Public Description of Amanita calyptroderma G.F. Atk. & V.G. Ballen

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Name: Amanita calyptroderma G.F. Atk. & V.G. Ballen
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Description status: Approved
 (Latest review: 2012-02-26 09:04:28 PST (-0800) by nathan)

Taxonomic Classification:

Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Amanitaceae
Genus: Amanita

General Description:

With the clarifying publication of the name Amanita vernicoccora by Bojantchev, Pennycook, and Davis (, this name now only applies to the fall coccora. This species fruits in the Fall (Nov.-Dec. with occasional records from early January) and has an orange to brown pileus and usually grows with madrone, tan oak, and Douglas fir. It has an unusually thick universal veil which leaves an ample volval sack and a thick white patch on the cap.

Diagnostic Description:

The key distinguishing macroscopic features are a thick volva that typically leaves a large patch, a distinctly striate margin, a skirt-like, membranous veil and thick saccate volva. The brown-orange color cap colors are also distinctive. Another notable feature is that the young “eggs” have a gelatinous core when fresh. However, this feature fades with age or can be missing all together in dry weather.


Western North America including California, Oregon, Washington, British Columbia and Mexico.


Most frequently associated with madrone, tanoak or fir, but can also occur with live oak.

Look Alikes:

This one of the most popular edible Amanita species in western North America. It is particularly popular within the Italian immigrant community where it is known as either the Coccora or Coccoli. However, its similarity to several deadly poisonous Amanita species (A. phalloides and A. ocreata) make even very experienced mushroom collectors take particular caution in ensuring they have a correct id. This species is not recommended for beginning collectors and should not be commercial sold since it may give consumers the wrong impression of what wild mushrooms are safe to eat.


Bojantchev, D., Pennycook, S. R., Davis, R. M. 2011. Amanita vernicoccora sp. nov. —the vernal fruiting ‘coccora’ from California. Mycotaxon, Volume 117, July-September 2011. Available at

Arora, D. 1986. Mushrooms Demystified, 2nd Edition. Ten Speed Press, Berkeley, California. 959 pp.

Jenkins, D.T. 1986. Amanita of North America. Mad River Press, Eureka, CA.

Lincoff, G.H. 1981. The Audubon Society Field Guide to North American Mushrooms. Alfred A. Knopf, Inc., New York.

Phillips, R. 1991. Mushrooms of North America. Little, Brown and Company, Boston, MA.

Thiers, H.D. 1982. The Agaricales (Gilled Fungi) of California. I. Amanitaceae. Mad River Press. Eureka, CA.

CABI biosciences Index Fungorum,


Rod Tulloss’ Amanita Site,


The Bojantchev, Pennycook & Davis article provides a discussion of the nomenclatural issues that have long haunted this species.

Description author: Nathan Wilson (Request Authorship Credit)

Created: 2007-02-20 20:27:23 PST (-0800) by Nathan Wilson (nathan)
Last modified: 2012-02-26 09:04:28 PST (-0800) by Nathan Wilson (nathan)
Viewed: 1027 times, last viewed: 2015-11-25 22:54:17 PST (-0800)