Notes:
These were found in mixed woods in the Big Sandy Creek Unit.
Caps up to 3.7 cm across.
Spore print white and spores amyloid.
Spores ~ 6.0-8.5 X 4.3-5.5 microns, mostly ellipsoid(Qavg = 1.41) and smooth.
A. elongata seems to fit but apparently rare in this area(?)

Images

Spores in Melzers @ 1000X.

Proposed Names

2% (2)
Recognized by sight
41% (3)
Used references: spores smaller than A. elongata
-9% (3)
Recognized by sight: Specimen on the left (2nd photo) shows a small area of reddish-brown stain on the basal bulb.
Based on microscopic features: Spores are small for flavorubens.

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= Observer’s choice
= Current consensus

Comments

Add Comment
Thanks, Alan.
By: R. E. Tulloss (ret)
2017-06-26 23:49:08 CDT (-0400)

I appreciate knowing how the posting could be done.

Very best,

Rod

Erlon, Hello.
By: R. E. Tulloss (ret)
2017-06-26 23:47:00 CDT (-0400)

I usually end up removing the Jenkins type-study measurements from the sporograph. Pretty much across the board (especially for the Murrill types) the spore data fits into a lower left hand corner of the sporograph from fresh material. My impression is that years of poor presveration before the FLAS herbarium was updated, air-conditioned, and protected against insects has resulted in collapsed spores and spores that are hard to rehydrate. It is possiblle to selectively remove sporographs if you desire to do so. When its 100 spores from well preserved material vs. 20 spores from poorly preserved material, I examined the complete sporograph, but then remove the meaurements from poorly preserved collections.

Very best,

Rod

I’d be inclined to put more weight
By: Ron Pastorino (Ronpast)
2017-06-26 22:46:43 CDT (-0400)

on macro characteristics in this case.
I only took 13 spore measurements and there is quite a bit of overlap on the spore sizes, especially for the A elongata and the A flavivolva.

Adding the sporograph in comments
By: Alan Rockefeller (Alan Rockefeller)
2017-06-26 20:44:52 CDT (-0400)

Images can be added to comments by people who didn’t create the observation – the best way to do is is to upload the image to an external image host that has permanent URL’s like imgur. Then the imgur direct image URL can be added to the comment between exclamation points. Works well for posting things like sporographs and phylogenetic trees.

Adding the sporograph in comments
By: Alan Rockefeller (Alan Rockefeller)
2017-06-26 20:44:48 CDT (-0400)

Images can be added to comments by people who didn’t create the observation – the best way to do is is to upload the image to an external image host that has permanent URL’s like imgur. Then the imgur direct image URL can be added to the comment between exclamation points. Works well for posting things like sporographs and phylogenetic trees.

A sporograph comparison of the present set of spore measurements with those… <<EDITED
By: R. E. Tulloss (ret)
2017-06-26 20:29:27 CDT (-0400)

…0f flavivolva, elongata, and flavoconia show that none of the measurements for these taxa match very well in the present case.

Very best,

Rod

Created: 2017-06-24 17:30:45 CDT (-0400)
Last modified: 2018-01-06 11:26:30 CST (-0500)
Viewed: 134 times, last viewed: 2019-09-19 19:07:39 CDT (-0400)
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