Observation 26650: Amanita citrina f. lavendula (Coker) Veselý
When: 2009-10-15
No herbarium specimen
0 Sequences

This late-season straggler was in the usually-fairly-quiet Zone 07. Despite the cold weather (single digits by day, frosts by night) it’s not f. lavendula. (The final photograph is the “hypermagenta test” and though some magenta showed up in the background, the mushroom shows none of it. Indeed, I applied it to all four photos with negative results.)

Proposed Names

54% (5)
Recognized by sight: the purple gray veil is classic.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Taxonomy Wars: Episode IV
By: Paul Derbyshire (Twizzler)
2010-03-02 04:58:49 PST (-0800)

And another one of my obses falls victim to the crossfire. Sigh.

The magenta test only works if staining has occurred…
By: R. E. Tulloss (ret)
2010-03-01 21:34:01 PST (-0800)

The magenta test only works if staining has occurred.

Regarding southern distribution… Well, I think we have to keep an open mind. At the Cape Code foray in 2009. There were some of the most purple lavendulas that I’ve ever seen in my life. With temperature just a tad above freezing and everything soaking from continuous cold rain, there were a couple of buttons of lavendula that I will never forget that were like two amethysts. I sure hope somebody got a photograph of them. I don’t think I did.

Sometimes, we just don’t know what name to use. This is why it’s good to dry material so that you can come back to it when collective wisdom has advanced.

Very best,


By: Erlon (Herbert Baker)
2010-03-01 19:24:22 PST (-0800)

It may not be A. brunnescens f. straminea, but if your using the magenta test as a tool to delineate f. lavendula from the European A. bulbosa var. citrina, couldn’t we safely assume it is not f. lavendula that is presented here?

I believe one of the things that separated the two was a more southerly distribution of f. lavendula?

I chose A. brunnescens f. straminea because its the only other name we have to use.

I am curious citrin.
By: R. E. Tulloss (ret)
2010-03-01 13:54:20 PST (-0800)

Since there is a type specimen of Amanita brunnescens f. straminea_, there is a way of (possibly) identifying this taxon. But it would require microscopy. How did we come up with the current ID? Is it because the specimen didn’t turn lavender? I don’t think that that’s a good enough reason to assume that we have a positive ID for "_brunnescens f. straminea." As I pointed out in another comment a few days ago: I don’t really have convincing evidence that brunnescens f. straminea is the same as, or different from, citrina f. lavendula. I don’t think anyone else does either, but I’d be interested to hear otherwise.

Was the bulb dug up on this specimen? Do we have evidence that this is indeed a citrina-like mushroom?


Created: 2009-10-15 18:01:16 PDT (-0700)
Last modified: 2015-05-30 11:56:21 PDT (-0700)
Viewed: 214 times, last viewed: 2017-06-06 01:56:59 PDT (-0700)
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