Adrian Davies / Wood hedgehog fungus (Hydnum repandum) ring in deciduous woodland. Surrey, England, UK. September, 2017.

David Kjaer / Hedgehog fungus (Hydnum repandum) Hampshire, UK

Adrian Davies / Wood hedgehog (Hydnum repandum) fungi, upturned to show spines, Surrey, England, UK, September.

Adrian Davies / Wood hedgehog (Hydnum repandum) fungi, upturned to show spines, Surrey, England, UK, September.Edible

Adrian Davies / Wood hedgehog (Hydnum repandum) fungi growing in woodland, Surrey, England, UK, September. Edible

George McCarthy / Hedgehog fungus {Hydnum repandum} UK

Igor Shpilenok / Tiled mushrooms {Hydnum imbricatum}, Kandalakshsky Zapovednik, Russia.

Duncan Mcewan / Hedgehog fungus in beechwood {Sarcodon/ Hydnum repandum} Scotland, UK

Duncan Mcewan / Hedgehog fungus {Hydnum repandum} Scotland

Yva Momatiuk & John Eastcott / Scaly Hedgehog (Sarcodon imbricatus) mushroom in forest, Yukon, Canada

Yva Momatiuk & John Eastcott / Scaly Hedgehog (Sarcodon imbricatus) mushroom in forest, Yukon, Canada

Yva Momatiuk & John Eastcott / Scaly Hedgehog (Sarcodon imbricatus) mushrooms, Yukon, Canada