Observation 90526: Psathyrella (Fr.) Quél.
When: 2012-03-03
Who: Byrain
No herbarium specimen

Notes: Growing from the ground underneath the side of an oak log.
Both the taste and smell are mild, the stem base discolors little to none. It had remnants of a slight/evanescent veil on the cap margin.

The spores are smooth with a germ pore.
Spore range = (8) 8.5 – 10 × 4 – 6 μ
Average spore = 9.27 × 5.02 μ
Average Q = 1.86
30 spores measured.

Pleurocystidia measurements – 45×16, 47×17, 49×14, 50×13, 55×15 μ
Cheilocystidia measurements – 42×14, 44×14, 47×15, 53×15 μ
Caulocystidia measurements – 51×14, 56×14 μ
All cystidia was similar in shape, with the cheilo and pleuro having yellowish walls in KOH.
The basidia were 4-spored and brachybasidioles were present.

I haven’t been able to key this specimen well, attempting to explore all the options despite not being clear on some parts of the key only brought me a headache and the suspicion that this may not be in North American Species of Psathyrella.

Images

206864
206865
206866
206867
206868
Spores
1000x
Mounted in KOH
206869
Pleurocystidium
1000x
Mounted in KOH
1μ divisions
206870
Cheilocystidium
1000x
Mounted in KOH
1μ divisions
206871
Brachybasidioles
1000x
Mounted in KOH
1μ divisions
206872
Spores
1000x
Mounted in KOH
1μ divisions
206873
Pileipellis
1000x
Mounted in KOH
1μ divisions
206874
In KOH
206875
Caulocystidium
1000x
Mounted in melzers
1μ divisions
206876
Spores on the stipe
1000x
Mounted in melzers
1μ divisions

Proposed Names

85% (1)
Eye3 Eyes3
Recognized by sight: subgenus Psathyrella
Used references: North American Species of Psathyrella
Based on microscopic features

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
No one has commented yet.

Created: 2012-03-20 19:12:42 CDT (-0500)
Last modified: 2012-03-20 19:39:34 CDT (-0500)
Viewed: 58 times, last viewed: 2016-09-01 23:59:35 CDT (-0500)
Show Log