Observation 114564: Amanita morrisii Peck
When: 2012-10-25
Herbarium specimen reported

Notes: A small and fragile specimen, growing alone on the edge of a trail near Chatsworth Lake.

The cap is 5.0 cm in diameter.

The stipe is 6.5 cm long and is narrowing towards the top, where it’s only 0.5 cm in diameter. The reading just below the middle is 0.7 cm.

The bulb is almost perfectly globose and is 1.2 cm in diameter.

The odor was very pleasant.

The material is saved for RET.

Proposed Names

54% (1)
Based on chemical features: See comments below. http://www.amanitaceae.org?Amanita+morrisii

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
You’re welcome, Igor.
By: R. E. Tulloss (ret)
2014-01-18 07:35:36 CST (-0500)

You’re collections are very useful.


Thanks for posting, Rod
By: I. G. Safonov (IGSafonov)
2014-01-17 18:03:21 CST (-0500)
The DNA from this specimen suggests this is Amanita morrisii.
By: R. E. Tulloss (ret)
2014-01-17 00:18:46 CST (-0500)

That is also supported by the pinkish tint to the underside of the partial veil. Apparently the partial veil either stretched a great deal or the surface of the stipe was peeled off of the stipe above the point of attachment of the annulus. You can see the pinkish underside of the partial veil is only clearly present near the cap margin. The width of the pinkish band is usually the width of the whole skirt on the stem of A. morrisii so something happened here to add to what is usually the small narrow ring.

The photos of the cap seem to have much to much red in them, but I think Igor has explained that this is a problem with his camera.

The cap of A. morrisii is very dark at first and becomes brownish gray or gray upon expansion.

The location of the collection near water is also a character of morrisii, which seems to like to have its “feet” wet.

The cap color certainly had me fooled.

The sequence derived from this specimen was from part of the LSU (nuclear ribosomal Large Subunit) gene…for all you sequence fans out there. :)

Very best,


A sample from this collection has been sent for sequencing.
By: R. E. Tulloss (ret)
2013-10-16 13:34:52 CDT (-0400)

I’m sorry that we didn’t already post that information on this observation.

Very best,


Thank you again, Rod
By: I. G. Safonov (IGSafonov)
2013-08-12 22:37:18 CDT (-0400)
I can report that the specimen is on the list to be sampled now.
By: R. E. Tulloss (ret)
2013-08-12 20:25:48 CDT (-0400)


Thank you very much, Rod,
By: I. G. Safonov (IGSafonov)
2013-08-12 20:09:38 CDT (-0400)

for your detailed e-mail. I’m looking forward to the sequencing results…

Thank you for reminding me about this observation, Igor.
By: R. E. Tulloss (ret)
2013-08-12 13:41:25 CDT (-0400)

As I wrote to you at length, this observation has at least some chance of being Amanita “sp-N47”.

We will report back when we get a chance to have it sampled for sequencing.

Very best,


Created: 2012-10-26 19:49:05 CDT (-0400)
Last modified: 2014-01-17 18:01:05 CST (-0500)
Viewed: 75 times, last viewed: 2016-10-24 16:11:17 CDT (-0400)
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