Observation 117473: Psathyrella longistriata (Murrill) A.H. Sm.
When: 2012-11-20
No herbarium specimen

Proposed Names

55% (1)
Recognized by sight: Something close to P. longistriata, need more info for a good id, check the taste, smell, and also what color the annulus dries.
Based on microscopic features: Check the spores, cheilocystidia, and pleurocystidia (or their absence).
84% (3)
Eye3 Eyes3
Recognized by sight: cap color dies to buff olive yellow.
Taste and smell non distinctive
Based on microscopic features: spores = 9.5 × 5.5
Cheilocystidia: rare, but present
Pleurocystidia: common/abundant
Basidioles: ballon shaped, short and fat.
Basidia: 4 spored
Pileocystidia: none
Caulocystidia: none
Based on chemical features: KOH=black on cap and black on gills no coloration on stipe.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Caleb Brown (Caleb Brown)
2012-11-23 21:48:40 CST (-0500)

I thought so,
I will most surely add comments under each micrograph.

By: Byrain
2012-11-23 03:33:59 CST (-0500)

Nice to see another Psathyrella longistriata observation with microscopy!

And concerning the labeling the micrographs, I think you might have labeled your pictures correctly, but the image file name is something which is visible only to you. :) If you add this information to the image notes field, everyone can see.

By: Caleb Brown (Caleb Brown)
2012-11-23 02:44:57 CST (-0500)

The annulus dired a pale whitish color.
The spores I will have to measure later.
As for labeling my micrographs, im not sure what you mean? I have the name there under each picture, are you wanting me to show the cystidia I am talking about?
Most of the time I measure them so you will know which ones i’m looking at.

Looks good… (Edited)
By: Byrain
2012-11-22 01:57:50 CST (-0500)

But it would help to have a few more details, What color does the annulus dry? Can you measure 20 spores for a better idea of the range? Spore size is an important feature for Psathyrella, the spores you measured are on the upper range for P. longistriata.

Also, what are you mounting your sections in? The pleurocystidia should be without thickened and/or yellowish walls in KOH.

Edit: Smith claims pileocystidia is not an important feature for Psathyrella, P. longistriata should have abundant caulocystidia, and the cheilocystidia will be small and inconspicuous. http://mushroomobserver.org/image/show_image/230831?obs=68403&q=rf2z

Edit: Missed taste and smell info…non-distinctive is good for P. longistriata.

Edit: Played with the key a bunch, I think I can eliminate all the species except P. longistriata which matches well.

Try the keys in North American Species of Psathyrella
By: Byrain
2012-11-22 01:41:14 CST (-0500)


Can you label your micrographs? Especially the cystidia.

By: Caleb Brown (Caleb Brown)
2012-11-22 01:37:36 CST (-0500)

I was looking at Psathyrella of the PNW and there are no other significant psathyrella with annulus and striations growing in the fall… It fits the microscopic details of P. longistriata so i know its that, but what other species are similar? I couldn’t find any look alikes…

Im going to go back today.
By: Caleb Brown (Caleb Brown)
2012-11-21 15:02:22 CST (-0500)

Ganna scope these and clear up the confusion with the chlorophyllum =)

By: Rocky Houghtby
2012-11-20 22:52:13 CST (-0500)

Carries something like 9 tackle boxes… Lol.

Nice find Caleb. I am ALWAYS on the lookout for skirted Psathyrella.

Always carry extra tackleboxes! :)
By: Byrain
2012-11-20 22:36:27 CST (-0500)

P. longistriata is a common member in this group and these look like them, however there are other choices. Save these in the future, I’ll look at them if you want assuming there are good pictures and at least a few specimens.

By: Caleb Brown (Caleb Brown)
2012-11-20 22:28:27 CST (-0500)

Thats what i meant, not longipes but longistriata.. I think you believe me given the similar names and the former not even having a veil. stupid me…
I wish I could do a microscopy but they are long gone, i need a tackle box, i only have two or three little containers with me and they were full already.

Created: 2012-11-20 22:03:50 CST (-0500)
Last modified: 2012-11-22 02:45:34 CST (-0500)
Viewed: 149 times, last viewed: 2016-10-23 08:18:08 CDT (-0400)
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