CC BY · source

Oyster mushroom: Look-alike side by side. Angel wings (Pleurocybella porrigens), a toxic look-alike — Look-alike side by sideAngel wings (Pleurocybella porrigens), a toxic look-alikePhoto: Sigrid Jakob · CC0 · source

Confirm EVERY point before you eat it

Shelf or oyster-shaped caps, 2-8 in, gray, tan or white, smooth with a curled edge
White to cream gills running down (decurrent) onto a short off-center stem or none
Spore print white to lilac-gray
Firm white flesh with a mild, sweet or anise-like scent; grows in overlapping clusters on wood

0 of 4 confirmed. If any point does not match, it is not this plant.

Look-alikes to rule out

Jack-o'-lanternToxic
Orange, blade-like gills, tight clusters, flesh orange throughout.
See the card →
Angel wingsToxic
Thin, white, grows on conifer wood; linked to serious poisoning. Avoid.
Bitter oysterHarmless
Small, tan, tough and very bitter; not food.

Warnings

Cook thoroughly and try a small portion first.

In season

Cool, damp weather; fall to early winter and again in spring.

Habitat

Dead or dying hardwood such as beech, maple, poplar.

Parts used

caps

Preparation and use

Saute, roast or add to soups.

Harvest note

Leave old or bug-riddled clusters.

Field traits

Grows on: dead hardwood
Underside: decurrent gills
Spore print: white to lilac-gray

Backpack Guide: Oyster Mushroom — Positive ID →

Educational reference only. Never eat a wild plant or mushroom based on a website or app. Confirm with an experienced forager, your local extension office, or a mycological club. Poison Control (US): 1-800-222-1222. Call 911 for severe symptoms.