True Tinder Polypore

(Fomes fomentarius)

Conservation Status

IUCN Red List

not yet assessed

True Tinder Polypore


not listed


not listed


Very common and widespread


Year-round but grows mostly in early summer and autumn


Usually birch, but also other hardwoods


The fruiting body (conk) is a 2 to 8 wide, ¾ to 4¾ thick polypore. It is hoof-shaped, rounded and curved downward on top, flat or slightly angled upward below. There is no stalk.

The upper surface is concentrically zoned and hairy when young. The zones are grooved and vary in color in shades of gray and brownish-gray. It soon becomes gray and hairless. The margin is whitish and velvety on actively growing conks.

The underside is whitish. The pore tubes are not layered (stratified).

The flesh is hard and cinnamon brown. When cut in cross section there are no white lines (mycelial threads) visible.

An individual conk can survive for years, even decades, forming a new ridge or furrow each year. It is found on standing or fallen dead trees or on the trunk of a living tree.


False Tinder Fungus (Phellinus igniarius) old conks are black and often cracked above. The margin and undersurface are light brown and velvety on actively growing conks. The pores are stratified. The flesh in cross section shows white mycelial threads.

Distribution Distribution Map  

Sources: 4, 7, 24, 26, 29, 30, 77.


White Trunk Rot
This fungus causes white trunk rot on hardwood trees. It turns the wood into a soft, white, spongy mass.

Otzi the Iceman
True Tinder Polypore gets its name from its most common usage, as tinder for starting fires. Otzi the Iceman, the 5,000-year-old mummy found in the Alps in 1991, was carrying four pieces of it.



Basidiomycota (club fungi)



Agaricomycotina (jelly fungi, yeasts, and mushrooms)



Agaricomycetes (mushroom-forming fungi)


No Rank:

Agaricomycetes incertae sedis






Polyporaceae (bracket fungi)




False Tinder Fungus

Hoof Fungus

Tinder Conk


Tinder Fungus

Tinder Polypore

True Tinder Polypore








A shelf-like, bracket-shaped fruiting body of certain fungi.



The vegetative part of a fungus; consisting of a mass of branching, thread-like hyphae, through which a fungus absorbs nutrients from its environment; and excluding the fruiting, reproductive structure.



A bracket fungi. A fungi that produces its spores in pores on the underside of a woody fruiting body (conk).

Visitor Photos
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Found on birch snag

  True Tinder Polypore   True Tinder Polypore
Robert Briggs
  True Tinder Polypore    Photos
  True Tinder Polypore   True Tinder Polypore



  Hoof Tinder Bracket Fungus
Andree Reno Sanborn
  Hoof Tinder Bracket Fungus  

Bracket fungus.

Hoof Tinder Fungus

Fomes fomentarius

  Fomes fomentarius - fungi kingdom
Fungi Kingdom

Published on Jan 23, 2015

Fomes fomentarius - fungi kingdom




Visitor Videos
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Other Videos
  Tinder Fungi (Fomes fomentarius) on Birch Tree
Carl Barrentine

Published on Jun 3, 2012

Photographed at the Rydell NWR, Minnesota (03 June 2012).

  Fomes fomentarius Tonderzwam
Michael Inden

Uploaded on Jul 11, 2009

Tonderzwammen op beuk

  Firestarter Mushroom - Fomes fomentarius

Uploaded on Feb 24, 2009

There is proof that prehistoric peoples used this mushroom to start fire with, and carry fire in. Tradd discuss this mushroom in the Pisgah national Forest.

  Fomes fomentarius (Ίσκα)
Kostas Tzouratzoglou

Published on May 16, 2015

  Iasca comuna, Fomes fomentarius, copita calului, de ajutor in stuparit
Adrian Manolache

Published on Nov 22, 2013

In clipurile mele despre ciuperci veti intalni cateva sute de specii de ciuperci si bureti. Unele ciupercisunt comestibile, altele necomestibile, toxice, halucinogene sau mortale. Foarte multe clipuri infatiseaza ciuperci medicinale, in special, imunomodulatoare, anticancerigene, antioxidante etc. O parte dintre clipuri prezinta si ciuperci cu o descriere completa, necesara pentru identificare si utilizare. Atentie! Exista si ciuperci de padure a caror identificare este nesigura sau doar in lucru. Pentru orice fel de informatie, va rog sa lasati mesaj.

Google Translate: My Videos about mushrooms you will find hundreds of species of fungi and sponges. Some edible ciupercisunt other inedible, toxic, hallucinogenic or fatal. Many videos depict medicinal mushrooms, in particular, immunomodulatory, anticancer, antioxidant etc. Some of the clips shows and fungi with a complete description, required to identify and use. Please note! There are wild mushrooms whose identification is insecure or just working. For any information, please leave message.




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Location: Cass County

Found on birch snag

True Tinder Polypore

Robert Briggs

Location: Afton State Park, Southern River Trail

True Tinder Polypore





Created: 10/26/2016

Last Updated:

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