Observation 112157: Amanita muscaria var. persicina Dav.T. Jenkins
When: 2012-10-03
Who: dial8
No herbarium specimen

Images

268459
268461
268523
These pictures are of the same mushroom a day later. The cap has expanded quite a bit.
268524
These pictures are of the same mushroom a day later. The cap has expanded quite a bit.

Proposed Names

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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pigments
By: R. E. Tulloss (ret)
2012-10-03 15:09:58 PDT (-0700)

Years ago, Dr. Bill Cibula told me that he had conducted experiments on the cap pigments in what we now call var. persicina. He found three substances. In their initial form (before exposure to sunlight) they are yellow, purple, and colorless. The human eye sees the combination of the yellow and purple pigments as RED. The purple pigment becomes transparent in sunlight and the originally transparent pigment becomes brown. I forget what happens to the yellow pigment…if anything. Kind of ticked that I can’t remember the whole story. I have never been able to find anywhere where Dr. Cibula wrote down this information. Late in his life he told me that it was in his PhD thesis of which he sent me a copy. I have not been able to find the specific information in that document…sadly.

Very best,

R

sunlight and fading
By: dial8
2012-10-03 14:55:20 PDT (-0700)

YOur right. There are some other younger mushrooms that are a brighter red. The one I have pitures of is even lighter(more yellowish) than yesterday. Some of the older ones still growing have darker and lighter areas that pretty much corrispond with the way the sunlight falls.

Pictures in different stages of development will also help because…
By: R. E. Tulloss (ret)
2012-10-03 12:50:08 PDT (-0700)

this species is very liable to have its pigments altered by sunlight. A button or a shaded specimen might have a brighter colored cap.

R

Another photo
By: dial8
2012-10-03 12:44:29 PDT (-0700)

There are more growing. I will go back to see if I can get a photo of the entire mushroom.

In Alabama, the most likely muscarioid taxon …
By: R. E. Tulloss (ret)
2012-10-03 12:36:46 PDT (-0700)

is probably Amanita muscaria var. persicina.

The form of the volva around the lower stipe and bulb is one of the few ways to give a reasonably accurate ID from a photograph. So… are you close enough to this mushroom to get a picture of the part that was/is underground?

R

Tried to edit
By: dial8
2012-10-03 12:14:00 PDT (-0700)

Tried to edit the name so it said Amanita muscaria sensu auct. amer.
have not used this site is quite sometime and had difficulty with the edit for some reason.

Created: 2012-10-03 12:03:51 PDT (-0700)
Last modified: 2012-10-03 13:25:52 PDT (-0700)
Viewed: 95 times, last viewed: 2017-01-20 12:11:39 PST (-0800)
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