Observation 161943: Psathyrella (Fr.) Quél.

These were growing on woody debris either alone or in small clusters of 2-3.
Caps up to 7.5 cm across. The larger ones seemed to develop an unbo probably because the caps are very thin and limp and tend to sag when large.
No signs of a veil.
The stems were also fragile and hollow.
Spore print was purplish brown.
Spores ~ 6.8-11.0 X 4.0-5.9 microns. mostly elongate with a large germ pore.
Q(ave) = 1.81.
Did not see any pleurocystidia.
Cleilocystidia not abundant, narrowly utriform with subclavate apexes and ~ 42-55 X 11-14 microns.


Spores from !st photo fbs in KOH @ 1000X.
Cheilocystidia in Congo red + KOH @ 1000X.
Cheilocystidia in Congo red + KOH @ 1000X.
Cheilocystidia in Congo red + KOH @ 1000X.
Spores from 3rd photo fbs in KOH @ 1000X.

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Add Comment
I guess I misunderstood.
By: Ron Pastorino (Ronpast)
2014-03-22 21:26:51 PDT (-0700)

Also, I was in a hurry and the number in my last comment was the Q(range).
I did do two sets of measurements on these as I wasn’t sure each collection pictured were identical species. They were growing several meters apart. In total I made 29 measurments(!4 + 15).
In terms of Q(ave), one was 1.79 and Q(range) was 1.65-2.04 and the other was Q(ave) = 1.83; Q(range) = 1.64-2.04.

By: Byrain
2014-03-22 15:58:49 PDT (-0700)

I see the spore range & Q average only.

The spore averages are in the notes.
By: Ron Pastorino (Ronpast)
2014-03-22 15:50:28 PDT (-0700)

The Q(range) = 1.64-2.04.
I did quickly scan the Candolleana section but nothing appeared to match(?).

Can you share the spore average?
By: Byrain
2014-03-22 15:40:46 PDT (-0700)

I think this should end up in subgenus Candolleana section Candolleana, or in other words the P. candolleana group, its kind of hard to key out from just photos. I’ll try more later.

Created: 2014-03-22 15:28:43 PDT (-0700)
Last modified: 2014-03-22 21:29:12 PDT (-0700)
Viewed: 39 times, last viewed: 2019-07-11 16:29:12 PDT (-0700)
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