The Amateur Mycologist #7 - Amanita bisporigera - "The Destroying Angel"
The deadliest mushroom in North America.
The "Destroying Angel" is a nickname well earned. The positive half of its nickname comes from its pure white color and beautiful, classic mushroom structure.
But, Amanita bisporigera is truly an angel of destruction. When people talk about their fear of mushrooms - indeed when I insist you do not eat what you find - it is with this mushroom, and others like it, in mind.
Let's be clear about this:
If you eat an Amanita bisporigera you will likely die.
Even eating a small amount can potentially kill you, or leave you without a working liver. It is a truly deadly and frightful mushroom, and one of a select few which define my own mushroom hunting parameters. It is also fairly rare, and I have never encountered one - so the photos will be wikicommons with sources at the bottom.
Let's dive in.
The Destroying Angel is positively rife with mycotoxins. The primary type of mycotoxin is a group called amatoxins, of which this mushroom can contain up to three: beta-Amanitin,alpha-Amanitin, and gamma-Amanitin. None of these are good for you, but alpha-Amanitin is the biggest problem. It is easily absorbed by your body, it takes only .1 milligrams for every kilogram of body weight to kill you, and each mushroom contains 10-12 milligrams, so it's pretty easy to get a deadly dose.
![](https://steemitimages.com/DQmW6Kt62crpMXhySNrkkA9YwWBdLCGBHS2vNnLyqpoRvUj/image.png)
The way alpha-Amanitin works is particularly insidious. It stops your cells from being able to transcribe DNA. This may not sound like a big deal to some, but your body is transcribing DNA all the time. Your body is in a constant state of making new cells, it's what keeps us all alive. Alpha-Amanitin prevents your body from copying your DNA into your new cells, which means your body can't make any new cells.
The result is a terrifying break down of your bodily functions, but not all at once. The toxin acts in clear stages:
- The Incubation stage: This stage has no symptoms and lasts from 6 to 12 hours after eating the mushroom.
- The Gastrointestinal stage: This starts about 6 - 16 hours after you eat the mushroom. You get terrible stomach pain, vomit everywhere and have diarrhea for as long as 24 hours. Then, things calm down, and you feel better - almost like nothing happened, for anywhere from 24 to 48 hours.
- The Cytotoxic stage: This is where the mushroom truly begins to kill you. Your cells are dying, as they always are, but your body is not able to replace them because the toxin prevents you from transcribing DNA. This primarily effects your liver, where cell death and replacement occurs very quickly. Over 24 to 48 hours your liver will slowly die and, depending on how much you ate and how quickly you got appropriate treatment, eventually stop working altogether. Once your liver goes, your kidneys follow and, if left untreated, you usually die at this point. If treated, many usually die anyway - or require liver transplants. For a harrowing tale of one survivor, take a look at this.
The toxin is virulent and if you believe you have eaten this mushroom you should go to the emergency room immediately. Ideally you should bring a piece of the mushroom with you for identification purposes.
That's the bad news.
The good news is that this mushroom won't hunt you down and find you. It isn't poisonous to touch, or smell, or even to chew up and spit out (ALTHOUGH OBVIOUSLY DO NOT DO THIS). In order for this mushroom to kill you, you've got to eat it. So let's go over some details.
This picture right above tells us a few things about the mushroom, its habitat and its development cycle. To begin with, the mushroom is a nearly pure white color. Like most Amanita species, it begins life in a round, solid egg or button. This is referred to as the "volva".
I wanted to get a picture of the volva before it hatched, I think it is important to see, but there are no public domain images. However, if you look at the young specimen above, you can see the remains of the egg - the volva - at the base of the stem. All Destroying Angels will have this volva at their base. However, sometimes the volva can be destroyed or obscured by dirt and may not be obvious
To see a destroying angel egg, click this link to a google search and check out the images.
Destroying Angels are Agaricales, or gilled mushrooms, which can grow on the floors of most North American forests. Like the Lactarius Indigo last time, the Destroying Angel is mycorrhizal and grows in a mutually symbiotic relationship with nearby trees. The Mushrooms are usually found in summer or early fall, and will usually grow by oaks, except in western North America where they could be found near birch or aspens.
The spore print will be white - but this is the case with most Amanita species. As is the presence of a "universal veil" or veil remnant. In a young specimen, the veil will still be intact as a white covering connecting the stem to the cap edge and fully covering the gills.
If you scroll back up to the top picture, you can see the remnant of the veil hanging down from the middle of the stem fairly prominently. This is another tell tale sign of a Destroying Angel - but is also a sign of many other Amanita species, as well as other mushrooms.
In fact, there are a number of characteristics the Destroying Angel shares with other Amanita and non-Amanita mushroom species, several of them edible. This can easily lead to confusion. Aside from telling you to never eat your finds, I abide by a separate rule.
If a mushroom has any of the major characteristics of a Destroying Angel - or indeed of any Amanita - there is no chance I will ever eat it.
Some mushroom lovers will call this a draconian response. That's their prerogative. As far as I'm concerned, if any gilled mushroom, growing on the ground, shares any primary feature of an Amanita - a volva, a veil remnant, white or yellow color, non-attached, close packed gills, white spore print - I will not eat it.
That doesn't mean I won't try to identify it! The identifying process is as rewarding, if not more so, when the mushroom is rare or dangerous! I just won't ever - ever - think of ingesting anything that looks even a little like this killer, and neither should you.
Macroscopic Features:
Cap = 1.2 - 3.9 in diameter (3-10 cm) - starts egg shaped, becomes convex, matures to almost flat. Smooth, white, sticky sometimes in wet weather.
Gills = Free or just slightly attached. White and crowded. Lots of short gills not making it to the stem - called lamellulae. Covered by universal veil in young specimens.
Flesh = Thin and white, does not change color if you bruise it. (some mushrooms do).
Stem ("stipe") = white - 2.4-5.5 in by .3-.7in(6-14cm by .7 - 1.8cm), solid, tapers toward the top - sometime the surface will be covered in either a soft hairlike substance, small thin fibers, or tiny scales - less when matured. At the base there will usually be the remains of the volva and near the top/middle of mature specimens the remains of the universal veil hanging down.
Spore Print = White
Ecology ("What it grows on") = Mycorrhizal, found in forests - often near Oaks, except possibly other trees in the northwestern US
Distribution = North America, as far south sometimes as Colombia.
Edibility = DEADLY POISONOUS We don't eat any of our finds, but WE ESPECIALLY DON'T EAT ANYTHING THAT LOOKS ANYTHING LIKE THIS
Other Traits = Starts as an all white egg, a volva, sometimes buried in the dirt. In this stage, it can be mistaken for a puffball. Bifurcating the egg will help to distinguish, as Amanita's will have immature gills inside, while puffballs will be uniform white flesh.
Have a Mushroom you want help identifying? - leave a message on the Steemit Mycology discord channel.
https://discord.gg/7kdVa
For The Online Mycokey program look Here
For A Crash Course On How To Identify A Mushroom Read The Amatuer Mycologist #3
For a Glossary Of Relevant Mycological Terms, Micheal Kuo's Website Provides
Picture Sources
[1]By Dan Molter (shroomydan) (Amanita bisporigera G. F. Atk. (17932)) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
[2]By Dan Molter (shroomydan) (Amanita bisporigera G. F. Atk. (55047)) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
[3]By Edgar181 (Own work) [Public domain], via Wikimedia Commons
[4]By This image was created by user Britt Bunyard (Fungi magazine) (bbunyard) at Mushroom Observer, a source for mycological images. You can contact this user here. [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
[5]By This image was created by user Dan Molter (shroomydan) at Mushroom Observer, a source for mycological images. You can contact this user here. [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
Information Sources
https://en.wikipedia.org/wiki/Amanita_bisporigera
https://en.wikipedia.org/wiki/Agaricales
http://www.mushroomexpert.com/amanita_bisporigera.html
A firesale of OC
There's my pop-sci blog, soon to be dealing with the conundrum of light's speed.
Piqued #2 - A Crash Course In Space Time
Piqued #3 - A Crash Course Towards The Speed Of Light
Piqued #4 - Enter The Wormhole - A Crash Course
[Piqued #5 - All About Warp Speed](Hey! Checkout blog post on Steem https://steemit.com/science/@dber/piqued-5-an-idiot-s-guide-to-warp-drives)
Piqued #6 - Future Insterstellar Spaceships - The Bussard Ramjet
Then there's my series about the exploration of wild mushrooms - most recently an interactive workshop to teach readers how to identify mushrooms themselves
The Amatuer Mycologist #3
The Amatuer Mycologist #5 - Lycoperdon perlatum - The Common Puffball
The Amateur Mycologist #6 - Lactarius Indigo - The Indigo Milk Cap
I recall learning about this one in my Botany class. So innocuous looking as well.
Right? It just looks like your proto-typical mushroom - like out of a story book or something. Wolf in sheep's clothing.
"or even to chew up and spit out (ALTHOUGH OBVIOUSLY DO NOT DO THIS)"
I don't see why not
In reality - you can absolutely do that safely. In fact, the taste of even this, the deadliest mushroom in America, is one of the macro characteristics which can be considered to confirm an identification.
Needless to say however, liability positively drips from that assertion. Hence my strongly worded warning.
You'd have to be the boldest mycologist in the world to taste a mushroom for confirmation that it is the destroying angel. Anybody that bold is unlikely to live to old age.
I would certainly feel uncomfortable doing it - and worry for the next few days - but I'm a hypochondriac. The truth remains though - a nibble and a spit, without swallowing anything, technically isn't dangerous.
This is a truly scary thing! But it's great to know about so people stay FAR away from it. Thank you for the information.
I'm glad so many people have shown interest - my positions tend to be very conservative when it comes to safety - which is how I operate as well.
Oh crap I saw the title, and got excited. Bought and ate a bunch from the Chinese import store as I read this. oooops.
But while I'm still alive, I love all the detail, good work =D
The local import store selling Destroying Angel in bulk since 1985. It's a fairly unique business model but it works for them I guess.
Wild stuff! Excited to learn as much as I can about the world of fungi. Until I really feel confident in my identification, I think I'll stick with morels and chicken of the woods. Mycellium seems to have many similarities to blockchain and it acts in a very collaborative way like Steemit! :)
As far as collaboration goes, we'd be hard pressed to match the efficiency of mycelium.:)
It's always a good idea to stick to the species you feel comfortable with. Most people who forage regularly will unknowingly skip over edibles because they know only a couple that are for sure safe. That happened in Russia when we went hunting - only eyes for chanties and edulis.
Nature is the greatest teacher and inspiration. I agree the mycelium efficiency is likely unbeatable. Just like the photosynthesis power of plants will never be rivaled by our measly solar panels. :)
As far as foraging, I definitely look forward to going on more educational plant hikes and learning as much as possible. Just taking the first steps towards foraging is so empowering though!
it's funny, it looks edible!
Indeed, not only does it look edible in a general sense, it also looks dangerously close to a common mushroom in parts of Asia, a variation on a "Straw Mushroom", with tragic outcomes
Nice article!
Growing up in Denmark near the woods, we were always warned about this one, due to it's somewhat similar appearance to some field mushrooms. Pretty easy to distinguish, once you've seen a few... interestingly, a cousin of the Fly Agaric which a lot of people (including my Viking ancestors) sought out for its hallucinogenic qualities... kind of toxic, too... but not like white one.
Same Genus, different species - the Amanita muscaria = Fly Agaric. I will definitely be doing a standalone post on that.
But, as long as we're on the topic - it wasn't only human's who sought out the high - but reindeers as well. And then - after the reindeers were done tripping, they would pee out a substantial amount of the active psychotropic ingredient, which survives in urine, and people would drink that reindeer urine to get high themselves.
For my money, the description of the Fly Agaric high leaves something to be desired though...
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Thank you very much! The only thing I would request changing in the science-trail newsletter is the reference to me as "mycologist" to "amateur mycologist" - as much as I wish I could claim the former title, I have neither the formal education nor the extensive experience to warrant it.