Observation 9904: Amanita citrina (Schaeff.) Pers.
When: 2008-08-18
No herbarium specimen

Notes:

[admin – Sat Aug 14 01:58:06 +0000 2010]: Changed location name from ‘babcock’ to ‘Babcock State Park, West Virginia, USA

Proposed Names

ret
54% (1)
Recognized by sight: See Amanita Studies webpage for this taxon.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Another possible name…
By: R. E. Tulloss (ret)
2008-08-24 16:07:09 PDT (-0700)

Over the last few decades, I’ve become convinced that we don’t have the Eurasian Amanita citrina in North America. But, at the moment, we don’t have an alternative name at species rank. In the last two years, I raised the question of whether or not all of our “citrinas” might be the so-called “form lavendula” that I am suggesting here as an alternative determination in the case of this observation.

Here’s a suggested experiment: If you find an “A. citrina,” put it in the refrigerator overnight and see if you can get it to bruise lavender by scratching the stipe. If that doesn’t work, try putting it in your refrigerator’s freezer compartment briefly (may take some experimentation) and repeat the scratch test. From my experience, there is a good chance that you will get a lavender reaction to the scratch test after a certain amount of exposure to cold (I haven’t figured out the exact temperature(s) or corresponding period(s)). A freezing night or a near freezing night has often brought out a lavender speckling or a lavender reaction to the scratch test in my experience. I’d very much like to know what readers of this forum find when they try the experiment(s) themselves. And…why not document your results right here on MushObs?

There’s a discussion of f. lavendula on the Amanita Studies site.

Very best,

Rod Tulloss

Created: 2008-08-23 09:25:58 PDT (-0700)
Last modified: 2013-11-25 05:13:45 PST (-0800)
Viewed: 25 times, last viewed: 2016-10-22 01:22:14 PDT (-0700)