Observation 137479: Amanita velatipes G.F. Atk.

Proposed Names

32% (2)
Eye3
Recognized by sight
24% (3)
Recognized by sight: Looks like there was an annulus (in situ) that fell off when the mushroom was collected.
ret
44% (2)
Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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By: R. E. Tulloss (ret)
2013-06-26 15:20:39 CDT (-0500)

In picture two the partial veil clearly was originally funnel-shaped although the edge of the partial veil is drooping.

In picture three, the basal bulb has a rolled-sock type of volva at its top.

I think that it is good bet that you have some nice photos of really gooey A. velatipes.

Very best,

Rod

Dinner plate size can be assumed to eliminate praecox.
By: R. E. Tulloss (ret)
2013-06-26 15:14:30 CDT (-0500)

Spores can be discouraged from falling from a cap by something as simple as a significant change of altitude between a collecting site and the lab or home where a spore deposit set up is attempted. In Costa Rica, Roy Halling and other adapted to this problem by having the mushrooms vertical in the collecting basket and slipping a slotted 3 by 5 " note card around the stem just below the gills (then wrapping the specimen before setting the specimen in the vertical position in the basket).

The next question to help with diagnosis from pictures alone is this: When the partial veil was still in position on the stem did it look like it was originally funnel-shapped (narrow end down) or skirt-like (narrow end up)? If the former, then A. velatipes is a reasonable start at an ID. If the latter then (perhaps) A. sp-S01 is a reasonable start at an ID. The former species would be very likely to have a “rolled sock” volva on the top of the bulb; the latter, an irregular flap of tissue (a limb) probably not of uniform height around the top of the bulb (bottom of stem).

Very best,

Rod

No Spores.
By: Emma Harrower (eharrower)
2013-06-26 12:09:24 CDT (-0500)

The size of the cap of the large one seemed dinner plate sized (like muscaria) to me, but I had no scale to be certain. They were glistening with their viscosity. There are no spores because I did have a container to carry it in. Next time I’ll at least keep a slice.

I think spore measurements would be useful in this case, Emma.
By: R. E. Tulloss (ret)
2013-06-24 13:45:11 CDT (-0500)

It will be important to measure the spores in lateral view because one alternative praecox has subglobose spores in lateral view, while the other alternative (or alternatives) which include A. sp-S01 have ellipsoid spores in lateral view.

There is a discussion of “lateral view of spores” on the www.amanitaceae.org website in the discussions of methodology. The teaching topic (upper left of every taxon page) on spore size and shape may also be useful.

Very best,

Rod

Created: 2013-06-24 12:03:48 CDT (-0500)
Last modified: 2013-06-28 10:53:07 CDT (-0500)
Viewed: 47 times, last viewed: 2015-08-03 20:06:10 CDT (-0500)
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