Observation 27388: Amanita muscaria var. guessowii Veselý

When: 2009-10-26

Collection location: Beaver Co., Pennsylvania, USA [Click for map]

Who: Bob Zuberbuhler (Bob Z)

No specimen available

A medium size mushroom with a flat, yellowish cap with lighter colored excrescences. The white gills just meet the stalk. Remnants of a parial veil are seen around the cap edges and on an upper stalk ring. The stalk is quite bulbous below. A nearby button stage mushroom had a nearly sperical cap with similar excrescences and a stout stalk that had severl “bracelets” that were not present in the mature mushroom. Several of these mushrooms were found in a grassy field near a woods margin.

Proposed Names

-10% (2)
Recognized by sight
24% (4)
Recognized by sight: orange tones to both cap and basal bulb.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Dates of occurrence of var. persicina
By: R. E. Tulloss (ret)
2010-05-29 00:16:41 CDT (-0400)

I know of 11 preserved collections of A. muscaria var. persicina. The earliest dates are from areas that become cold fastest in the fall (mountain areas away from the coast). The earliest date from any of these collections is 25 Sept. (TN), the second earliest is 27 Sept. (NC). Other dates fall in Oct. (AL, NJ, NY, TN), Nov. (AL), and Dec. (AL and MS). The collections were all either mentioned in the original description or revised by me. These collections also include those that had four loci sequenced by Dr. Geml in his study of muscarioid taxa.

Individual fruitings of many fungi may occur occasionally outside their “normal” fruiting periods. In New Jersey, we sometimes see the yellow variant of amerimuscaria in wet Springs (I have collections with May dates, but not many). My experience is that while the latter entity may be found occasionally throughout the eastern collecting year, it is (by far) more frequent from September through early November.

If we want to characterize the period(s) of greatest occurrence of these fungi we need documented collections that can have their identities checked.


Out of season
By: Erlon (Herbert Baker)
2010-05-29 00:11:12 CDT (-0400)

Any mushroom can be found out of season if the conditions are right, i went back over the shroomery finds, i found some as early as the end of may, that i I.D’ed for you weilliii in Georgia.. Now i see THIS observation was in October lol, oh well!

No one has reported any A. persicina finds yet this year at the shroomery.

Debbie, Herb
By: AmatoxinApocalypse (AmatoxinApocalypse)
2010-05-28 20:05:52 CDT (-0400)

DEBBIE—-I agreed with you Debbie because of the first and fourth pic down, the color of the pileus looks identical to what I have found and called Amanita muscaria var. persicina, also the lack of concentric rings around the base on the older specimen fit all the collections I have found that have been mature.

One of the observations I posted of persicina from last year shows concentric rings around the bulb on a very young specimen, but the rings fade fast once they age.

Some mushrooms fruit all year long Debbie, Oysters do which is a plus! I never stop finding mushrooms, every month provides a new group to go out and find.

HERB—-I made a post a few years ago on another mushroom site in the month of June showing Amanita muscaria var. persicina. I just don’t look for them in the earlier months of the year because they are not that common, I know several members on the mushroom site “The Shroomery” that have found persicina in the early summer months. I am not doubting anyone’s ID on this one, I still have a lot to learn about the genus, but I can tell you for sure that persicina does occur in the summer months.

gosh, you still have mushrooms restricted to seasons out east? ;)
By: Debbie Viess (amanitarita)
2010-05-28 19:36:49 CDT (-0400)

all bets are off here in the west, where our early winter mushrooms are still coming on, almost into summer!

If guessowii also has orange coloration on the bulb, then it could well be that amanita rather than persicina. I have little experience with guessowii here in the west, and have only seen it east in its bright yellow forms. I did collect a bunch of persicina last year, tho, much to my delight!

you easterners will just have to battle it out…i threw the persicina name in the ring for debate purposes, since it did have some of the macro qualities of that mushroom….

By: Erlon (Herbert Baker)
2010-05-28 19:35:17 CDT (-0400)

All of the observations here at M.O have been in the fall, including yours.

By: AmatoxinApocalypse (AmatoxinApocalypse)
2010-05-28 19:29:13 CDT (-0400)

The larger patches of Amanita muscaria var. persicina are found in the early summer through late summer here, tapering off during the fall. At least this has been my observation as well as several of my hunting partners.

When it gets really hot and humid out they grow like crazy, but once it starts to cool they disappear.

Amanita persicina
By: Erlon (Herbert Baker)
2010-05-28 19:22:00 CDT (-0400)

A. persicina is generally a fall mushroom, and this aint it.
The yellow form of A. amerimuscaria is coming up now however, in the east.

By: AmatoxinApocalypse (AmatoxinApocalypse)
2010-05-28 19:07:13 CDT (-0400)

I’m with Debbie on this one, I think it it Amanita muscaria var. persicina. The bulb on the older specimen sure looks like it with its weak concentric rings.

Here are some of my observations of Amanita muscaria var. persicina, they might help you out, check them all out they vary so much.

God Bless.







In response to your note…
By: R. E. Tulloss (ret)
2010-05-28 12:43:18 CDT (-0400)

The button mushroom would be typical of the yellow color variant of Amanita amerimuscaria (currently, often called A. muscaria var. guessowii). The more mature mushroom could very well be the same thing; however, without a dried specimen to be checked, it should be noted that the mature species could possibly be what is currently called A. muscaria var. persicina.


Created: 2009-10-26 13:42:16 CST (-0500)
Last modified: 2013-11-17 16:34:06 CST (-0500)
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