Observation 135856: Amanita sect. Vaginatae sensu Zhu L. Yang
When: 2013-06-08
Herbarium specimen reported

Notes: Single specimen under pine. Cap about 1 1/2" across.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Thanks Rod!
By: Eric Smith (esmith)
2013-12-14 09:26:13 CST (-0500)

I agree that this material looks interesting. I don’t think I’ve found anything like it before.

Hello, Eric.
By: R. E. Tulloss (ret)
2013-12-08 17:30:56 CST (-0500)

This material is now accessioned for the herbarium.

Very best,

Rod

Thank you, Eric.
By: R. E. Tulloss (ret)
2013-06-11 23:18:51 CDT (-0400)

This is going to be very interesting to see up close and personal.

R

Yes Rod,
By: Eric Smith (esmith)
2013-06-11 21:39:47 CDT (-0400)

the gills were and are pinkish. No, I didn’t look at the spores. The specimen is already dried and packaged; ready for shipping.

I’m inclined to go with sect. Vaginatae; however, that is a bit of a puzzle…
By: R. E. Tulloss (ret)
2013-06-10 22:29:32 CDT (-0400)

also. I’ll buy in on Eric’s interpretation of the stem base. Eric, do you know anything about the spores?

In June along the Delaware in easternmost PA, I have seen the white species of sect. Vaginatae that is called “A. rasitabula” on WAO. But that has a volva that not only leaves so small fragments on the cap, but also has a very weak (sometimes tearing or otherwise broken) volval sac. This seems more robust.

The gills seem a little pinkish. Is that what you saw in the fresh material, Eric?

When I first saw the general form of the fruiting body I thought of A. ristichii; but, of course, that should have an annulus.

If I know this taxon, it must be in an unusual form this time round.

I’d like to take a look at it if possible, Eric.

Very best,

Rod

I was wondering
By: Eric Smith (esmith)
2013-06-10 19:09:40 CDT (-0400)

if weather conditions could do that…I’m not so sure. Thanks again Dave.

I agree about the basal bulb…
By: Dave W (Dave W)
2013-06-10 08:00:28 CDT (-0400)

missing from the albocreata/praecox profile. Only though that comes immediately to my mind is that the base of the one seen here may have been a collared bulb that pulled away from the stipe base due to weather conditions.

Eventually Rod will catch up with this one.

Good obsevations Dave.
By: Eric Smith (esmith)
2013-06-09 10:23:41 CDT (-0400)

This isn’t the “two concentric rings” at the shoulder of the stem’s bulb like in A. praecox. The limbus internus remains are much thicker than what I see on that species and the short, cottony, submembranous outer limb on A. praecox isn’t present here but rather a membranous, saccate, limbate volva. And it lacks the globose bulb one would expect to see in that species, BUT in thinking this through it doesn’t have the bulb I would expect to see in A. albocreata either. I thought it had a small bulb on it at first but now I’m not so sure. Should’ve cross-sectioned it when fresh.

The other thing that bothers me about the A. albocreata ID is that there were no hemlocks present. Pure pine though there may have been birch saplings in the understory. I’m confident that this mushroom is exannulate and I’m not sure which section to place it in currently. The gills were very lightly flesh colored en mass and the disc was darker than the cap and both features have magnified upon drying. There doesn’t appear to be much of a bulb at this point.

That’s an interesting basal structure on this one, Bob.
By: Dave W (Dave W)
2013-06-09 01:11:25 CDT (-0400)

From the Amanita Studies Website description of the stipe base of A. praecox, “The volva takes the form of two concentric white ridges on top of the stem’s bulb. The inner ridge (sometimes missing) representing the remains of the limbus internus (this material may also be left on the stem where it appears as sub-felted, white material). The outer ridge is sometimes a well-defined cottony white submembranous limb.” This seems to fit your specimen; although the color of your mushroom is paler than the range of cap colors given for praecox. A. praecox begins life with an annulus but often loses all evidence of it.

Created: 2013-06-08 22:14:31 CDT (-0400)
Last modified: 2013-06-14 17:18:06 CDT (-0400)
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