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Tinder fungus

Fomes fomentarius (L.) Fr. · Polyporaceae

Also: False tinder fungus, Hoof fungus, Tinder conk

Inedible

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Identification in 5 steps

The tinder fungus is a perennial, hoof-shaped bracket fungus on beeches and birches. It was once used to make tinder for lighting fires.

Seasonyear-round
Spore printwhite to yellowish
FamilyPolyporaceae
  1. Cap. The fruiting body is hoof-shaped, 10 to 40 cm wide, with a grey to grey-brown, hard crust and concentric growth zones.
  2. Underside. The pores are small, round and grey-brown.
  3. Stem, ring and volva. There is no stem; the fungus is attached broadly to the trunk.
  4. Smell and taste. It smells slightly sour.
  5. Flesh and colour change. The inside is cinnamon brown, fibrous and softly felty, and can be pressed in; the crust is hard.

Lookalikes

Woody and hard; not an edible mushroom.

Habitat & Season

Living, weakened or dead wood. From the lowlands to the hills and mountains.

Host trees

Common beech and birch, less often other broadleaved trees.

Season

possible good main season

Visible all year round; perennial.

Mushroom regions with a daily forecast

There are no records per region for this species yet. The country pages lead to all regions with a daily forecast.

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Safety

Never eat a mushroom you have not identified with certainty. Not an edible mushroom: do not collect it for the kitchen.

Advice for your country

United Kingdom

Poison centre:

NHS 111 (England)111

Emergency: 999 · 112

Ireland

Poison centre:

National Poisons Information Centre (public line)(01) 809 2166

Emergency: 112 · 999

Germany

Poison centre:

Giftnotruf Berlin030 19240Giftinformationszentrum München089 19240GIZ-Nord Göttingen0551 19240

Emergency: 112

Mushroom advice: DGfM: find a mushroom expert. Certified mushroom experts of the German Mycological Society (DGfM).

Collecting rules: Mushrooms that are not specially protected may be collected in small quantities for personal use unless a protected area or ban applies. Certain specially protected edible species (e.g. cep, chanterelle, birch bolete) may be collected in small quantities for personal use.

Austria

Poison centre:

Vergiftungsinformationszentrale (VIZ)01 406 43 43

Emergency: 112 · 144

Mushroom advice: Austrian Mycological Society (ÖMG): mushroom advice. Mushroom advice by the Austrian Mycological Society or regional services such as municipal market offices.

Collecting rules: At most 2 kg of mushrooms per person per day unless the forest owner has prohibited collecting; organised collecting events are prohibited. Additional state rules apply (collecting hours, closed seasons), e.g. Carinthia, Tyrol, Vorarlberg, Salzburg.

Conservation and collecting rules

Not specially protected.

Salzburg: collecting inedible mushrooms is banned.

Red List Germany: Least concern

Why it is not edible

Woody and indigestible.

It is traditionally used as tinder and craft material.

Frequently asked questions

Tinder fungus: Is it edible?

No, it is regarded as inedible. Woody and hard; not an edible mushroom.

Tinder fungus: When and where does it grow?

It can be found all year round. Visible all year round; perennial. Partner and habitat: common beech and birch, less often other broadleaved trees. Soil: living, weakened or dead wood. Altitude: from the lowlands to the hills and mountains.

Tinder fungus: What are its lookalikes?

The most important one to rule out is the red-belted conk (Fomitopsis pinicola, inedible): it usually has a reddish margin band, paler flesh and often grows on conifer wood. Other lookalikes: willow bracket, Ganoderma species.

Related species

Open the mushroom map Mushroom trainer: test yourself

Sources

Photo credits

No substitute for having your finds checked in person. No guarantee of accuracy. Updated: 17.10.2026.

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