A very old joke…
– What’s the smallest room in the world?
– A mushroom!
But what is a mushroom?
Mushrooms are neither plants (kingdom Plantae) nor animals (kingdom Animalia). They are fungi. What we typically recognise as a mushroom is the fruiting body of certain types of fungus. Mushrooms “live on land, in the water, in the air, and even in and on plants and animals. They vary widely in size and form, from the microscopically small to the largest organisms on Earth (at several square miles large)” (Keating, 2017). However, we commonly recognise them when they form above ground (e.g., on soil, in leaf litter, within blankets of moss) or on their food source (e.g., fallen tree branches, trunks of living trees).