Parts of a Mushroom: Anatomy & Functions Explained

If you're looking for the parts of a mushroom: anatomy, names, and what each piece does, you're in the right place. Every mushroom has two main sections. The fruiting body is the part you see, made up of the cap, the gills or pores underneath, the stem, and sometimes a ring and a volva. The mycelium is a hidden network of thin threads called hyphae that feeds the fungus from below. Spores form under the cap and start the next generation.

Below, we walk through the parts of a mushroom one by one. You will see how they work together and why mushroom anatomy matters when you read a supplement label.

📖 Table of Contents

1. Key Takeaways
2. Mushroom Anatomy at a Glance
3. The Fruiting Body: The Part You Can See
4. The Cap (Pileus)
5. Gills, Pores, and Teeth
6. The Stem (Stipe)
7. The Ring and the Volva
8. Spores
9. The Mycelium: The Part You Rarely See
10. How the Different Parts of a Mushroom Work Together
11. Mushroom Anatomy of Four Functional Mushrooms
12. What Are the Beneficial Parts of Mushrooms?
13. FAQs About the Parts of a Mushroom
14. What Are the Main Parts of a Mushroom?
15. Which Part of a Mushroom Do You Eat?
16. Do All Mushrooms Have Gills?
17. Is Mycelium Part of a Mushroom?

Key Takeaways:

• A mushroom has two main parts: the fruiting body, which you can see, and the mycelium, the hidden network that feeds and grows the fungus.
  
  
• The cap, gills, pores, teeth, stem, ring, volva, and spores each play a specific role in mushroom growth and reproduction.
  
  
• Spores start new fungal growth, while hyphae join together to form the mycelium, which can grow for years before producing a fruiting body.
  
  
• Functional mushrooms have different structures—for example, Lion’s Mane has spines, Cordyceps is club-shaped, Reishi has pores, and Turkey Tail has tiny pores without a stem.
  
  
• When choosing mushroom supplements, check the species, mushroom part used, extract ratio, and third-party testing to understand what you are actually buying.

Mushroom Anatomy at a Glance

Use this table as a quick reference for the parts of a mushroom and what each one does.

The Fruiting Body: The Part You Can See

The fruiting body is what most of us call "the mushroom." Think of it like an apple on a tree. The apple is not the whole tree. It is the part built to spread seeds. The fruiting body also holds most of the parts of a mushroom that you can name.

A mushroom works the same way, except it spreads spores. Most of the living fungus stays out of sight as mycelium. The fruiting body shows up, releases spores, and fades.

Here is a detail of mushroom anatomy that most guides skip. The fruiting body is made of hyphae, too. The threads just pack together tightly to form solid tissue. Their cell walls contain chitin, the same tough material found in insect shells.

The Cap (Pileus)

The cap sits on top and protects the spore-making surface below it. Caps come in many shapes, including:

• Convex (rounded like a dome)
  
  
• Flat
  
  
• Bell-shaped
  
  
• Funnel-shaped
  
  
• Umbonate (with a small knob in the center)

Caps change as they age. A young button mushroom is round, then opens and flattens. Surfaces can be smooth, sticky, scaly, or velvety.

Gills, Pores, and Teeth

Flip a mushroom over, and you will usually find one of three spore surfaces.

Gills are thin, paper-like blades that fan out from the stem. You see them on button and portobello mushrooms.

Pores look like a sponge. Each tiny hole leads to a tube where spores form. Boletes and shelf-like polypores have pores.

Teeth, or spines, hang down like icicles. Lion's Mane is the best-known example.

Some mushrooms, like chanterelles, have ridges that look like gills. These "false gills" are blunt folds that will not peel away cleanly. True gills often do.

You can see spore surfaces in action at home. Remove the stem from a store-bought mushroom. Place the cap gill-side down on paper and cover it with a bowl overnight. In the morning, you will find a spore print. Button and cremini mushrooms leave a dark brown print.

The Stem (Stipe)

The stem lifts the cap off the ground. That extra height helps spores catch air currents.

Not every mushroom has a centered stem. Some attach off to the side. Shelf fungi, like Turkey Tail, may have no stem at all.

The Ring and the Volva

Some young mushrooms grow inside protective layers called veils.

A partial veil covers the gills while they develop. As the cap opens, it tears and leaves a ring on the stem. This is the annulus. Look closely at a button mushroom, and you may see this thin skin between the cap edge and the stem.

A universal veil wraps the entire young mushroom like an eggshell. When the mushroom pushes out, the veil breaks. It often leaves a cup at the base of the stem called the volva. Bits may also stick to the cap as spots.

This part matters for safety. Many Amanita species have a volva, and this group includes some of the most toxic mushrooms known. The volva can hide under the soil. Please never eat a wild mushroom based on a diagram or an app. You can learn more in our guide to types of edible mushrooms.

Spores

Spores are microscopic cells that act like seeds. A single mushroom can release billions of them. Wind, water, insects, and animals carry them to new places. When a spore lands somewhere with the right food and moisture, it sprouts its first hyphae.

The Mycelium: The Part You Rarely See

In mushroom anatomy, mycelium is the main body of the fungus. It is a network of hyphae, each thread so thin you usually cannot see it alone. Together, they spread through soil, logs, leaf litter, or other food sources.

Mycelium is often called the mushroom's "roots." That comparison helps, but it is not exact. Fungi are not plants. Mycelium releases enzymes that break down dead material outside its body. Then it absorbs the nutrients. We explain more in our guide to mycelium.

Mycelium can grow for years without making a single mushroom. Some networks get huge. One honey mushroom in Oregon's Blue Mountains is often cited as one of the largest living things on Earth, spreading across nearly four square miles.

How the Different Parts of a Mushroom Work Together

The different parts of a mushroom form one loop:

1. A spore lands in a good spot and sprouts hyphae.
   
   
2. Hyphae branch and join into a mycelium network.
   
   
3. The mycelium feeds and grows.
   
   
4. When moisture, temperature, and food line up, it forms tiny knots called pins.
   
   
5. Pins grow into fruiting bodies.
   
   
6. The fruiting body releases spores, and the loop starts again.

Every mushroom comes from mycelium. Not all mycelium makes mushrooms.

Mushroom Anatomy of Four Functional Mushrooms

The parts of a mushroom can look very different from one species to the next. The four mushrooms we work with each bend the classic diagram.

1. Lion's Mane (Hericium erinaceus) has no typical cap or gills. It grows as a white, shaggy clump of soft spines. Its spores form on those spines.
   
   
2. Cordyceps (Cordyceps militaris) is orange and club-shaped. It has no cap and no gills. Its spores form in tiny flask-shaped chambers near the tip.
   
   
3. Reishi (Ganoderma lucidum) has a shiny, woody, kidney-shaped cap. It has pores underneath and often a short stem attached at the side. Learn how to spot it in our Reishi look-alikes guide.
   
   
4. Turkey Tail (Trametes versicolor) is thin, fan-shaped, and striped. It has no stem and tiny pores underneath. A look-alike called false turkey tail has a smooth underside. Our Turkey Tail vs. false Turkey Tail guide shows the difference.

Our Clarity Gummies pair 10:1 Lion's Mane and 7:1 Cordyceps extracts. Our Unwind Gummies pair 250 mg each of 10:1 Reishi and Turkey Tail extracts. Our Thrive Gummies bring all four mushrooms together in one gummy.

What Are the Beneficial Parts of Mushrooms?

When people search for the beneficial parts of mushrooms, they usually want to know which part a supplement is made from. That question comes down to the fruiting body versus the mycelium.

Fruiting body extracts come from the mushroom itself. Mycelium products are often grown on grain, such as rice or oats. The grain and mycelium can be hard to separate, so some of that starch may end up in the final powder.

Compounds like beta-glucans are often measured to compare mushroom products. Their levels can differ by species and by which part was used. We cover this in depth in our fruiting body vs. mycelium guide and our beta-glucan explainer.

So there is no single best part for every species. A clear label is your best tool. Before you buy, check for:

• The species name, ideally in Latin
  
  
• The part of the mushroom used
  
  
• The extract ratio, such as 10:1
  
  
• Third-party testing

You can also learn how extraction works in our mushroom extract vs. powder guide. When you are ready to compare formulas, browse our Mushroom Gummies collection.

FAQs About the Parts of a Mushroom

What Are the Main Parts of a Mushroom?

The main parts of a mushroom are the cap, gills or pores, stem, ring, volva, spores, and mycelium. Not every species has all of them.

Which Part of a Mushroom Do You Eat?

With culinary mushrooms, you usually eat the fruiting body, meaning the cap and stem.

Do All Mushrooms Have Gills?

No. Many mushrooms have pores, teeth, or ridges instead. Lion's Mane has spines, and Reishi and Turkey Tail have pores.

Is Mycelium Part of a Mushroom?

Yes. Mycelium is the main body of the fungus. The mushroom you see is its fruiting body.

The Bottom Line

Once you know the different parts of a mushroom, every mushroom you see makes more sense. The cap, gills, and stem handle spores. The mycelium does the quiet work underground. And a good label tells you exactly which of the parts of a mushroom you are getting.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results vary. Always speak with a qualified healthcare provider before starting a new supplement, especially if you take medication or have a medical condition.