Observation 169037: Amanita sect. Vaginatae sensu Zhu L. Yang

When: 2014-06-16

Collection location: Big Thicket, Hardin Co., Texas, USA [Click for map]

Who: Ron Pastorino (Ronpast)

Specimen available

Found in the Turkey Creek Unit of the Big Thicket National Preserve.
Cap 6.6 cm across, sl tacky with striations 12mm long.
Spore print white and spores not amyloid.
Spores ~ 10.0-14.1 X 7.1-10.0 microns, mostly ellipsoid.
Q(range) = 1.27-1.52. Q(ave) = 1.37. n=21
A rather drab specimen but with large spores.

Species Lists


Spores in Melzers @ 1000X.
Spores in Melzers @ 1000X.

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Eye3 = Observer’s choice
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Add Comment
Thanks Ron,
By: groundhog
2014-08-18 12:25:54 PDT (-0700)

This material has been received and accessioned to Rod’s herbarium. We have scheduled it for DNA sequencing.

Thanks for sending this material, Ron.
By: R. E. Tulloss (ret)
2014-08-18 11:58:26 PDT (-0700)

The spores seem way to large for sole candidate that I can come up with, Amanitasp-T42.”

Very best,


Frrom the sand on the stem,…
By: R. E. Tulloss (ret)
2014-07-04 20:13:04 PDT (-0700)

I’d say that half the stem was underground.

Yes, I’d like to see this material.

Very best,


Nothing that I would call a bulb,
By: Ron Pastorino (Ronpast)
2014-07-04 19:29:36 PDT (-0700)

and in the sandy and rooty soils of most of the Big Thicket, I find most of the Amanitas are buried fairly deeply and difficult to extract cleanly. Can’t recall exactly how deep this one was.
May I assume that this one is interesting enough to include in my next care package?

Another thought.
By: R. E. Tulloss (ret)
2014-07-04 17:07:18 PDT (-0700)

While we don’t have enough data on the likelihood of Texas Vaginatae having half the of the stipe below the surface of the soil (my guess is that the probability is pretty high), we do know that “sp-S01” will do that.

Very best,


Did you section this to see if there was a bulb on the stipe base?
By: R. E. Tulloss (ret)
2014-07-04 17:04:26 PDT (-0700)

It could be the volval sack is playing games with my eyes; however, the base of the stem looks as though there might be a bulb there. Of the species in our list for Texas and the Gulf Coast sp-T44 has spores of appropriate length; the the spores are subglobose rather than ellipsoid (which you report). So, if it’s in the Vaginatae, we haven’t recorded it previously.

The deeply buried stipe and the apparent bulb, suggested to me that it might be pale material of A.sp-S01” (sect. Amanita); however, I would have expected slightly higher Q for that species.

So I’m puzzled in either case. I’m very curious to know if there were a bulb.

Very best,


Created: 2014-07-04 13:55:05 PDT (-0700)
Last modified: 2014-07-04 14:01:17 PDT (-0700)
Viewed: 61 times, last viewed: 2018-04-19 07:36:01 PDT (-0700)
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