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Notes:
These were growing in mixed woods.
Caps up to 5.6 cm across with striations up to 9mm long.
Cap color seemed to have a slight greenish tint.
Spores were ~ 9.0-12.0 X 8.0-10.1 microns.
Q(ave) = 1.19. Q(range) = 1.11-1.29.
Closest match that I could find on Rod’s regional checklist was sp-T33.

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Comments

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Yeah, I’m holding my total commitment to coprinopsoides in reserve.
By: R. E. Tulloss (ret)
2017-03-21 18:50:46 CDT (-0400)

I hope that another specimen will show up.

Very best,

Rod

Thanks Rod, I’m not sure
By: Ron Pastorino (Ronpast)
2017-03-21 18:23:22 CDT (-0400)

about the darkening with age but based on the photos, the disc does seem to darken and get larger with age.
It appears close to your A. coprinopsoides with the long deep striations.

In the overlap area (1412 characters) …
By: R. E. Tulloss (ret)
2017-03-21 17:45:56 CDT (-0400)

…the nrLSU from the voucher material is identical to that from Alabama material previously studied.

The Alabama sequence completely includes the sequence derived from the present collection and is 77 characters longer on the left hand (5’) end. In the Alabama sequence, one of the characters is ambiguous. However, the corresponding (aligned) character is not ambiguous in the present material.

Very best,

Rod

Do you think this species darkens with age?
By: R. E. Tulloss (ret)
2017-03-21 17:27:04 CDT (-0400)

R

We failed to get an nrITS sequence.
By: R. E. Tulloss (ret)
2017-03-21 17:26:21 CDT (-0400)

R

We have received DNA from this material. More soon.
By: R. E. Tulloss (ret)
2017-03-21 17:22:57 CDT (-0400)

R

Material received.
By: R. E. Tulloss (ret)
2013-06-21 07:12:24 CDT (-0400)

Thank you again, Ron.

The material has been received in good order and is being accessioned.

Very best,

Rod

Thank you, Ron.
By: R. E. Tulloss (ret)
2013-06-14 23:09:54 CDT (-0400)

R

Thanks Rod, sp-T16 does also look
By: Ron Pastorino (Ronpast)
2013-06-14 22:07:24 CDT (-0400)

like a possibility.
I’ll send them in a couple of days.
Ron

Ron,
By: R. E. Tulloss (ret)
2013-06-14 21:22:12 CDT (-0400)

Thanks for posting this observation with the micro detail.

For persons not familiar with the regional checklist to which Ron refers, it can be found here:

http://www.amanitaceae.org?US+-+TX+and+Gulf+Coast

I think there are a couple of other possibilities for an ID because of spore size variation and the small samples sizes for spores measurements of some taxa in the thecklist.

I’m very interested in the species of sect. Vaginatae so I tried to get some data on as many apparently different species as possible; however, I haven’t been able collect enough data to bring the sample sizes up to where I would prefer to have them.

I think that sp-V01 and sp-T16 might also be possibilities in addition to sp-T33. The macroscopic appearance of sp-T16 is especially similar to the appearance of the mushrooms in your photos.

I’d very much like to see your material if that’s possible.

very best,

Rod