Observation 188395: Panaeolus castaneifolius (Murr.) A.H. Sm.

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I don’t think so.
By: Byrain
2014-11-19 15:48:41 MST (-0700)

I have seen oil drops in dried material before, but that was when I was very new to microscopy and did not take good pictures. I have that collection still and will get back to it eventually. Everything I have scoped and documented well has had no oil drops in either H2O, KOH, fresh or dried. You could also measure the epicutis cells, there is supposed to be a difference in size. Gerhardt wrote that he was sure they were different, but that more work needs to be done to document the differences.

Is it possible that tissue being dried
By: Jacob Kalichman (Pulk)
2014-11-19 15:39:50 MST (-0700)

reduces oil drops?

So…
By: Byrain
2014-11-19 15:21:39 MST (-0700)

Most spores without oil-drops, seems to match P. castaneifolius which is common in CA in my experience, only the question remains if that species is the same as P. foenisecii or not…

re: key
By: Jacob Kalichman (Pulk)
2014-11-19 11:21:44 MST (-0700)

I saw that on a few other posts yesterday…
(assuming it’s a good distinction between species —)
I couldn’t tell about the basidia, maybe the material needed more hydration, 0 – 10% <4-spored basidia.
I found one or two spores with 2 oil drops.
Still don’t have a microyardstick.

Panaeolina key.
By: Byrain
2014-11-19 07:34:25 MST (-0700)

Key: Species of the genus Panaeolina
1 Spores normally with 1 to 2 big oildrops (also at
exsiccatum); nearly cosmopolitan species
……………………………….. Panaeolina foenisecii (30)
- Spores normally without oildrops ………………………… 2
2 Breadth of spores not more than 10 Lim, ornamenta
tion like foenisecii; basidia constantly 4-spored; robust
Northamerican species Panaeolina castaneifolia (31)
- Breadth of spores up to 12 Lim, ornamentation more
coarsely as foenisecii; basidia 1- to 4-spored; Indian
species …………………………….. Panaeolina indica (32)

Created: 2014-11-14 03:32:08 MST (-0700)
Last modified: 2014-11-19 15:37:06 MST (-0700)
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