
Mushrooms are a type of fungus, and while most people are familiar with the umbrella-like shape of the common mushroom, there are over 14,000 species with unique characteristics. The part of the mushroom that we see is called the fruiting body or sporophore, and it is the fruit of a much larger underground fungus. The fruiting body consists of a cap, gills, pores, ridges, and sometimes teeth, all supported by a sturdy stem. Beneath the surface, mushrooms have a complex network of cells called mycelium, which spreads out over large distances to absorb nutrients and connect with other fungi.
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What You'll Learn
- The cap, also called the pileus, is the most recognisable part of a mushroom. It can be dome-shaped, flat, funnel-shaped, or even resemble an umbrella
- The stem, or stipe, is the supportive structure that connects the cap to the ground
- The gills, or lamellae, are located on the underside of the cap and contain tiny structures called spores, which are responsible for mushroom reproduction
- The mycelium is the underground part of the fungus that we seldom see. It's like a plant's root network, absorbing nutrients and connecting to other fungi
- The mushroom's veil refers to the volva at the base, the annulus around the stem, warts on the cap, or

The cap, also called the pileus, is the most recognisable part of a mushroom. It can be dome-shaped, flat, funnel-shaped, or even resemble an umbrella
The cap, also known as the pileus, is the most recognisable part of a mushroom. It is the topmost part of the mushroom, giving it its distinctive umbrella-like shape. The cap can vary in shape, being dome-shaped, flat, funnel-shaped, or even resembling an umbrella. Some mushrooms, like the lion's mane, have "teeth" or shaggy hair-like structures that hang around the mushroom and produce spores, instead of a spherical dome cap. The colour and texture of the cap can vary depending on the species and the mushroom's stage of development. For instance, the cap of a mature mushroom may differ in colour and texture from when it was immature.
The cap houses the spore-producing surface of the mushroom, which is made up of gills, pores, ridges, or teeth. The gills are thin, paper-like structures that often hang from the underside of the cap and come in various colours. They produce and disperse billions of microscopic spores, which contain all the genetic material required to grow new mushrooms. The function of the cap is to protect the spore-producing surface, much like an umbrella protects a person from the rain or sun.
The cap is also where scales may be found. Scales are a thin layer of veil tissue that forms hard-shelled protection for the fungus. They often appear as a result of cracking during the expansion of the cap and can be useful in identifying mushrooms, as many species have them.
The cap of a mushroom is not always curved like a hat or an umbrella. Some mushrooms have a flat cap, while others may have a conical or spherical shape. The stalk (also called the stipe or stem) may be central and support the cap in the middle, or it may be off-centre or absent altogether. The stem is a relatively large and sturdy cylindrical part that supports the cap, similar to how an umbrella handle supports the umbrella.
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The stem, or stipe, is the supportive structure that connects the cap to the ground
The stem of a mushroom, also known as the stipe or stalk, is a supportive structure that connects the cap to the ground. It is a relatively large and sturdy cylindrical part that supports the cap of the mushroom. The stem can be central and support the cap in the middle, or it may be off-centre or lateral, as in species of Pleurotus and Panus. In some mushrooms, such as polypores, a stalk may be absent, and instead, they have a supporting base. The basal bulb, or the lower round part of the stem, is connected to the mycelium, which is an extensive network of cells that spread underground in search of nutrients.
The mycelium is a vital part of a mushroom's growth and survival. It forms the underground part of the fungus that we seldom see. It grows by absorbing nutrients from dead and decaying organic matter, tree bark, and plant roots. The mycelium of some mushroom species can spread over large areas.
The stem of a mushroom can have veil remnants in the form of a ring or annulus. This ring is a partial veil that surrounds and protects the gills during the mushroom's growth. As the mushroom cap expands, it outgrows the veil, causing the veil to break and form a ring around the stem. This ring can be useful for identifying mushrooms, as its thickness, colour, and shape vary among species.
The intricate relationship between the stem and the mycelium highlights the complexity of mushroom anatomy. While the stem provides structural support, the mycelium plays a crucial role in nutrient absorption and transportation. Together, they contribute to the overall growth and survival of the mushroom.
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The gills, or lamellae, are located on the underside of the cap and contain tiny structures called spores, which are responsible for mushroom reproduction
Mushrooms are fungi, neither plants nor animals, and are made up of many different parts. The mushroom itself, or the 'fruiting body', is the part we see and cook with, but there is much more to mushrooms than meets the eye.
The cap of the mushroom is the most visible part, and it sits on top of the mushroom's stalk. It is also known as the pileus and is usually curved and shaped like a hat or umbrella. The cap holds the gills, or lamellae, which are located on the underside of the cap. The gills are thin, paper-like structures that produce and disperse spores. These spores are microscopic, unicellular reproductive cells that contain the genetic material required to grow new mushrooms. The gills are protected by the cap, which shields them from the elements, much like an umbrella.
The gills, or lamellae, are responsible for mushroom reproduction. They produce and release spores, which are then dispersed through the air, or via animals and insects. When spores land in an ideal spot with the right growing conditions, they germinate, producing thread-like filaments called hyphae, which grow, interconnect and form mycelium. The mycelium is the underground part of the fungus that we seldom see, but it is the primary component of a mushroom and is crucial for the fungus's growth. It is a vast, complex network of cells that form thin fibres, like plant roots, and spread under the forest floor in search of nutrients.
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The mycelium is the underground part of the fungus that we seldom see. It's like a plant's root network, absorbing nutrients and connecting to other fungi
Mushrooms are a collection of species that belong to the fungi kingdom. They are neither animals nor plants. The part of the mushroom that is visible to us is called the fruiting body, which is the part we cook, see in pictures, or encounter in nature. This is the "mushroom" that grows above the ground or on the surface of a host. Its purpose is to produce and distribute spores so that the fungus can reproduce.
However, there is a lot more to a mushroom than meets the eye. Beneath the surface lies the mycelium, a network of cells that form thin fibres, similar to plant roots. The mycelium is the primary component of a mushroom and is responsible for its growth. It is the part of the fungus that we seldom see, existing underground and out of sight.
The mycelium is a vast, complex network of cells that can spread out for miles. It is made up of thread-like filaments called hyphae, which grow, interconnect, and form the mycelium. These microscopic structures absorb nutrients from the environment and transport them to other parts of the fungus. The mycelium grows by absorbing nutrients from dead and decaying organic matter, such as tree bark and plant roots. It extends the area in which fungi can find nutrients, as they are stationary organisms.
The mycelium is also responsible for connecting multiple mushroom fruiting bodies. It forms an intricate network that connects different fungi to each other. This network helps to feed the mushrooms by transporting nutrients from one fungus to another.
In summary, the mycelium is the underground part of the fungus that remains hidden from view. It is similar to a plant's root network, absorbing nutrients and connecting different fungi together.
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The mushroom's veil refers to the volva at the base, the annulus around the stem, warts on the cap, or
Mushrooms are a collection of species that belong to the fungi kingdom. They are neither plants nor animals. The visible mushroom (or fruiting body) that we see growing from the ground or on trees is just a small part of the fungi's anatomy.
The mushroom veil is one of the most intriguing features of a mushroom. It is a thin layer of tissue that forms part of a mushroom's anatomy and serves a protective role during critical phases of the mushroom's development. The veil is a temporary structure that acts as a cloak to guard the gills or pores as the mushroom matures.
The mushroom veil can remain on the mature mushroom in various forms, including the volva at the base, the annulus around the stem, warts on the cap, or the ring/skirt. The volva is a cup-like structure or series of rings at the base of the stalk, which can be a critical feature in identifying species. The annulus, or ring zones, are remnants of the partial veil that forms as the mushroom matures and can also be key indicators in the mushroom's identification.
The universal veil is a membrane that encases the entire mushroom during its initial developmental stages. It helps to maintain the proper humidity and temperature for the developing mushroom, acting like a soft eggshell that can be peeled away without damaging the mushroom inside. As the mushroom grows, it breaks out of the universal veil, which can sometimes be seen in the forest. The universal veil then ruptures, leaving remnants on different parts of the mushroom.
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Frequently asked questions
There are two main parts to a mushroom fungus: an above-ground fruiting body or sporophore and the underground mycelium. The mycelium is the main part of a mushroom and is vital for its growth.
The mushroom cap, also known as the pileus, is the structure on top of the mushroom that holds the gills, pores, and ridges. The cap is often the most striking part of the fungus and comes in a wide range of shapes, sizes, colours, and textures.
The veil, or velum, is a thin, transient membrane that protects the developing reproductive structures of certain mushroom species. It is crucial for guarding young, developing mushrooms and maintaining the integrity of the gills and spores.
The mycelium is a vast, complex network of cells that form thin fibres, like plant roots, and spread under the forest floor in search of nutrients. It absorbs nutrients from dead and decaying organic matter.

























