Observation 55833: Amanita gemmata group

Displayed at the 2010 Oregon Mycological Show.

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I still think I had A. citrina, though.
By: Daniel B. Wheeler (Tuberale)
2010-10-19 19:56:32 SAST (+0200)

But it was different than this material. My stipe was completely white and somewhat scurffy. I don’t recall a double ring at the volva. I do recall exactly the bright lemon-yellow cap with white volval patches on it, and nearly a field of these (over 50 specimens) grouped near each other on Larch Mountain.

Dr. Lorelei has stated she believes we have many many more species of fungi than have been described in science to date. I have not seen A. citrina from the east coast, having never travelled there. But my field observation did appear to match the description of A. citrina more than other species.

Then, of course, there’s the interesting crossing between Amanita species going on here in Oregon … Just hope the recent introduction of A. phalloides doesn’t start showing up in stomachs soon.

Thanks for the suggestion, Debbie.
By: R. E. Tulloss (ret)
2010-10-19 16:36:31 SAST (+0200)

That seems plausible, Debbie.

The material will tell the tale…some day.


I saw a lot of yellowish amanitas this past week in the PNW
By: Debbie Viess (amanitarita)
2010-10-19 03:51:16 SAST (+0200)

and not a one of them resembled the citrina of the east coast, which really looks more like a phalloides than a gemmata. What I think is that there are undescribed species in the PNW of yellow amanitas with collars or tight, more elongated volvas (like breckonii or exannulata-esque). Some even start out with caps a bit orangish.

I think that folks are just picking a name for something different that they see on a regular basis…but I don’t believe this mushroom is a match for citrina as we know it.

Once again, surprise, surprise, more work needs to be done.

The pictured species…
By: R. E. Tulloss (ret)
2010-10-19 03:26:57 SAST (+0200)

The pictured species appears to have 2 or more rings around the base of the stem above the bulb. This isn’t a characteristic of citrina-like taxa.

I don’t recall citrina being in the Amanita key of the Northwest Key Council. I’m going by memory; so I might be wrong.

I’m interested in obtaining dried material of what you would consider to be typical “citrina” for your collecting area. Interesting.

Very best,


I have found A. citrina, Rod.
By: Daniel B. Wheeler (Tuberale)
2010-10-19 03:11:17 SAST (+0200)

Collected material from under Douglas-fir in a 50-year-old stand on Larch Mountain, Multnomah County, Oregon. Also have collected it from the Columbia River Gorge area. It usually has a bright lemon-yellow cap, but the stem is unlike this material. Jan Lindgren might be able to assist in your quest.

Very unlikely…
By: R. E. Tulloss (ret)
2010-10-19 02:34:02 SAST (+0200)

This is not a likely ID for a mushroom from the PNW of the U.S. I had not ever heard of anyone from the PNW using the name “Amanita citrina” for any taxon at all. Can anyone clarify whether this name is currently in common usage in Oregon and/or Washington for a native mushroom?


Created: 2010-10-19 01:16:58 SAST (+0200)
Last modified: 2010-10-19 03:51:49 SAST (+0200)
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