Observation 173720: Amanita virginiana (Murrill) Murrill
When: 2014-08-06
Herbarium specimen reported
0 Sequences

no immediately adjacent trees.

Substrate: in soil beside road.

Habitat: mixed deciduous + coniferous temperate rainforest, ~4500 ft.

Collectors: L. Gallagher, D. Newman & M. Voller.

Collected for the 2014 Fleshy Fungi of the Highlands Plateau course, taught by Andy Methven at the Highlands Biological Station in Highlands, North Carolina.

Proposed Names

29% (1)
Recognized by sight
92% (2)
Eye3 Eyes3
Recognized by sight: I’m interpreting the cap color as brown over the disc. This species was originally described from Mountain Lake, Virginia.
At least 5 genes sequenced by Santiago Sanchez for paper to appear soon in Journal of Biogeography. — Rod

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Confirmed by microscopic examination.
By: R. E. Tulloss (ret)
2014-09-20 08:59:22 PDT (-0700)

Thanks again for the material, Danny.

Very best,


Thank you, Danny.
By: R. E. Tulloss (ret)
2014-09-20 07:46:17 PDT (-0700)

The material arrived in yesterday’s mail.

These guys are tiny!

Very best,


By: R. E. Tulloss (ret)
2014-08-13 04:17:24 PDT (-0700)

Hello, Danny.

For the sectional assignment, in addition to the ring and volval sac and totally elongating stipe (which are sufficient for placement in Caesareae outside the tropics), look for clamps on basidia. These are present in the Caesareae and absent in the Vaginatae.

For assignment to species, you need cap color and basidiome habit. In addition, you will find that there are numerous two-spored basidia and rather large basidiospores. Without cap color you will have a problem segregating virginiana from pachysperma. At the moment, we do not have good genetic sequences of ANY gene from pachysperma; so no help there. We had suspect ITS from one collection of pachysperma and that was not used in the Sanchez paper I previously mentioned.

I did type studies of the “teeny American Caesareae” some years back (early 90s of the last Century). That paper is in the WAO website bibliography (I think the date is 1993…or 1994…it followed the Colombian amanitas paper). Also, the page on A. virginiana


is largely derived from the aforementioned paper (as a base) and is pretty thorough for that time period.

I hope this helps.

Very best,


By: Danny Newman (myxomop)
2014-08-12 20:54:13 PDT (-0700)

Thank you for the sharpshooting, as always. What might we search for/measure to better confirm this ID?

If I am correct in my guess at an ID, this species was also
By: R. E. Tulloss (ret)
2014-08-12 20:34:47 PDT (-0700)

just collected under a very mature, solitary oak during the NEMF 2014 foray in southern Maine.


This little species of the Caesareae is nicely photographed.
By: R. E. Tulloss (ret)
2014-08-12 20:30:28 PDT (-0700)


Created: 2014-08-12 20:24:07 PDT (-0700)
Last modified: 2014-09-20 11:26:26 PDT (-0700)
Viewed: 181 times, last viewed: 2017-11-28 16:09:19 PST (-0800)
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