Observation 171596: Amanita variicolor Y. Lamoureux nom. prov.
When: 2014-07-28
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Looks like Amanita rhacopus but is quite a bit larger than what I normally find.

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Eye3 = Observer’s choice
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Thank you for the additional information.
By: R. E. Tulloss (ret)
2014-09-16 23:13:10 CDT (-0400)

Thank you again for the generous shipment.

Very best,


By: Erlon (Herbert Baker)
2014-09-16 22:36:15 CDT (-0400)

It is possible, but my hunch is, they are all the same. The other morphological aspects are similar. They were found growing within inches of one another.

possibly a mixed collection?
By: groundhog
2014-09-16 17:38:41 CDT (-0400)

The less mature fruiting body with a white cap margin is somewhat similar to A. variicolor proposed by Yves Lamoureux.
Very Best,
Rod and Naomi

Thanks Herbert,
By: groundhog
2014-09-16 17:35:45 CDT (-0400)

We have received this material and accessioned it to Rod’s herbarium.

The absence of dark fibrils on the stem.
By: R. E. Tulloss (ret)
2014-07-29 13:00:46 CDT (-0400)

Dark fibrils on the stem in the Vaginatae usually go with dark pigment in the “velcro” on the gill edges. If the volva becomes dark with age, then the Velcro may also become dark with age, and likewise for the fibrils on the stem. There’s some sort of shared chemistry at least while the gill edges are intimately connected to the stipe surface during development in the button.

It is quite possible that you don’t have rhacopus. There are a number of near look-alikes. Sorting out consistent differences between them (other than genetic) is an on-going issue for us. Some of them do not usually have dark fibrils on the stem. But right now, I don’t know if that is a consistent character of these “genetically segregated” species.

I will be very interested to see what we learn from your collection.

Very best,


By: Erlon (Herbert Baker)
2014-07-29 11:43:50 CDT (-0400)

Rod, You are correct in your assessment of the colors. The ones with the flash add a yellowish/reddish hue. I will use flash if I feel my camera is not capturing some of the detail, in low light. I did not notice the typical snakeskin pattern on the stipe of these specimens. They were growing under quite a bit of cover, so perhaps the lack of sunlight caused this? Eventually, I will upgrade my very cheap Canon A490. It has served me well, but I desire more. It is very hard to focus this camera without the flash, the little red ‘camera shake’ icon doesn’t like to turn off when I don’t use the flash and the photos usually come out blurry. Thank you.

Hello, Herbert.
By: R. E. Tulloss (ret)
2014-07-29 09:11:04 CDT (-0400)

This is very interesting.

I’d very much like to look at this collection and check it against our collection of DNA from rhacopus-like taxa.

The cap color varies from photo to photo (as often happens). Which image would you say is most like the natural color your perceived in the fresh material?

My guess is the second from the top a medium grayish brown without reds or yellows in the mix.

Very best,


Created: 2014-07-29 00:50:46 CDT (-0400)
Last modified: 2014-09-16 23:13:39 CDT (-0400)
Viewed: 116 times, last viewed: 2017-07-31 00:25:50 CDT (-0400)
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