Peter Lewis / Bearded tooth fungus / Tree hedgehog fungus (Hericium erinaceus) Droxford, Hampshire, England, UK.

Peter Lewis / Bearded tooth fungus / Tree hedgehog fungus (Hericium erinaceus) Droxford, Hampshire, England, UK.

Peter Lewis / Bearded tooth fungus / Tree hedgehog fungus (Hericium erinaceus) Droxford, Hampshire, England, UK.

Adrian Davies / Tiered tooth fungus (Hericium cirrhatum) Sussex, England, UK. September.

Adrian Davies / Tiered tooth fungus (Hericium cirrhatum) Sussex, England, UK. September.

Adrian Davies / Tiered tooth fungus (Hericium cirrhatum) Sussex, England, UK. September.

Robert Thompson / Earpick fungus (Auriscalpium vulgare) County Roscommon, Northern Ireland, October.

Cyril Ruoso / Coral tooth fungus (Hericium coralloides), Alberes Mountains, Pyrenees, France, October.

Cyril Ruoso / Coral tooth fungus (Hericium coralloides), Alberes Mountains, Pyrenees, France, October.

Cyril Ruoso / Coral tooth fungus (Hericium coralloides) Alberes mountains, Pyrenees, France. September.

Cyril Ruoso / Coral tooth fungus (Hericium coralloides), Alberes Mountains, Pyrenees, France, September.

Adrian Davies / View of the underside of the cap of an Ear-pick fungus (Auriscalpium vulgare), showing spines, Surrey, England, UK, October.

Adrian Davies / Ear-pick fungus (Auriscalpium vulgare) growing from a buried pine cone, excavated for photograph, Surrey, England, UK, September.

Doug Wechsler / Lion's Mane Mushroom (Hericium erinaceus) on red maple snag, Blackbird State Forest, New Castle County, Delaware, USA, November.

Eric Baccega / Toothed coral fungus (Hericium Coralloides) growing on tree. Cap Breton Highlands National Park, Nova Scotia, Canada, September

Eric Baccega / Toothed coral fungus (Hericium Coralloides) growing on tree. Cap Breton Highlands National Park, Nova Scotia, Canada, September

Adrian Davies / Toothed coral fungus (Hericium coralloides) on fallen Beech branch, Endangered species, Sussex, England

Adrian Davies / Toothed coral fungus (Hericium coralloides) on fallen Beech branch, Endangered species, Sussex, England

Wild Wonders of Europe / Biancarelli / Bearded tooth fungus (Hericium erinaceum) and Polypore bracket growing on European beech (Fagus sylvatica) trunk, Beech wood in Plitvice Lakes National Park, Croatia, October 2008

Wild Wonders of Europe / Biancarelli / Bearded tooth (Hericium erinaceum) close-up, Plitvice Lakes National Park, Croatia, October 2008

Philippe Clement / Bearded tooth fungus (Hericium erinaceum) on tree trunk, Belgium

Philippe Clement / Bearded tooth fungus {Hericium erinaceus} on tree stump, Belgium

Philippe Clement / Bearded tooth fungus {Hericium erinaceus} on tree stump, Belgium

Philippe Clement / Bearded tooth fungus detail {Hericium erinaceus} Belgium

John Waters / Coral tooth fungus {Hericium coralloides} Bialowieza National Park, Poland

Simon Colmer / Bearded tooth fungus (Hericium erinaceum), UK.

John Waters / Coral Tooth Fungus (Hericium coralloides) on fallen log Bialowieza National Park, Poland

Philippe Clement / Bearded tooth fungus on tree stump {Hericium erinaceus} Belgium

George McCarthy / Toothed coral fungus {Hericium coralloides} Sussex, UK

George McCarthy / Bearded tooth fungus {Hericium erinaceus} on tree trunk UK

Andy Sands / Tiered tooth fungus (Hericium cirrhatum), impressive and rare fungi, growing on underside of ancient fallen Beech (Fagus sp) tree. Hertfordshire, England, UK. September. Focus Stacked.

Andy Sands / Close-up of Tiered tooth fungus (Hericium cirrhatum), impressive and rare fungi, growing on underside of ancient fallen Beech (Fagus sp) tree. Hertfordshire, England, UK. September. Focus Stacked.

Guy Edwardes / Bearded tooth fungus (Hericium erinaceus) growing inside tree hole of Beech tree (Fagus sylvatica) with Common garden snails (Cornu aspersum) hibernating around it. Dorset, England. December.

Adrian Davies / Coral tooth fungus (Hericium coralloides) growing on an old Beech tree trunk, Surrey, UK. November.

Adrian Davies / Coral tooth fungus (Hericium coralloides) growing on an old Beech trunk, Surrey, UK. November.

Guy Edwardes / Bearded tooth fungus (Hericium erinaceus) on oak, close-up showing structure, Rhodope Mountains, Bulgaria. November.

Guy Edwardes / Bearded tooth fungus (Hericium erinaceus) on oak in broadleaved woodland, Rhodope Mountains, Bulgaria. November.

Guy Edwardes / Bearded tooth fungus (Hericium erinaceus) on oak, Rhodope Mountains, Bulgaria. November.

Andy Sands / Bearded tooth fungus (Hericium erinaceus), a large football-sized fruiting body on inside of hollow Beech tree, Buckinghamshire, England, UK, October.

Linda Pitkin / Bearded tooth fungus (Hericium erinaceus), Naphill Common (SSSI), Buckinghamshire, England, October.

Linda Pitkin / Bearded tooth fungus (Hericium erinaceus), Naphill Common (SSSI), Buckinghamshire, England, November.

Adrian Davies / Bearded tooth fungus (Hericium erinaceus) On Beech. Buckinghamshire, UK. Rare in UK.

Adrian Davies / Bearded tooth fungus (Hericium erinaceus) on old beech tree, rare species, Buckinghamshire, England, UK, October.

Adrian Davies / Bearded tooth fungus (Hericium erinaceus) rare species, Buckinghamshire, England, UK, October.

Adrian Davies / Bearded tooth fungus (Hericium erinaceus) rare species, Buckinghamshire, England, UK, October.

Adrian Davies / Bearded tooth fungus (Hericium erinaceus) rare species, Buckinghamshire, England, UK, October.

Adrian Davies / Bearded tooth fungus (Hericium erinaceus) rare species, Buckinghamshire, England, UK, October.