Doug Wechsler / Mushroom (Gymnopus quercophilus) Armentrout Preserve, Pennsylvania, USA, September.

Matthew Maran / Clouded funnel mushroom (Clitocybe nebularis) Hampstead Heath, London, England, UK. October.

Paul Hobson / Russet toughshank (Collybia dryophila), Nottinghamshire, UK, November.

Thomas Marent / Clustered Toughshank Mushroom (Gymnopus confluens), Switzerland

Robert Thompson / Russet toughshank (Gymnopus dryophilus) toadstool cluster growing in forest floor, Ards Forest Park, County Donegal, Republic of Ireland, September.

Robert Thompson / Clustered toughshank mushroom (Gymnopus confluens) cluster, growing from forest floor, Gosford Forest Park, County Armagh, Northern Ireland. September.

Linda Pitkin / Clouded funnel mushroom (Clitocybe nebularis), Sussex, England. November.

Nick Upton / Bonnet pin mould (Spinellus fusiger) growing from cap of Russet toughshank mushroom (Collybia dryophila), GWT Lower Woods reserve, Gloucestershire, UK, October.

Nick Upton / Russet toughshank mushrooms (Collybia dryophila) emerging from rotting log, GWT Lower Woods reserve, Gloucestershire, UK, October.

Nick Upton / Russet toughshank mushrooms (Collybia dryophila) emerging from rotting log with one infected by Bonnet pin mould (Spinellus fusiger), GWT Lower Woods reserve, Gloucestershire, UK, October.

Guy Edwardes / Clouded agaric fungus (Clitocybe nebularis). New Forest National Park, England, UK. August.

Linda Pitkin / Magpie inkcap fungus (Coprinopsis picacea), Sheepleas Surrey Wildlife Trust Reserve, England, UK. October.