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Mushrooms, Mycology and Psychedelics > Mushroom Hunting and Identification
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Amanita Muscaria var. formosa, versus Amanita Frostiana
    #2932904 -

Recently I have found a nice fairy ring of Amanita mushrooms, most of which seem to be Aminita Muscaria var. formosa. Most of the shrooms are orange-yellow, light yellow, or faded white-yellow.

To identify these mushrooms I have been using a book that I bought at my school's bookstore entitled "Mushrooms of Ontario and Eastern Canada" by George Barron. This is an excellent guide book, but I am having one problem. I have picked 8 mushrooms, and out of the 8 i can definately identify one as being Amanita Muscaria var. formosa, due to the double ring at the stem base. One of the mushrooms look very similar to Amanita frostiana, and the other 6 are closer to muscaria var. formosa, but are difficult to tell. Is there a definate way to differentiate a frostina from a muscaria var. formosa? Do these two shrooms usually grow close to each other? I want to make sure that I am not drying and ingesting frostiana.

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Re: Amanita Muscaria var. formosa, versus Amanita Frostiana [Re: Darcho]
    #2933367 -

There are a lot of Amanita species similar in appearance to Amanita muscaria var. formosa. Accurate identification of these mushrooms generally requires a microscope and chemical reagents.

According to the current authority on North American Amanitas (Rod Tulloss), the correct name for this species is Amanita muscaria var. guessowii.

Some similar species are A. frostiana, A. flavoconia, and various members of the complex of species similar to A. pantherina such as A. albocreata. Note under each description the other species listed as similar.

If you read those descriptions and find yourself confused about which species you have in your hand, good. These mushrooms are difficult to identify accurately.

Happy mushrooming!

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Re: Amanita Muscaria var. formosa, versus Amanita Frostiana [Re: ToxicMan]
    #2933411 -

Thanks for the links, although I have already checked out most of them.

I need to know this:

Amanita frostiana have yellow warts present on the cap, and the cap (accordign to my guide) is 2-8cm across. Can the warts be a whitish yellow or must they be a distinctive yellow? As well, can the caps excede a width of 8cm?

The shroom in question, that has me inquiring, has a 9cm cap across, yellowish-white warts on the cap, and the stem is shaggy half of the way up.

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Re: Amanita Muscaria var. formosa, versus Amanita Frostiana [Re: Darcho]
    #2933434 -

Sunlight tends to fade the colors of most mushrooms, so I would say it's likely that a yellow warted mushroom could end up with white warts. Yellowish warts should probably be considered yellow for most identification purposes. I regularly find yellow warted Amanitas here in Colorado whose warts have faded to pure white.

Cap sizes are generally given for the range in several collections. But I have collected lots of mushrooms and had them identified by professional (PhD) mycologists where the cap size was significantly outside the normally stated range. So, a 9 cm cap would not necessarily exclude the species.

The two things that would help the most would probably be testing the spores to see if they are amyloid, and measuring the spore size. With a heavy deposit of spores from a spore print they could be tested for amyloid without a microscope, but a microscope is definitely required to measure their size.

Happy mushrooming!

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Re: Amanita Muscaria var. formosa, versus Amanita Frostiana [Re: ToxicMan]
    #2933442 -

Thanks again.

One more question for now:

Is it possible for the warts to fade and the cap not to fade? On this particular mushroom in question, the cap still has a bright orange and yellow color to it, it has not faded at all.

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Re: Amanita Muscaria var. formosa, versus Amanita Frostiana [Re: Darcho]
    #2933529 -

On Amanita muscaria subsp flavivolvata specimens, the warts fade much faster than the cap does. So it is common to find specimens where the warts have faded and the cap has not yet done so significantly. I wouldn't be at all surprised to find that other Amanita species do the same thing.

Happy mushrooming!

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Re: Amanita Muscaria var. formosa, versus Amanita Frostiana [Re: ToxicMan]
    #2935468 -

Hey, sorry if this is a ridiculous question but....
what does the var. in Amanita muscaria var. guessowii.
stand for, and what does the text afterwards mean. I know it might sound stupid, but im a newb and can only help others by learning more.

peace


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"Those who dance are considered insane by those who cannot hear the music." - George Carlin

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Re: Amanita Muscaria var. formosa, versus Amanita Frostiana [Re: DepthToTheCore]
    #2935474 -

The var. stands for variation. It's basically a sub-species, unless my information on the subject is sorely wrong. No doubt someone else could easily expand on the subject some more.

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Re: Amanita Muscaria var. formosa, versus Amanita Frostiana [Re: Darcho]
    #2936099 -

ToxicMan, thanks for your help on this forum you are the ID-master.


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"It is only those who do nothing who make no mistakes."
-Peter Kropotkin


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Mushrooms, Mycology and Psychedelics > Mushroom Hunting and Identification
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