Observation 209634: Amanita russuloides (Peck) Sacc.

Proposed Names

28% (1)
Recognized by sight
56% (1)
Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Of course.
By: R. E. Tulloss (ret)
2015-07-12 14:34:50 CDT (-0500)

Mike Kuo’s description undoubtedly influences the use of the name russuloides.

Very best,

Rod

A fragile ring is plausible.
By: R. E. Tulloss (ret)
2015-07-12 14:33:19 CDT (-0500)

I think that “sp-S01” may sometimes have a ring in early stages of expansion.

Very best,

Rod

No, not your thought process, Stephen.
By: R. E. Tulloss (ret)
2015-07-12 14:24:58 CDT (-0500)

More general than that. I notice that more people seem to be using russuloides on MO in the last year or two. Maybe it’s a false impression. I’m trying to figure if there is a common factor in terms of choice of the name as a potential determination. So far, I don’t think so.

I’m in the midst of trying to find out by genetic means how many candidates there are for the name russuloides.

I have thought in the past that I probably have created more than one temporary code for russuloides. If it is a common species (and I think that Peck considered it such), then I probably have at least one temporary code number for it. I believe that sp-S01 is a candidate. We have recently found this is one of the species of Amanita that has more than one nrITS sequence among the multiple copies that are present in the genome (i.e., every cell will have a non-homogeneous mix of nrITS…at least in some populations). When this variability is taken into account, “sp-N60” apparently applies to the same organism as “sp-S01.”

So there are two candidate names that appear not to apply to different species. I have a few other temporary codes that might turn out to fall into the same pigeon hole. We have just sent most of the relevant collections out for sequencing during the last two months as part of a batch of samples numbering in the hundreds that will be sequenced under the supervision of Dr. Jozsef Geml in Leiden. We may start to see some return on this investment later this summer. We don’t know how many of the samples will yield useful DNA. So I can’t predict an outcome. We certainly hope to have the opportunity to learn a few things.

Very best,

Rod

And now I will remember
By: Stephen Russell (Mycota)
2015-07-12 14:15:55 CDT (-0500)

to add exannualate to that list. Kuo lists A. russuloides as having a fragile ring.

I was looking at
By: Stephen Russell (Mycota)
2015-07-12 13:31:05 CDT (-0500)

Yellow-green cap, collar, few warts, strongly lined margin. Not a persistent ring on the stem on this one, but there were with other specimens nearby. Obviously I am missing something if you are questioning the thought process…

I apologize, if I’ve asked this question before.
By: R. E. Tulloss (ret)
2015-07-12 12:46:08 CDT (-0500)

I am very interested in the question of how people use the name russuloides. May I ask how you decided to use the name in this case?

Very best,

Rod

Created: 2015-07-11 23:08:34 CDT (-0500)
Last modified: 2015-07-12 13:26:17 CDT (-0500)
Viewed: 57 times, last viewed: 2016-10-28 08:38:15 CDT (-0500)
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