Mushrooms and the Hidden Web
A mushroom may look like a small plant, but it is not one. Mushrooms belong to a group called fungi. Fungi are neither plants nor animals. They cannot make food from sunlight the way green plants do, so they must get food from other things.
The part you see above ground is only a small piece of the fungus. Most of it is hidden in the soil or inside a rotting log. There it grows as a web of thin white threads called mycelium. The threads spread through the material and take in the food around them.
When the time is right, the web pushes up a mushroom. Its job is to make spores, which are tiny specks that work a bit like seeds. Many mushrooms have thin folds called gills under the cap, and the spores drop from them. Wind carries the spores away, and some may land in a good spot and start a new web.
Fungi are important to forests. Many of them break down dead leaves and wood, which returns nutrients to the soil. Other fungi attach to tree roots and help the trees take in water and minerals. Never eat a wild mushroom, because some are poisonous and only an expert can tell them apart.