Tinder Fungus

Fomes fomentarius

Also known as: Horse's Hoof Fungus, Ice Man Fungus

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Edibility inedible
Phylum Basidiomycota
Family Polyporaceae
Conservation Least Concern; widespread in northern forests

Complete Taxonomy

Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Polyporales
Family: Polyporaceae
Genus: Fomes
Species: F. fomentarius

Description

Fomes fomentarius is a hoof-shaped bracket fungus that grows on dead and dying hardwood trees. It has been used by humans for thousands of years as tinder for starting fires, as evidenced by its presence in Ötzi the Iceman's equipment from 5,300 years ago. The fungus was also processed into amadou, a felt-like material used for various purposes from fly fishing to traditional medicine. It causes white rot in trees.

Physical Characteristics

Cap Shape: Hoof or bracket-shaped, perennial
Cap Color: Gray to brown upper surface with hard crust; 5-40 cm wide, 3-20 cm thick
Size: 5-40 cm wide, 3-20 cm thick
Gill Attachment: No gills; tiny gray-brown pores on underside
Spore Print: White
Stipe: No stipe; brackets attached directly to tree
Habitat: Saprotroph and weak parasite on hardwoods, especially birch and beech
Fruiting Season: Perennial; adds new layer annually

Distribution

Northern Hemisphere in temperate regions

Habitat

Grows on dead and dying hardwood trees, particularly birch, beech, oak, and maple. Causes white rot, decomposing lignin.

Ecological Role

Important decomposer of hardwood, causing white rot. Creates cavities used by birds and insects. Long-lived brackets persist for years on dead trees.

Medicinal & Nutritional Properties

  • Traditional use for stopping bleeding (styptic)
  • Anti-inflammatory compounds
  • Antibacterial properties
  • Used in traditional Chinese and European medicine
  • May have anti-tumor properties (ongoing research)
  • Historically used in dentistry as absorbent material

Cultural Significance

Found with Ötzi the Iceman (5,300 years old). Processed into amadou (touchwood) for fire-starting and tinder. Used in fly fishing. Manufactured into hats, bags, and clothing. Historical use in surgery and dentistry. Traditional medicine across cultures.

Fascinating Facts

  • Carried by Ötzi the Iceman 5,300 years ago
  • Processed into amadou, a felt-like material
  • Burns slowly like charcoal when dried
  • Used for fire-starting across millennia
  • Inner layer can be made into clothing and hats
  • Perennial - adds growth layer each year
  • Can persist on dead trees for decades
  • Smoke from burning amadou used in beekeeping to calm bees