6 Common Mushrooms Found in Wyoming! (2024)

What kind of mushroom did I find in Wyoming?

Types of mushrooms in Wyoming

If you spend time outside, you’ve probably asked this question at least once. Mushrooms are incredibly common in Wyoming, and they come in all shapes, sizes, and colors.

Believe it or not, there are THOUSANDS of different types of mushrooms that live in Wyoming. Since it would be nearly impossible to write about them all, I focused on the most common types that are seen.

IMPORTANT: You should NEVER eat a mushroom you find. There are many poisonous types, and some species will kill you. So stay safe, and don’t eat any wild mushrooms unless you are with a mycologist (mushroom expert)!

6 COMMON MUSHROOMS in Wyoming:


#1. Fly Agaric

  • Amanita muscaria

Types of mushrooms in Wyoming

Identifying Characteristics:

  • Caps are 8–20 cm (3–8 in) in diameter.
  • The stalks are 5–20 cm (2–8 in) tall.
  • These mushrooms have the typical looks of a “toadstool” with a bright white stalk and red, white-spotted cap.

I think this is the CUTEST mushroom in Wyoming! 🙂

Fly Agaric looks just like the mushrooms found in Mario video games.

These mushrooms are considered toadstools, which are usually poisonous to humans. Fly Agaric is no exception. This fungus can cause hallucinations, low blood pressure, nausea, loss of balance, and in rare cases, death. If you ingest it, you should seek medical treatment immediately.

Luckily, Fly Agaric is a very conspicuous fungus in its fully-grown form. However, young mushrooms can be mistaken for other edible types, so you should steer clear of eating any wild mushrooms.


#2. Oyster Mushrooms

  • Pleurotus ostreatus

Identifying Characteristics:

  • The caps are 2–30 cm (0.8–12 in) wide.
  • They are fan-shaped with thick stalks and grow in a stacked pattern or irregular clusters.
  • Their coloring is often white or off-white, sometimes with a light purple or gray wash.

You can find Oyster Mushrooms in Wyoming both in the wild and on farms.

These mushrooms are often used as food and are commercially farmed worldwide. In fact, they were first cultivated in Germany during World War I to mitigate hunger because of rationing. As a result, you can find these mushrooms in most grocery stores, so eat those instead of a wild variety!

Something most people don’t know is that Oyster Mushrooms are carnivorous! This species eats nematodes that you might know as roundworms. They paralyze and consume the nematodes as a source of protein and nitrogen. Additionally, Oyster Mushrooms help to decay dead trees.

Pearl Oyster Mushrooms are also dried and used as a leather-like material or compressed into a wood substitute to make furniture. Mycelium, which is the fiber that gives Oyster Mushrooms their structure, is incredibly strong and resilient. Check out this page for more info!


#3. Shaggy Mane

  • Coprinus comatus

Identifying Characteristics:

  • The caps are 4–8 cm (1.63.1 in) wide and 6–20 cm (2.3–8 in) tall.
  • Their coloring is white when they first emerge, slowly turning black as their scales lift.
  • These mushrooms grow directly from the ground as single caps or clusters.

It’s easy to see how Shaggy Mane Mushrooms in Wyoming got their name!

These tall, slender mushrooms have distinctive scales that make them look like they’re covered in shaggy hair. They often grow in suburban yards or fields straight from the ground.

Shaggy Manes definitely have some “yuck” factors. They’re called Ink Caps because their black gills liquefy and leak down the mushroom to release its spores. Additionally, the entire mushroom will “auto-decay,” digesting itself into a dark liquid within hours of being picked.

Shaggy Manes look very similar to poisonous mushrooms that are found in Wyoming. Leave these mushrooms where you found them, and never eat them!


#4. Mica Cap

  • Coprinellus micaceus

Identifying Characteristics:

  • The bell-shaped caps are 1–2.5 cm (.5–1 in) in diameter when new and expand up to 5 cm (2 in) as they open.
  • These mushrooms grow in dense clusters of bell-shaped caps with long, thin stems. The caps have grooves that run vertically, giving them the appearance of a head of straight hair.
  • Their coloring is grayish brown.

This unassuming mushroom has a creepy talent – it can self-destruct! Mica Cap autodigests within a few hours of being picked, meaning its flesh turns from a spongy white structure into an inky black liquid. Yuck!

Mica Cap is usually found in clusters at the base of deciduous trees in mature forests. This mushroom’s less-than-appetizing qualities are just one reason I recommend never eating wild mushrooms. Additionally, there’s a high likelihood of ingesting a poisonous mushroom by mistake.

If you see Mica Cap in the wild, it’s best to take a picture of the fascinating clusters and then leave it be. After all, if you pick it, you’re likely to be covered in gross black goo!


#5. Common Puffball

  • Lycoperdon perlatum

Identifying Characteristics:

  • Mature specimens are 1.5-6 cm (0.6 to 2.3 in) wide by 3-10 cm (1-4 in) tall.
  • Their coloring is white to off-white, with spines and warts that are varying shades of brown.
  • The shape varies from pear-shaped to spherical with a wide stalk.

It’s easy to find Common Puffball Mushrooms in Wyoming.

These distinctive fungi grow in gardens, yards, roadsides, and forest clearings. They’re easy to find because of their large size and bright white coloring. Common Puffballs also have an unusual covering of spiky warts on their surface, setting them apart from other types of puffballs.

Even though these mushrooms are considered nonpoisonous, it’s important to use caution when handling wild mushrooms. You shouldn’t eat any mushroom that hasn’t been identified by an expert because of the risk of misidentification. For example, the Common Puffball can easily be confused with immature Amanita mushrooms, which are poisonous and sometimes even deadly.

In addition, spores contained in the Common Puffball’s warts are released with handling. These spores can cause severe lung inflammation, resulting in cough, wheezing, or trouble breathing. Dogs are particularly susceptible to this symptom, so be careful not to let your pet play near Common Puffballs.


#6. Candleflame Lichen

  • Candelaria concolor
By bjoerns – iNauralist, via Wikipedia

Identifying Characteristics:

  • Single lobes of this lichen are less than 1 cm (0.4 in) wide, but they can cover enormous surface areas, including entire trees.
  • The coloring is golden yellow to yellow-green.
  • This lichen has a branch-like appearance, similar in shape to coral.

Candleflame Lichen is technically NOT a mushroom in Wyoming.

Instead, lichens are complex organisms that involve a symbiotic relationship between fungus and algae. The mutually beneficial relationship allows lichens to survive in habitats that would kill fungi and algae independently.

For example, Candleflame Lichen can be found anywhere from arid deserts to wet conifer forests. It’s one of the most widespread lichens in the world! Look for this lichen on trees, where it attaches to tree bark and slowly spreads.


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