Observation 23889: Amanita caesarea group

When: 2009-08-02

Collection location: Hawn State Park, Missouri, USA [Click for map]

Who: Patrick Harvey (pg_harvey)

Specimen available

Proposed Names

92% (2)
Eye3 Eyes3
Recognized by sight: Partial veil not broken yet.
74% (2)
Recognized by sight: in section caesarea.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Patrick Harvey (pg_harvey)
2009-08-04 07:08:35 MST (-0700)

I have that button dried — will come to you soon.

See notes on the big one — I had a little disaster this morning!


I have the same impression as Weiliiiiiii
By: R. E. Tulloss (ret)
2009-08-04 06:05:03 MST (-0700)

In response to Weiliiiiiii: There are about 30 taxa in sect. Caesareae in the U.S. and Canada (with at least another half-dozen in Mexico…probably an underestimate). About half are unnamed. The species of the Caesareae known from the eastern U.S. and Canada include

1. Amanita arkansana Rosen. 1926.
2. Amanita banningiana Tulloss. nom. prov.
3. Amanita calyptrata var. albescens Peck. 1900.
4. Amanita chambersiana Tulloss nom. prov. (recutita sensu Coker. 1917.)
5. Amanita cinderellae Tulloss nom. prov. (Amanita species N4)
6. Amanita cokeriana Singer. 1948.
7. Amanita jacksonii Pomerleau. 1984.
8. Amanita murrilliana Singer. 1950 [“1949”].
9. Amanita pachysperma G. F. Atk. 1918.
10. Amanita spreta (Peck) Sacc. var. spreta. 1887.
11. Amanita spretella (Murrill) Murrill. 1948.
12. Amanita subvirginiana (Murrill) Murrill. 1941.
13. Amanita virginiana (Murrill) Murrill. 1914.
14. Amanita species 53 (“Londo Mollari’s Slender Caesar”)
15. Amanita species AR1
16. Amanita species F2
17. Amanita species F10
18. Amanita species F11
19. Amanita species F16 (“Tequila Sunrise Slender Caesar”)
20. Amanita species ONT1
21. Amanita species QUE1
22. Amanita species S10
23. Amanita species T24
24. Amanita species T31
25. Amanita species T41
26. Amanita species V2

There are more in the western part of the US. So far as it is known, the western taxa do not include species in stirps Hemibapha (the “Slender Caesars”).

The codes beginning with “T” are explained to some degree in the east Texas and Gulf Coast checklist. Many of the above “numbered” taxa are included in the key to the Caesareae that is found on the Amanita Studies web site. The omissions in that key will be entered as soon as I can do so.

Very best,


By: Erlon (Herbert Baker)
2009-08-04 06:00:15 MST (-0700)

I dont know, these look rather orange.. http://www.mushroomexpert.com/amanita_jacksonii.html

Cap color
By: AmatoxinApocalypse (AmatoxinApocalypse)
2009-08-03 20:39:05 MST (-0700)

The cap color seems a bit orange to be A. jacksonii at this stage of growth.

Every time I have seen this species it is bright red until it matures some.

How many caesarea group Amanita are there in north America?

Created: 2009-08-02 19:50:23 MST (-0700)
Last modified: 2011-09-22 07:50:55 MST (-0700)
Viewed: 180 times, last viewed: 2017-08-31 18:18:09 MST (-0700)
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