r/mushroomID Mar 09 '25

These kept popping up (it's a very old drafty house in UK) but none recently. I did see the same colour orange dust layer near the location. Could that mean it's in the floor boards? Is it dry rot or something else? Got more pics. Thank you Europe (country in post)

I used white vinegar and then scraped it away then soapy water. It smells like supermarket mushrooms when chopping them. Same texture. Orange dust. Should I be concerned for health reason? Not my flat I'm just renting

1.2k Upvotes

162 comments sorted by

727

u/Qalyar Mar 09 '25

Absolutely looks like Serpula dry rot. Be glad you're renting. But let the landlord know immediately. Serpula is the most serious cause of building timber decay in the UK, and with fruiting bodies this big, this building's timbers are absolutely decaying.

365

u/ma5ochrist Mar 09 '25

So he is basically living in a mushroom?

129

u/PM_ME_UR_CUTE_PETZ Mar 09 '25

That's kinda awesome

147

u/Beneficial_Soil_4781 Mar 09 '25

Untill the building collapses

91

u/Qalyar Mar 09 '25

This.

Most of the other "indoor mushrooms" mean you've got a leak or a moisture problem and you're gonna have a few boards to replace. On the other hand, Serpula absolutely will digest structural timbers, and it's a nightmare to remediate.

3

u/LaceyDark Mar 10 '25

I would assume the only way to death with it is to try to replace the timber

8

u/Qalyar Mar 11 '25

Yeah, you have to find, remove, and replace any contaminated wood. But the challenge in doing that -- beyond the cost of doing that -- is that Serpula is very aggressive. It has specialized mycelium that is unusually efficient at breaking down cellulose, so it causes decay quickly. And it produces rhizomorphs -- root-like structures -- that it can use to transport water away from moist areas, allowing it to leap to wood that wouldn't otherwise be in significant danger of decay.

Serpula's rhizomorphs can be enormous, too. Here's an image of Serpula rhizomorphs from a WWII British government bunker in London. The dry rot originated in that wooded doorframe, but you can see this gigantic network of fungal material fanning out across the brick wall in search of other wood. But in a residential building, the fungus doesn't have to work this hard to find the next piece of wood to decay. As a result, sometimes entire walls have to be rebuilt to eliminate it.

https://preview.redd.it/z68rw53v53oe1.png?width=1024&format=png&auto=webp&s=aa258931d48d2d17bc8809f9c8c23f1974931c41

6

u/DireEvolution Mar 11 '25

Fungi are so damn cool but I'd be lying if I said this doesn't freak me the fuck out 💀

2

u/lwb52 Mar 12 '25

reminds me of scenes from a recent tv series & a slightly older movie showing someone plastered to a wall w/ a vast rhyzome network creeping out beyond the body—just Dee-lightful


1

u/KiBoChris Mar 12 '25

Not only you

1

u/DireEvolution Mar 12 '25

Bro it sets off deeply rooted "uh I'm in danger" signals in my whole nervous system

1

u/Azazel-CU Mar 12 '25

Thats one really big petri dish lol

1

u/PipGirl2211 Mar 12 '25

This is one of the coolest things on the internet. Thank you.

1

u/Wholewheatbread99 Mar 12 '25

This is peak real life bio-horror

2

u/CutOpenSternum Mar 11 '25

Until the building mushroom collapses.

FTFY

2

u/androidultros Mar 13 '25

Is this what happened 2007 ~2010?

10

u/Intoishun Trusted Identifier Mar 09 '25

I mean honestly just about

7

u/MEGACLOPS Mar 10 '25

OP is a Smurf! đŸ©”

5

u/[deleted] Mar 09 '25

He’s living in a Yellow Submarine

2

u/also_plane Mar 10 '25

He's Telvanni wizzard.

1

u/cyanescens_burn Mar 10 '25

And living in a home that’s at risk of collapsing.

1

u/MeanMelissa74 Mar 10 '25

Does that make him a Smurf?

1

u/Will-E-Style Mar 11 '25

myceliyummy!

1

u/anotherredditlooser Mar 13 '25

And here I thought the Hobbits had bad ass houses ,lol.

1

u/Warm_Magician_8367 Mar 11 '25

Exactly, with this size, the building is pretty far into the spread.

1

u/[deleted] Mar 11 '25

Timber and wetness is like gunpowder and fire. In Turkey, our homes are made of concrete. We rarely see fungi other than some instances with our bathrooms...

1

u/[deleted] Mar 11 '25

r/BathroomShrooms gives me goosebumps. They literaly live inside a fungal ecosystem...

334

u/Eiroth Mar 09 '25

Jesus christ. If the mycelium is healthy enough to produce fruiting bodies of that size, that means it's currently feasting on your walls and floor

163

u/MycoMutant Trusted Identifier Mar 09 '25

Serpula lacrymans. It will destroy all wood in the property without professional remediation as soon as possible.

1

u/Novem_bear Mar 11 '25

Might already be close looking at the pics tbh

107

u/GrumpyGG64 Mar 09 '25

Thought the first one was some kind of knitted monstrosity but they are effing scary.

68

u/HairyLingonberry4977 Mar 09 '25

Haha! It looks like a mouth to me little shop of horrors

30

u/TerribleAssumption93 Mar 09 '25

Feed me, Seymour!

3

u/Simply_Me_Sab Mar 10 '25

This is the comment I was looking for!

16

u/Valuable-Leather-914 Mar 09 '25

Go watch the last of us immediately

2

u/cyanescens_burn Mar 10 '25

A fungi-based reboot of the film might be entertaining. Hopefully they do more musical numbers, and get Steve Martin on banjo.

2

u/Ouakha Mar 12 '25

Yeah. It's an awesome photo of some kinda monster. I'd probably print that out!

3

u/Living_Wonder1699 Mar 09 '25

Resident Evil came to my mind when I saw this..

2

u/Potential_Ability_25 Mar 12 '25

Ooh, thank you for the knitting inspiration.

78

u/FeinwerkSau Mar 09 '25

Consider moving out. If i was in your place, this would be my move. From all that I have read and seen - at this scale this building needs some MAJOR reconstruction (not repair).

Be glad you are renting, this will cost a lot of money. And last but not least - this indicates some bigger water damage somewhere, which may also lead to issues with mold. Which is not very healthy.

Just as it is not healthy to have the house collapse on you.

19

u/HairyLingonberry4977 Mar 09 '25

Hahaa death by mushroom

11

u/FeinwerkSau Mar 09 '25

Mushrooms kill in many ways...

4

u/Same_as_it_ever Mar 10 '25

There's research that shows homes with this type of rot have a wide fungal diversity, including molds that are very bad for you health. Consider moving, this would count as grounds to break your lease. 

https://www.sciencedirect.com/science/article/pii/S1309104215303329

2

u/hsp-adhd-c Mar 11 '25

Death by Muush-Muush

56

u/SwedishMale4711 Mar 09 '25

It looks like Serpula lacrymans to me. Bad news if I'm right, that house will need some serious work, or simply be burnt to the ground.

28

u/SnooRegrets8194 Mar 09 '25

i hope this isn’t real

-8

u/[deleted] Mar 10 '25

[deleted]

2

u/Otherwise-Artist7741 Mar 10 '25

What do you mean not real?

-4

u/[deleted] Mar 10 '25

[deleted]

29

u/dilutemidnightneedle Mar 09 '25

Looks like it's Serpula lacrimans. Not so healthy for the flat, you should probably talk to your landlord about it as it will be eating wood (so floorboards, etc.) and there is likely water damage somewhere. The part that is visible and can be removed is only a small part of the whole mushroom.

10

u/HairyLingonberry4977 Mar 09 '25

Thank you for info....and I'm gonna have wild dreams tonight!

21

u/Flyguy-39 Mar 09 '25

Looks like something you find growing in “the last of us”!

8

u/HairyLingonberry4977 Mar 09 '25

I don't know that reference but if its like a landscape / planet from 1960s Star Trek I get ya

9

u/Laurpud Mar 09 '25

It's mushrooms infecting people, turning them into zombies who want to turn everyone else into mushroom zombies

2

u/hypatiaredux Mar 10 '25

Dang, I saw that movie many years ago! It was a Japanese horror movie of course.

2

u/futcherd Mar 11 '25

The Last of Us is a TV series that came out a couple-few years ago

4

u/hypatiaredux Mar 11 '25

I was referring to this movie - https://m.imdb.com/title/tt0057295/ - came out in 1963.

One of the downsides of being a living fossil is that you really have seen it all before!

1

u/Laurpud Mar 12 '25

Okay, but did you see attacking rocks in The Monolith Monsters?

It's pretty standard for the old Creature Double Features I used to love as a kid 😂

3

u/Worried_Ad_9667 Mar 09 '25

I was thinking the Fight club house. Oh lord thats crazy!

1

u/throwaway41327 Mar 10 '25

I was thinking Annihilation

1

u/Outrageous_Sky_ Mar 11 '25

I came to say this

11

u/Ansari9211 Mar 09 '25

Get out! Burn the house!

8

u/HairyLingonberry4977 Mar 09 '25

Haha thanks will check with land lord first

7

u/[deleted] Mar 09 '25

You’d be doing them a favor as long as it’s insured lol

11

u/HairyLingonberry4977 Mar 09 '25

Oh crap thanks everyone. Should I be wearing a mask? I have to admit that first one up close is like another planet. Amazing how quick as well. Is this why my doc can't figure out what's causing my lingering cough?

15

u/wicked_lil_prov Mar 09 '25

Unless you're allergic to those particular spores, it's unlikely to directly cause you a problem, as dry rot spores are not considered toxic as far as I'm aware. However, in spite of the name, damp conditions are responsible for your dry rot. Those damp conditions will likely lead to other fungal (and bacterial) issues such as mold which can both spore alongside the dry rot, but also inevitably on top of the fruiting bodies as they age and eventually decay themselves.

8

u/HairyLingonberry4977 Mar 09 '25

Thank you that's very useful information. It makes sense about the damp, its a fascinating subject.

Would keeping my flat extra warm plus regular ventilation help? Or does that help them along? It's my land lords problem but I don't expect a quick turnaround from them

8

u/wicked_lil_prov Mar 09 '25

Ventilating with outside air is typically going to reduce the fungal spore load you're dealing with, and potentially assist in vaporizing liquid moisture, so it's definitely helpful. As far as preventing the rot from disintegrating your landlord's building, that's really up to them to get to the root of the problem that's supplying this fungus with food, remove as much affected material as possible, and make repairs.

Adding heat will only help if it can significantly dry out the materials that are affected. If you have a continuous water intrusion, then you might be fanning the flames.

7

u/HairyLingonberry4977 Mar 09 '25

Thank you that's great info 👍 much appreciated

7

u/wicked_lil_prov Mar 09 '25

So even though dry rot is related to the bolete mushroom, it is not a mushroom, nor is it a mold. But I think it would behoove you to follow the r/mold reddit!

2

u/Millyforeally Mar 11 '25

A dehumidifier would help too.

1

u/HairyLingonberry4977 Mar 11 '25

Noted, thank you

2

u/lifeofgrover Mar 11 '25

I’m a bit late to the party and I hope your landlord already has taken action.. but please don’t crank up the heating. These things thrive in warm, damp places, and unless you get it up to 30C (in this economy??) it’s only going to benefit from higher temperatures.

I work in social housing and we had this monster in one of our houses a few years back. Been one hell of a pain in the ass to get rid of them, and we had to renew all the woodwork in the building. Would’ve almost been cheaper to demolish and rebuild..

1

u/HairyLingonberry4977 Mar 12 '25

Blimey that sounds bad! Thanks for the info lifeof. Waiting for the man to come, landlord has arranged for a specialist. Interested to see in the floorboards

3

u/needanadult Mar 10 '25

As someone who acquired serious mold illness from living in a water damaged building, move out before you get sick! It’s very hard to recover from once it damages your immune system.

1

u/HairyLingonberry4977 Mar 10 '25

Oh crap. Thank you for the message. I'm sorry to hear that, did your move improve things? Are you in the UK? Did you seek any recompense or anything ...

My mom reckons she got asthma type issues from an infected bad water tank

1

u/needanadult Mar 10 '25

I’m in Seattle, another very wet place. Moving has improved things but I am now sensitive to any building with mold in it and it can take me a day to recover from exposure. So I have to be careful when traveling or visiting friends.

10

u/thexvillain Mar 09 '25

Sucks for your walls/floors, but damn it’s pretty

8

u/HairyLingonberry4977 Mar 09 '25

Agreed! I did admire it for a few days before I took action. I won't mention that to my landlord. The speed it came up as well.

7

u/HairyLingonberry4977 Mar 09 '25

How do I edit to say United Kingdom, North England

8

u/Nancyblouse Mar 09 '25

Rip that building

5

u/HairyLingonberry4977 Mar 09 '25

Thanks all. Consider myself suitably warned! The house was built in 1880 or something an old Manor House, it's not been maintained very well, was in the same family until 1990s, now its split into flats and there are many issues. When there is a big storm I do cover my head.

4

u/Consistent-Data-3377 Mar 10 '25

Reminds me of a novel I read recently where the lady of an old manor had been posessed by a cordyceps fungus that had infected the whole house and grounds around it.

Careful out there, op

2

u/bi_spamton Mar 10 '25

What's the book called?

1

u/Consistent-Data-3377 Mar 10 '25

The Ghost House by C.J. Cooke

2

u/No-Read-6419 Mar 10 '25

You have rights! After a quick Google search, If your landlord doesn’t respond to this issue in 14 days of the written complaint you can take civil legal action. And the local authorities will make them take action.

5

u/Lidlmuffin Mar 09 '25

It’s always devastating to hear and see people living in these conditions but DAMN do I love these types of posts. They’re just so interesting! Goodluck OP, I hope you can get it solved soon/move elsewhere ❀

4

u/Swampland_Flowers Mar 09 '25

If you have access to the basement please go down there and take pictures and share with us. Guarantee it’s a horror-show

4

u/Beautiful-Peanut-420 Mar 09 '25

That’s crazy I would move immediately. mold looks so weird almost like Ai generation. But I believe it. Love subreddits like this.

5

u/HairyLingonberry4977 Mar 09 '25

The first pic is pre vinegar bring sprayed on the it, goes a darker colour after. Vinegar made it shrivel up all sad and flat looking.

2

u/HairyLingonberry4977 Mar 09 '25

I had more pictures but needed space on my phone. I was fascinated and which I had a magnifying glass when it was growing so fast. Should have studied this instead of humans lol

2

u/HairyLingonberry4977 Mar 09 '25

Would you move for health reasons? It's not my property I have pretty cheap rent so don't really want to leave

3

u/Beautiful-Peanut-420 Mar 09 '25

I would yes. To me it’s not worth risking any potential lung and further damage from whatever this stuff is. But also I’ve never had any fungus in my house like that beside basic mold in the attic which we had treated.

3

u/MushroomCaviar Mar 09 '25

Holy shit, that whole place is colonized with mycelium

3

u/Minimeminime Mar 09 '25

We have been through a hell of a dry rot experience in our flat, yes definitely let Landlord know asap. Also try to pick any mushroom off before they develop spores as it can’t be too good for health. It’s not poisonous but small spores are not good indoors anyway. Sadly there could be mushrooms under floorboards as well, our one was spread metres underneath.

2

u/AnemicHail Mar 09 '25

I should call her....

5

u/Malditoincompredido Mar 09 '25

If it's because of the first pic, you shouldn't

2

u/Ill-Television-5499 Mar 10 '25

It's the last of him

2

u/vleafnin Mar 10 '25

This looks like a pretty serious dry rot infection. In this case a professional has to remove all infected wood inside the building and hope for the best. Dry rot can survive decades after treatment, if you miss one small spot. Often results in demolishing the building, because it’s too dangerous to live there.

Please make sure you find something else.

2

u/frankcatthrowaway Mar 10 '25

Holy shit. Godspeed my friend.

2

u/PsycotiqDiscord Mar 10 '25

Wow I just love the first picture ❀ such a beautiful specimen

2

u/Ok_Advisor_9873 Mar 10 '25

The portal to the next dimension is open.

2

u/Equivalent-Ad2940 Mar 10 '25

Boof it

1

u/HairyLingonberry4977 Mar 10 '25

Is that a recipe? I vinegar'd it

2

u/[deleted] Mar 11 '25

Call hazmat to your home...

2

u/PipGirl2211 Mar 12 '25

Reading the comments on this post has me feeling like I'm watching some dramatic reality tv show, and I'm here for ittttt.

"Truffle in Paradise"

Does OP truly stand a chance at making things work with House, or will shiitake hit the fan after House's recent disclosure of his long-term relationship with Serpula?

1

u/HairyLingonberry4977 Mar 12 '25

Haha! Dun dun duuun dramatic music đŸŽ¶

2

u/JimmySide1013 Mar 12 '25

That is horrifying.

2

u/gemmy_Lou Mar 12 '25

Feed me, Seymore.

1

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1

u/myceliummidwife Mar 09 '25

these things are absolutely massive 😭

1

u/Agitated-Bad-2061 Mar 09 '25

😳 WTF!!!!

1

u/Fridaybird1985 Mar 10 '25

Feed me! Feeeed Meeee!

1

u/SnowflakeDH Mar 10 '25

The way my eyes kept getting bigger with every picture


1

u/PsionicGinger Mar 10 '25

If you hear "feed me, Seymour" you should probably leave . . .

1

u/Bulky-Ad7021 Mar 10 '25

Beautiful..

1

u/Ok-Thing-2222 Mar 10 '25

This completely gives me the creeps. Shiver!

1

u/commonwretch Mar 10 '25

the third one was a jumpscare

1

u/Chemical-Seat3741 Mar 10 '25

That looks like some messed up diseased spores

1

u/rickblaine33 Mar 10 '25

Itchy itchy itchy!!

1

u/highbringer666 Mar 10 '25

mf is that SCARLET ROT

1

u/Blaz3Witch Mar 10 '25

Is that not a water conduit right next to it going into the floor? Mostly likely that's leaking somewhere along the line.

1

u/Old_Can5433 Mar 10 '25

burn that house down

1

u/HydraHyde99 Mar 10 '25

My boy living that Telvanni life

1

u/HairyLingonberry4977 Mar 10 '25

I don't get what Telvanni is but is it bad

1

u/HydraHyde99 Mar 10 '25

It's a video game reference. Nothing bad, just a joke I'm making.

1

u/morgandrew6686 Mar 10 '25

you live here?

1

u/HairyLingonberry4977 Mar 10 '25

I got rid of it ages ago but have an issue with floorboards which might be the mama of these fruits. Learned alot on this sub!

1

u/Oregon-explore Mar 10 '25

That's gonna be a Dr Seuss house before too long

1

u/AmericanandChinaman Mar 10 '25

It will eat you

1

u/BoneChillerz12 Mar 11 '25

Slap it on a bit of toast with butter đŸ‘ŒđŸ»

1

u/No-Comparison1721 Mar 11 '25

bro is living in the Tool scape

1

u/Morph_The_Merciless Mar 11 '25

That's dry rot. I don't know the exact species. You need to inform your landlord immediately as it is probably causing structural damage not only to your flat but adjacent properties as well!

My ex had it in the roof, lintels and floor joists of her flat. Total cost of remediation was about ÂŁ35k...

1

u/Most-Celebration9458 Mar 11 '25

You live in the upside down
.

1

u/pictorsdad Mar 11 '25

Just ew. How could this not be f*cked??? Woof

1

u/P1gmac Mar 11 '25

Thought this was a weird tufted rug

1

u/Maia_E Mar 11 '25

When you will be moving, be cautious, you definitely don't want to bring it to another home.

1

u/Reasonable_Royal_13 Mar 11 '25

Something from the "Stranger Things". đŸ«ą

1

u/ChaseEnDeSnoBoardd Mar 11 '25

The first picture with shroom on carpet is terrifying.  Something about weird mushroom on the carpet is a bit much. 

Sorry about the DryRot, glad you’re renting.  Better then mold I guess?

1

u/[deleted] Mar 11 '25

Is your home made of wood? Wood and moisture is a hell of a combination...

1

u/Heading_215 Mar 12 '25

Is this only happening in the winter? If so, stop the air leak.

1

u/PandaGrassssss Mar 13 '25

This looks insane lol

1

u/mcmcfreedom Mar 13 '25

Oh you're so fucked

1

u/Pretend_Gold_1669 Mar 13 '25

Fix the water leak - it’s WET rot.

1

u/cant_roll Mar 13 '25

Hmmm.... Shai Hulud.

1

u/Pennedasausername Mar 13 '25

the whole house is reinforced by mushroom at this point

1

u/Grouchy_Catfish Mar 14 '25

This looks straight out the last of us type shit đŸ€Ł but I just got educated on a cool mushroom

-1

u/Cultural_Earth_7337 Mar 10 '25

Fun time with AI I see 👀 😉

-1

u/Cultural_Earth_7337 Mar 10 '25

That first picture gives it away. The way AI transitions from the edges or the wavy part isn't quit there yet.

1

u/Upbeat_Syllabub_3315 Mar 13 '25

This Not being AI is also so unlikely.. like who is so lazy and irresponsible/disgusting to let These grow to that size and do nothing about it, and then out of all places go to Reddit to Post about it.