Western Australia is home to an extensive array of fungi, including numerous species of mushrooms. While some mushrooms are considered edible and highly sought after by foragers, others are dangerously toxic and can cause severe illness, or even death if ingested. Identifying the difference between these poisonous mushrooms and their harmless counterparts is essential. This guide will provide you with the necessary information to spot potentially toxic species commonly found in Western Australia.

An Overview of Poisonous Mushrooms in Western Australia

In Western Australia, there are three main types of poisonous mushrooms: Amanita, Galerina, and Lepiota. The most dangerous and widespread of these is the Amanita family, which is responsible for the majority of mushroom poisoning fatalities around the world. Some of the most notorious members of the Amanita genus are the Death Cap (Amanita phalloides) and Destroying Angels (Amanita bisporigera, Amanita ocreata, and Amanita virosa). These mushrooms contain amatoxins, which are toxic compounds that can lead to liver and kidney failure and ultimately, death.

Galerina and Lepiota mushrooms also contain deadly toxins. The Autumn Galerina (Galerina marginata), for example, contains the same amatoxins found in the Amanita species. Another dangerous mushroom in the Lepiota family is the False Parasol (Chlorophyllum molybdites) which contains toxins that cause severe gastrointestinal distress and vomiting.

Key Characteristics to Identify Poisonous Mushrooms

Amanita Mushrooms

  • Cap: The cap can range in color from white to brown, yellow, or greenish hues. The Death Cap often has a pale green cap, while the Destroying Angels typically have a smooth, white cap.
  • Gills: White or pale gills that are free from the stem.
  • Stem: A slim, white stem with a bulbous base and a ring, or annulus (a collar-like structure).
  • Volvulus: A bag-like or cup-shaped structure called a volva is present at the base of the stem.

Galerina Mushrooms

  • Cap: Medium-sized, convex to bell-shaped, and commonly brown.
  • Gills: Typically brown and attached to the stem.
  • Stem: Slender, fibrous, and brown, sometimes with a ring.
  • Spore Print: Rusty-brown, which can help differentiate them from harmless and edible species that have a white, pink, or light-colored spore print.

Lepiota and Chlorophyllum Mushrooms

  • Cap: Large, umbrella-shaped, and can be white, green, or brown. The False Parasol has greenish scales on the cap surface.
  • Gills: White or off-white, free from the stem.
  • Stem: White, with a ring structure and a bulbous base.
  • Spore Print: Greenish color, which can be an important identifying characteristic.


It is crucial to be cautious when foraging for mushrooms in Western Australia. Understanding the key features of poisonous species is an important first step to staying safe. Keep in mind that mushrooms can vary in appearance depending on factors such as age and environment. If you are not absolutely certain of a mushroom’s identity, do not consume it. It is always better to err on the side of caution when it comes to wild mushrooms, as ingesting even a small amount of a toxic species can lead to severe complications or death.

Frequently Asked Questions

Are all wild mushrooms in Western Australia poisonous?

No, not all wild mushrooms in Western Australia are poisonous. There are many edible species found in the region. However, it is important to be cautious and knowledgeable when foraging, as misidentification can lead to serious consequences.

What should I do if I think I have eaten a poisonous mushroom?

If you or someone you know has ingested a mushroom you suspect to be poisonous, seek medical help immediately. Early treatment can be crucial in preventing damage or fatalities. Do not wait for symptoms to appear, as this may be too late.

How can I learn more about mushroom identification?

Attend a local workshop or seek advice from an experienced forager, join a local mycological group, or study mushroom identification books and online resources. Remember that practice and experience are key, and never consume a wild mushroom unless you are absolutely sure of its identity.



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