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When: 2017-08-20

Collection location: Lake John, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

Specimen available

Images

Copyright © 2018 Linas Kudzma
Some nice microscopy courtesy of Linas Kudzma.

Proposed Names

58% (2)
Recognized by sight
Based on microscopic features: angular spores

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= Observer’s choice
= Current consensus

Comments

Add Comment
Broke off a tiny piece of cap…
By: Dave W (Dave W)
2017-10-07 01:23:04 CST (+0800)

in search of spores. Found enough entolomoid spores (angular) to at least be convinced these belong within the Entolomataceae. Spores I observed were uniguttulate in KOH or KOH/Congo red mix. Except for depressions near the hilar appendages, the spores well approximated 6-7 sided inequilateral polygons.

Small size and hairy caps match Pouzarella. The most commonly documented species that resembles these appears to be nodospora. But the stipe of nodospora has densely distributed dark fibrils, and more importantly large spores (lengths 13-16 microns). The spores obtained from this collection have lengths ~9 microns (I found only a few using my old scope). Stipes for this observation lack the dark scales, but they are finely pubescent (whitish hairs seen only faintly in zoom).

I think there’s enough here to support “Pouzarella” (at a low level of confidence). This material will eventually be passed along to someone whose abilities to perform microscopy well surpass my own (not to mention the capability to extract/analyze molecular data. So, maybe we’ll eventually find out if these represent Pouzarella.

I agree.
By: Dave W (Dave W)
2017-08-30 02:10:33 CST (+0800)

I think I remember viewing angular spores. But I can’t find any photos. I was looking at a lot of mushrooms at the time. So I proposed Pouzarella at a low level of confidence. I’m pretty sure I preserved this material. I save my Entolomas for a friend who is interested in studying them. But I suppose I could break off a tiny piece of cap and look for some spores.

What other micro-characters would be of interest?

Not too many people can identify Pouzarella
By: Oluna & Adolf Ceska (aceska@telus.net)
2017-08-29 20:53:14 CST (+0800)

without having seen spores. Fungi would be a better guess.