Observation 99135: Amanita stirps Crocea
When: 2012-06-23
Herbarium specimen reported

Notes: These were found in the Big Sandy Creek Unit.
Caps were up to 5 cm across with striations up to 7 mm.
White inamyloid spores were ~ 7.8-10.5 X 7.0-10.0 microns.
Q(ave.) = 1.09. However, the variability was fairly high with the Q ranging from 1.02-1.25.
The closest match could be Rod Tulloss’s sp-T37, based simply on the limited info on the website.

Proposed Names

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
The sporograph match with americrocea could be distorted by a few large spores…
By: R. E. Tulloss (ret)
2012-07-05 16:56:10 PDT (-0700)

from a single collection (I looked back at the original data). I’d have to say
that both americrocea and pseudocrocea are candidates. Maybe these two and sp-T37 should all three be examined more closely to see how much they all have in common. It could be that there are less than three species here…when I get material with varying levels of supportive detail from different geographic areas, it is possible that I will generate too many provisional names and/or numbers. It has happened before.

We’ll look into these three.

Very best,

Rod

Rod, in looking over your
By: Ron Pastorino (Ronpast)
2012-07-05 08:43:49 PDT (-0700)

Amanita americrocea, these look pretty close, both in color and spore size, and also down to the yellowish fibrils on the stipe.
http://www.amanitaceae.org/?Amanita+americrocea

Amanita pseudocrocea is kind of close to T37 in terms of spore size and shape. [edit]
By: R. E. Tulloss (ret)
2012-07-05 08:16:57 PDT (-0700)

And they both have the rather small volval sack remnant at the stem’s base. Interesting. The range reported for pseudocrocea runs from Ohio, Kentucky, and Arkansas to the neovolcanic zone of central Mexico. Maybe….

Ron’s material will add data. I heard from Ron this morning that he was sending material of the collection that vouchers this observation.

R

Yes, quite pretty.
By: R. E. Tulloss (ret)
2012-07-05 08:09:13 PDT (-0700)

The strong orange component in the youngest specimen reminds me of one of “crocea-look-alikes” in North America…I should compare the sporographs with T37 and report back.

R

Cool species!
By: Christian (Christian Schwarz)
2012-07-04 14:04:45 PDT (-0700)
Ron, thank you for posting this.
By: R. E. Tulloss (ret)
2012-07-04 13:25:51 PDT (-0700)

I agree with your assessment vis-a-vis the Texas-Gulf Coast checklist — T37; however, I have never seen that species in fresh condition. The spore data was worked up from a single collection given to me by David Lewis. The collection number of David’s is cited on the ?Amanita+sp-T37 page of the WAO site and (probably) in the checklist. I may have already asked him about a photo, but that should be done again…just in case he has one that I don’t have.

It’s very cool that you might have collected this again.

I doubly thank you for posting because I found that T37 was not included in the spore measurement table of the checklist. An oversight that I hope I have now corrected. When there’s only a little data, it’s a shame if it’s not provided in all the possibly useful permutations.

I’d like to take a look at your material when you have an opportunity to send some.

For those trying to follow what we’re talking about, the checklist (updated today) is here:

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

Very best,

Rod

Created: 2012-07-04 09:05:50 PDT (-0700)
Last modified: 2015-08-27 14:41:30 PDT (-0700)
Viewed: 129 times, last viewed: 2016-11-08 21:33:40 PST (-0800)
Show Log