Observation 99923: Psathyrella (Fr.) Quél.
When: 2012-07-08
No herbarium specimen

Notes: Found near Sunset Highway Rest Area. Growing solitary on a small fallen alder branch.

Cap 6 cm across. Stem hollow, fragile. Spore print dark brown. Spores 7-7.5 × 4-4.5 microns. Cheilocystidia 55 × 15 microns.

Doesn’t seem to be any of the white-haired Psaths in MatchMaker and Fungi of Switzerland. (Haven’t tried any keys.)

Proposed Names

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No luck
By: Sava Krstic (sava)
2012-07-12 01:37:21 CDT (-0400)

I tried the Smith book. Subsection Subacutae seems right. Within it, we are “On wood of hardwoods”, which points to key locations 16-21. However, every species description in this group has something that doesn’t match well.

Smith monograph
By: Byrain
2012-07-11 13:06:06 CDT (-0400)

Its freely available online, here’s a link.


I would try keying this out in Subsection Subacutae, which is page 148 in the book and 152 in my pdf. I suspect this would be easier to key with a specimen in hand.

By: Sava Krstic (sava)
2012-07-11 02:17:42 CDT (-0400)

… look much like the cheilocystidia and are about 50 microns long. Two photos added.

Byrain, I don’t have the Smith monograph and so cannot really follow your ID attempts. But thanks a lot!

Pleurocystidia details?
By: Byrain
2012-07-10 17:21:53 CDT (-0400)

I tried keying it out, this definitely needs more pleurocystidia details like shape to proceed. I think Subgenus Pannucia Section Appendiculatae in the Smith book looks promising.

Here is where I get stuck, in the Appendiculatae key.

3. Pleurocystidia utriform or fusoid-ventricose and with the apex broadly rounded.
subsect. Largae.
3. Pleurocystidia nine-pin-shaped to obtuse to acute. subsect. Subacutae.

By: Sava Krstic (sava)
2012-07-10 17:06:22 CDT (-0400)

Thans, Byrain.

I saw pleurocystidia on the cross-section that I made to look at the
pileipellis, but I didn’t take a picture of them. Will see if I can do it

By: Byrain
2012-07-10 09:26:38 CDT (-0400)

Absent, present? This is important for Psathyrella identification, please record it in the notes. :)

Created: 2012-07-10 03:14:17 CDT (-0400)
Last modified: 2013-03-16 22:35:43 CDT (-0400)
Viewed: 181 times, last viewed: 2016-08-30 19:36:00 CDT (-0400)
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