Observation 98676: Amanita “sp-T45” Tulloss nom. prov.
When: 2012-06-22
Herbarium specimen reported

Notes: These were growing in the southern portion of the Big Sandy creek Unit.
They were rather small and delicate with caps up to 3.1 cm across.
The volva was very thin and fragile.
Spores were inamyloid and ~ 8.7-11.6 X 6.1-8.9 microns. Q(ave.) = 1.37.

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A species page has been created for Amanita sp-T45
By: R. E. Tulloss (ret)
2012-07-06 15:07:52 CDT (-0400)

on the WAO site. Spores measurements are underway. The species has been added to the group under section Amanita on the Texas and Gulf Coast checklist…bringing the species count for that list to 103.

Thanks once again to Ron.

R

Just came back out of the herbarium (where my dissecting scope is located) and…
By: R. E. Tulloss (ret)
2012-07-06 10:14:57 CDT (-0400)

there are definitely small subnapiform to subventricose bulbs at the bases of the stems. So this species belongs in sect. Amanita. It is a little reminiscent of multisquamosa, although the orangy and olivaceous (or grayish) tints to the disc pigmentation are not seen in multisquamosa; and, also, there is no partial veil on any of your material (per photos). So…something new perhaps.

David L. tells me that they’ve been getting no rain in east Texas; but you must have hit a good weather window.

Cool stuff.

Very best,

Rod

Rod, the two GPS readings are a result
By: Ron Pastorino (Ronpast)
2012-07-06 09:57:35 CDT (-0400)

of having found 2 groups of three of this collection.
I initially found three and shortly later found another three. When I realized they were the same species and that they were growing close together(as indicated by the readings) , I combined them and discarded the ones that were not in decent shape. The photos represent a combination also.
When I collected them, I did initially feel that they had a very small bulb. It was difficult to extract them from the sandy soil cleanly as they were very fragile and also the sand tended to adhere to the base of the stipe.

Ron, do you think there could be a bulb at the base of the stipe
By: R. E. Tulloss (ret)
2012-07-06 09:28:45 CDT (-0400)

…in these amanitas?

R

Thank you, Ron. [edit]
By: R. E. Tulloss (ret)
2012-07-06 09:01:48 CDT (-0400)

The dried material of this collection arrived yesterday afternoon. Can you explain the two lat./long. readings that are on the bottom of your collecting form? Thanks in advance.

The cryptonom. temp. assigned to this species is Amanita sp-T45. The herbarium accession number for the collection is 502-10.

Very best,

Rod

Ron [edited]
By: R. E. Tulloss (ret)
2012-06-30 18:06:26 CDT (-0400)

I examined sp-T32 and measured its spores, which are dominantly elongate, despite its being represented by an overmature specimen in the only known collection. It should be compared with A. cokeriana, a poorly known species thought to belong in the section Caesareae. So I think I gave you two bum steers in the comments below.

At this point, I’m thinking that I’ve probably never encountered the species in your pictures.

Thanks for agreeing to send me the collection. I look forward to receiving it.

Very best,

Rod

Another possibility is sp-T32
By: R. E. Tulloss (ret)
2012-06-29 23:53:19 CDT (-0400)

for which, unfortunately, I do not yet have spore data.

Rod

I’m suggesting sp-T36
By: R. E. Tulloss (ret)
2012-06-29 23:38:15 CDT (-0400)

It is extremely similar in form and color and is known to occur in the Big Thicket area of east Texas. The on-line description on WAO is based on four collections, several of which I saw in fresh condition. The spores of my material had lower avg. Q, however.

I’d be interested to see your dried material, Ron.

Very best,

Rod

Created: 2012-06-29 20:42:42 CDT (-0400)
Last modified: 2012-07-06 11:37:49 CDT (-0400)
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