Key takeaways
- A fruiting body is the spore-producing structure we call a mushroom.
- It forms from mycelium when conditions are right.
- Fruiting bodies can be gilled, pored, toothed or club-shaped.
- Fruiting bodies and mycelium can differ in composition.
“Fruiting body” appears throughout the Library, and on many mushroom labels. This article explains exactly what it is.
A definition
A fruiting body is a reproductive structure built by the mycelium to produce and release spores. Mushrooms, brackets and puffballs are all fruiting bodies.
How it forms
When conditions are right, hyphae gather and grow together into a dense, organised structure: the fruiting body. See The Mushroom Life Cycle Explained.
Different shapes
- Gilled, such as Oyster mushrooms.
- Pored brackets, such as Reishi.
- Toothed, such as Lion’s Mane, with spines.
- Club-shaped, such as Cordyceps militaris.
Fruiting body versus mycelium
Though made of the same fungus, the fruiting body and mycelium can differ in composition. In Lion’s Mane, for example, hericenones are associated with the fruiting body and erinacines mainly with the mycelium. See Fruiting Body vs Mycelium.
A special case: chaga
What is harvested as chaga isn’t a fruiting body but a sterile mass. See Why Chaga Is Not Technically a Mushroom.
Why it matters on a label
“Fruiting body” on a label tells you the product is made from the mushroom itself rather than mycelium or grain. See Fruiting Body Mushroom Extracts: What Buyers Should Know.