Lobster Mushrooms

A Guide To Foraging Hypomyces lactifluorum in British Columbia

Lobster mushrooms (Hypomyces lactifluorum) are the unsung heroes of British Columbia's mushroom hunting season. They're a safe and easy choice for beginner mushroom hunters due to their distinctive texture, large size, and bright colour. 

Keep reading to learn why the unique and beautiful lobster mushroom should be on the list of every mushroom forager.

What Is A Lobster Mushroom?

Lobster mushrooms are the  result of a parasitic fungus Hypomyces lactifluorum infecting another mushroom, usually Russula brevipes.

The lobster mushroom infection covers the host in a hard red-orange shell, and completely alters its consistency, flavour, shape, and even DNA. 

By all accounts, Hypomyces lactiflourum only infects edible mushrooms, though caution is advised due to possible adverse reactions, like allergies.

Three large lobster mushrooms growing on the forest floor in british columbia, canada
large pale orange lobster mushroom

Lobster Mushroom Identification

Lobster mushrooms are relatively easy to identify because of their unique characteristics. The bright orange colour, size, and shape of lobster mushrooms are distinctive, and the texture is virtually unique.  

To identify a lobster mushroom, look for the  following:

Prime lobster mushrooms will be either bright orange or red. However, lobster mushrooms can have a white surface if they are partially infected, and old specimens can be wine-purple or pink. White lobster mushrooms are still edible, but older specimens should always be avoided.

As mentioned, lobster mushrooms are relatively easy to identify and easy to prepare. This makes them a great mushroom for beginner foragers. Read more about some other great starter mushrooms here.  

Improve your mushroom identification skills with an up-to-date guide book. Learn about the best mushroom identification books here.  

Where To Find Lobster Mushrooms

Top of a lobster mushroom growing among ferns

A lobster mushroom found under ferns, Douglas fir, and maple trees.

Where do lobster mushrooms grow?

Lobster Mushroom Habitat:

In British Columbia, lobster mushrooms can grow in diverse habitats, but are usually found under conifer trees.

Lobster mushrooms are one of the few edible mushrooms that can grow in large numbers under cedar trees

How To Find Lobster Mushrooms:

Keep a look out for Russulla brevipes, the lobster mushroom's preferred host. 

Look where the forest floor is loose enough for lobster mushrooms to push up from below. 

When searching, keep an eye out for flashes of orange in the undergrowth and spots of fine white powder.

If you find one lobster mushroom, scan around for more. Lobster mushrooms often grow in tight clusters of 2 or 3, with others growing up to 5 metres away.  

Lobster mushrooms will often appear in the same area year after year, so make a note when you find some!

Lobster Mushroom Season

An important factor for finding lobster mushrooms are altitude, weather, and seasonal conditions.

Pictures of Lobster Mushrooms

An old lobster mushroom partially buried under moss

A partially excavated lobster growing under moss in November. Just past prime.

A bright orange lobster mushroom mostly hidden under sticks

Although brightly coloured, lobster mushrooms can be hard to spot under sticks and leaves.

Lobster mushroom growing under moss

Another lobster mushroom well hidden under a thick carpet of moss.

Closeup of edible mushroom, Russula brevipes, also known as the short-stemmed russula

Short-Stemmed Russula

Russula brevipes, or the short-stemmed russula, are the most common hosts for lobster mushrooms.

A mushroom partially infected with the lobster mushroom fungus

A Partially Infected Lobster

Partial infections are relatively common, resulting in a blotchy white, yellow, or light-orange surface.

How To Harvest Lobster Mushrooms

Lobster mushrooms can grow from deep under the ground. To harvest a lobster mushroom, grab it low down at the base or gently by the cap and wiggle it until it breaks free. Once picked, cut the base off to keep your collection clean. Dust off any debris caught in the cracks or folds of the cap. Some will have to be cut away once you're at home. 

Remember that lobster mushrooms will fruit in the same area year after year (although the specific time and quantity may vary). So, if you do find some lobster mushrooms, make a note of the location so that you can return at a later date for more. 

How To Know If A Lobster Mushroom Is Poisonous

Lobster mushrooms aren't poisonous. But old or bug-eaten lobster mushrooms can make you ill, and some people have negative reactions to them. 

Lobster mushrooms that feel spongy, soft, or lighter than normal should be discarded. Also, check for soft damp spots. Discard those ones as well. 

Prime lobster mushrooms should be dense, hard, firm, and not have any bad smell about them. 

Before You Find Your First Lobster Mushroom, Read The Safe Foraging Guide.

Cleaned and processed lobster mushrooms

Growing Lobster Mushrooms 

Lobster mushrooms can grow in large quantities, and they are also delicious and easy to cook. Because of this, wild foragers will often collect lobster mushrooms to sell to grocery stores. 

So, one might begin to think...

Can lobster mushrooms be grown or cultivated? 

Many popular mushrooms are difficult to cultivate because they depend on long-standing and delicate symbiotic relationships with specific tree species. This is the same for Russula brevipes, the preferred host of the lobster mushroom infection (Hypomyces lactifluorum). Add on the complexity of reliably inducing an infection, and you can see why the cultivation of lobster mushrooms might be prohibitively difficult.  

White Powder Or "Mold" On Lobster Mushrooms

Mature lobster mushrooms will often have a ring of fine white powder around them. This powder can also be encrusted on the lower portion of the mushroom.

Many beginner foragers worry that this is a sign of mold. However, this powder is actually the spores of the lobster mushroom and poses no danger. Simply wipe them away before preparation. 

Note that if you pick lobster mushrooms and store them overnight, they will probably develop a dusting of spores by the morning. 

Patches of white powder on the ground can even be a great indicator of a hidden lobster mushroom. 

Closeup of lobster mushroom spores forming on the underside

Lobster Mushroom Look-Alikes 

There are no mushrooms that look like lobster mushrooms. The bright orange-to-red colouring and hard shell-like exterior are very distinctive and relatively unique among fungi. You might find bright red or orange mushrooms, but they won't have the hard shell. And you might find mushrooms with similar infections, making them hard on the outside, but they won't have the right colour. For example, there is a yellow-green variety of the lobster mushroom infection (see right).

Yellow-Green Lobster Mushrooms

The beautiful red lobster mushroom has a slightly less beautiful and much rarer cousin, Hypomyces luteovirens .

Hypomyces luteovirens also infects Russula and Lactarius species, but its edibility is unknown. 

Yellow-green lobster mushroom, Hypomyces luteovirens

Above: Hypomyces luteovirens

White Lobster Mushrooms

Very rarely, mushroom hunters come across the elusive white lobster mushroom. These have the hard, shell-like exterior of normal lobster mushrooms, but, they are mostly or completely white. 

White lobster mushrooms are probably some kind of mutation and are (reportedly) just as safe to eat as regular lobster mushrooms. 

A white lobster mushroom next to a red lobster mushroom

Processing and Preparing Lobster Mushrooms

Lobster mushrooms sliced up and cleaned. Ready for cooking.

Thick-cut lobster mushrooms ready for the pan (with a few chanterelles).

Lobster mushrooms cooking in a pan with butter

Frying in butter, with salt, pepper, and rosemary. Getting ready for the oven.

Pre-Preparation of Lobster Mushrooms: 

How to Cook Lobster Mushrooms:

Lobster mushrooms take longer to cook than other mushrooms, and will stay firm through the process.

To soften lobster mushrooms, consider cooking them twice. Example: frying then baking.

Simple preparation is best. Lobster mushrooms do well fried in butter until they start to brown. 

Some people have allergic or other bad reactions to lobster mushrooms, so first-timers should practice caution. 

How To Make Dye From Lobster Mushrooms

The bright exterior of lobster mushrooms can be used to make fabric dye. This is a particularly good use for the deep purple specimens that are too old to eat. You will need a dedicated dying pot that you can use outside, alum, and baking soda. 

Follow these simplified steps to dye wool using lobster mushrooms: 

Skeins of wool in a variety of colours dyed with lobster mushrooms

Lobster Mushroom vs Chanterelle

How do lobster mushrooms compare with the more famous chanterelle? Lobster mushrooms are better than chanterelles in a number of ways. Lobster mushrooms are larger, easier to cook with, and can be found in the summer when choice edible mushrooms are rare.  

Compared to chanterelles, lobster mushrooms have many advantages:

Arguably, the only advantage that chanterelles have over lobster mushrooms is a slightly better taste.  What do you think? Should lobster mushrooms get more credit as a choice edible mushroom?

If you're finding lobster mushrooms, then chanterelles are probably next. Read more about chanterelles here

Frequently Asked Questions About Lobster Mushrooms

Is the lobster mushroom edible? 

Lobster mushrooms are very edible, being one of the most prized edible mushrooms that you can find during the summer. Lobster mushrooms have a hard, almost brittle texture, and a flavour that is subtle but distinctive. They require a lot of cooking, but with a bit of butter, seasoning, and time, they're delicious. 

Do lobster mushrooms taste like lobster?

The lobster mushroom infection changes the taste and texture of the host mushroom. Some report that this change gives lobster mushrooms a lobster-like taste. Whether you experience this or not, their hard red shells and white interiors are certainly reminiscent of lobsters. 

However, the taste of lobster mushrooms is both mild and variable, so don't expect the experience to be like tucking into an actual lobster. 

Are lobster mushrooms safe to eat?

Lobster mushrooms are one of the safer edible mushrooms. The only two species that we know are infected by the lobster mushroom fungus in North America are Russula brevipes and Lactifluus (Lactarius) piperatus. Not only are both of those mushrooms edible, but the lobster mushrooms infection actually changes them completely into, well, lobster mushrooms. 

Where can I pick lobster mushrooms?

Pick lobster mushrooms from the floor of coniferous forests. They usually grow from under light or loose organic matter. 

To pick lobster mushrooms legally, in Canada: stick to land you own, private land you have permission to forage or crown land. 

How do you prepare lobster mushrooms?

To prepare lobster mushroom, first cut away the crusty surface on top. Then cut away any damp or soft parts. Slice the mushroom into strips and saute or bake for a long time in butter with light seasoning. 

How do you know if lobster mushrooms are bad?

Bad lobster mushrooms smell bad. They can also be spongy, damp, or crumbly. Very old lobster mushrooms will turn purple and pink.

How do you store fresh lobster mushrooms?

Lobster mushrooms can be stored in a paper bag in the fridge. Try to consume them within a week. 

Can you dehydrate lobster mushrooms?

Lobster mushrooms can be dehydrated. Make sure to slice them thin so they dry thoroughly and consistently. Store them in a freezer, but not for too long. 

Could lobster mushrooms be poisonous?

Lobster mushrooms aren't poisonous. Hypomyces lactifluorum only infects edible mushrooms, and even if it didn't, it changes its host completely, right down to the DNA. Care should still be taken when consuming lobster mushrooms due to other possible negative reactions, like allergies.

Is there a lobster mushroom poisonous look alike?

There are no mushrooms that look like lobster mushrooms. As such, there are no poisonous lookalikes for lobster mushrooms. If you simply pay attention to the primary identifying characteristics, and discard anything you're uncertain about, you will be unlikely to pick anything else than a real lobster mushroom. However, as always, getting outside confirmation from multiple sources is always recommended. 

Summary: Foraging Lobster Mushrooms

Lobster mushrooms are safe

Lobster mushrooms are a safe choice for foraging. They are relatively easy to identify and only infect edible fungi species. However, as with all mushrooms, cook them thoroughly before eating, avoid old or rotten specimens, and only eat a small amount the first time. 

How to identify lobster mushrooms

Lobster mushrooms are easy to identify. They have the following identifying features:

Lobster mushroom season

Lobster mushrooms grow from mid-to-late summer on Vancouver Island. Heavy rainfall can result in a large fruiting of lobster mushrooms roughly a week later.

Lobster mushroom habitat

Lobster mushrooms grow mostly in conifer forests. They can be found under cedars and Douglas firs, growing from under loose forest floor material, and usually wherever Russual brevipes are found.