Observation 63844: Pluteus hongoi Singer
When: 2007-08-14
Herbarium specimen reported
0 Sequences

I promised some P. cervinus pictures here a while ago and decided I’d look at two more specimens from my collection before posting. Now here’s a little problem – all three turned out to be quite different. Unfortunately I only saved dried cap sections for #1 and #2, so I couldn’t examine their stipes (not that I’d intended to do that initially, because P. cervinus is a role model for BUMs.

1. The first one is a classic (= boring) P. cervinus, except for one thing – some of its paraphyses are bottle-shaped, and the cystidia are a bit too neat I’d say – very little size variation and the “horns” are rather short.

2. The second one is a classic, boring P. cervinus, except that its cap is a bit velvety-looking because of dull-brown tiny squamules; microscopically it has terminal elements with long thin pigmented projections. Its stipe is also dull white with browner, velvety-looking base. Its cheilocystidia are way more numerous and they’re slightly pigmented – see observation 63845.

3. The third one is a classic, boring P. cervinus (lol), dull dingy brown and otherwise plain, growing on a rotting birch log which is also standard. The problem is, there are some clamp connections in the pileipellis and they’re outrageously abundant in the stipe hyphae. The only P. cervinus lookalike allowed to have those is P. pouzarianus, a conifer-loving species, and an obscure taxon from across the ocean. See observation 63846

*4. Since I’ve touched upon this issue there’s yet another “P. cervinus” (tentative ID by several uninterested and tired mycologists) which we collected in Yugra last summer, about 1000 km NW from here, in Midwestern Siberia. It has a shiny, prominently fibrillose dark cap and its stipe is covered with large black scales. I haven’t examined it microscopically yet.

So, Pluteus cf. cervinus #1:

Proposed Names

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Recognized by sight
Based on microscopic features
83% (1)
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Based on microscopic features
Based on chemical features: molecular id

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By: Alan Rockefeller (Alan Rockefeller)
2011-03-26 09:39:05 PDT (-0700)

Great pictures.

By: Christian (Christian Schwarz)
2011-03-26 09:01:20 PDT (-0700)

This is the gold standard for micro-feature illustration.
Great, great work.

Thanks :)
By: Tatiana Bulyonkova (ressaure)
2011-03-26 08:51:10 PDT (-0700)

I used Corel Draw to trace the microphotos by hand (Polyline + node manipulations) and color them (Transparency, Fill, Drop shadow functions), so there’s no secret special automated software… unfortunately :(

By: jimmiev
2011-03-23 21:55:02 PDT (-0700)

how did you make the diagrams?

great work

Oops! :)
By: Tatiana Bulyonkova (ressaure)
2011-02-25 23:28:23 PST (-0800)

Interesting, I remember setting the correct date for the first two images but I didn’t set it for the rest (micro, I mean) which I added in 2 batches. Will fix :)

By: forestwander
2011-02-25 18:45:31 PST (-0800)

Were these actually collected in February? Novosibirsk is quite cold. I always find these in the summer.

Created: 2011-02-24 05:23:51 PST (-0800)
Last modified: 2017-02-18 04:14:32 PST (-0800)
Viewed: 204 times, last viewed: 2017-10-01 05:31:09 PDT (-0700)
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