The largest and main part of the fungus is hidden within the substrate that the fruiting body grows from, whether that’s the soil, rotting wood, dung or even nuts and seeds. It’s a dense, tangled network of threads (called hyphae) that together are known as a mycelium.
These networks can stretch for metres (or in rare cases miles) through the soil, connecting fungi to the roots of trees, grasses and other plants. Typically, this coexisting is symbiotic: the fungus gives the plant nutrients from the soil and the plant supplies the fungus with carbohydrates formed through photosynthesis.
The fruiting bodies of fungi produce microscopic spores, which need to be dispersed in the same way as seeds from a tree. Some fungi fire out their spores like a cannon, launching them into the air. The puffball is a common species well known for its explosive release of spores – when a mature mushroom is compressed by rain or a passing animal it puffs out a cloud of spores from a hole in the top.