When: 2010-12-03

Collection location: Forest of Nisene Marks State Park, Aptos, California, USA [Click for map]

Who: Jeff Riedenauer (Tamsenite)

No specimen available


Proposed Names

2% (2)
Recognized by sight
55% (1)
Used references: md and mo

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

= Observer’s choice
= Current consensus


Add Comment
By: R. E. Tulloss (ret)
2010-12-04 05:51:08 PST (-0800)

You’re welcome.


By: Jeff Riedenauer (Tamsenite)
2010-12-03 21:26:23 PST (-0800)

Thanks for the good info. A. constricta seems to be a more likley choice.

The answer in both cases is yes…
By: R. E. Tulloss (ret)
2010-12-03 20:47:28 PST (-0800)

In both cases, the answer is “yes.”

The volva of A. constricta will become gray in age and becomes quite fragile.

The trouble with A. vaginata is that it is a European species (the name has been misused just about everywhere in the world where a species of sect. Vaginatae has been found). It is highly unlikely to occur in North America.

For available information on A. constricta you may wish to go here:


Very best,


By: Jeff Riedenauer (Tamsenite)
2010-12-03 20:34:20 PST (-0800)

Even this young? Is a. vaginata or constricta more uniform? How come I feel I’ve made this mistake before (don’t answer that)?

The cap is a relatively uniform color
By: R. E. Tulloss (ret)
2010-12-03 20:25:30 PST (-0800)

Amanita pachycolea has a notably zonate cap.

Both brief and detailed/technical descriptions are available here:

There are several taxa from the Pacific states in sect Vaginatae that are not yet named. Two that are brown-capped or gray-capped are known largely from technical descriptions. These can found here:


Very best,