Observation 168848: Amanita Pers.
When: 2014-06-29

Notes: Combinations of traits… sac-like volva, partial veil, UV remnants on cap, and what seems to be lack of sriations on the cap margin seem perplexing…?

I suspect this may just be an atypical example of praecox… stipe base not fully expanded allowing elongated margin on volva to remain intact, cap insufficiently expanded for striations to become observable.

Specimen preserved and will be included in a package.

Collected at the Upper Delaware Bioblitz.

Proposed Names

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Eye3 Eyes3
Recognized by sight
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Eye3
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Comments

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Thanks Rod.
By: Dave W (Dave W)
2014-09-04 04:35:27 BST (+0100)

Your comments on striations are consistent with my own observations of variably-sized, variably-fleshy velatipes specimens. The robust ones also seem to have striations that are fainter.

There are a couple of variables related to marginal striations on caps in Amanita.
By: R. E. Tulloss (ret)
2014-09-03 17:34:08 BST (+0100)

If the fruiting body is very robust, the cap flesh may be thicker than usual, and this usually correlates with striations that are shorter than usual.

If the fruiting body is depauperate (smaller and scrawnier than usual), then marginal striations will be proportionally longer…in fact they may appear on species that normally lack marginal striations.

Aging and drying will cause marginal striations to become longer than they would normally be.

The pictured specimen is quite a bit smaller than a normal velatipes. This has striation consequences (above). If it were multisquamosa, then one would expect longer striations in the first place.

I hope this adds a little more food for thought with regard to your last comment.

Very best,

Rod

Looking at this one more time…
By: Dave W (Dave W)
2014-09-03 03:47:56 BST (+0100)

when I zoom in on the photo of the cap in profile, I see faint marginal striations that seem to fade out at distances between 0.1R and 0.25R … or at least they look like striations. (It never ceases to amaze me… what becomes visible when zooming a photo.) Comparing with other photos of velatipes I see several examples which feature widely spaced, short, rather faint striations. Other examples with fairly long striations are also available. The technical description of velatipes found in the Amanita website lacks a lower bound for velatipes striation length. So this appears to be a highly variable trait in association with this species. (Actually, I wonder about the true identity of some of what one finds on the internet under the name “velatipes.”)

The basal structure of this specimen still seems mysterious to me.

Thanks Dave,
By: groundhog
2014-09-02 20:10:25 BST (+0100)

This material has been received and accessioned to Rod’s herbarium.
-Naomi

You’re welcome, David.
By: R. E. Tulloss (ret)
2014-07-01 18:47:39 BST (+0100)

R

Yes, I noticed what appears to be…
By: Dave W (Dave W)
2014-07-01 17:39:53 BST (+0100)

the beginning of an “inverted funnel” annulus, like what one expects with velatipes.

So perhaps an atypical example of velatipes. I looked at some photos of velatipes buttons and the striations are sometimes difficult to detect.

This would be the first velatipes I have seen this year. So I guess my expectation was colored by having seen a good number of examples of praecox this year.

As always, thanks for input, Rod.

It seemed to me that the partial veil is being drawn upward…
By: R. E. Tulloss (ret)
2014-07-01 13:38:48 BST (+0100)

in the third photograph.

Very best,

Rod

I think these species names run into…
By: Dave W (Dave W)
2014-07-01 05:02:51 BST (+0100)

the same problem as praecox… sheathing sac-like volva and (apparent) lack of marginal cap striations. Striations are often difficult to see on immature velatipes. But with some effort I’m usually able to observe them. With this one, I examined the margin with a loupe and found only some very faint streakiness.

How about…..
By: R. E. Tulloss (ret)
2014-07-01 04:43:35 BST (+0100)

multisquamosa or velatipes?

R

Created: 2014-07-01 04:35:11 BST (+0100)
Last modified: 2014-09-03 03:35:36 BST (+0100)
Viewed: 64 times, last viewed: 2016-07-25 15:02:23 BST (+0100)
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