Observation 18621: Russula Pers.
When: 2009-02-08
Herbarium specimen reported

Notes: Odor mild, taste mild.
Cystidia clindrico-clavate. 30 μm long.
Cheilocystidia mucronate. 20 μm long.
Basidia large, long sterigmata. Base 48 μm long, sterigmata 19-20 μm long.
Pileocystidia dark purplish-vinaceous in sulphovanillin (not grey or blue-gray, so perhaps this doesn’t count as a positive reaction). 61-73 μm long.
Spores 8.5 × 6.7 μm. Small spines, nearly complete reticulum.
Under Quercus agrifolia.

Images

36920
Copyright © 2009 Christian F. Schwarz
36921
Copyright © 2009 Christian F. Schwarz
36922
Copyright © 2009 Christian F. Schwarz
Pileocystidia in sulphovanillin.
36923
Copyright © 2009 Christian F. Schwarz

Proposed Names

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Eye3 Eyes3
Recognized by sight

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Comments

Add Comment
technique
By: Christian (Christian Schwarz)
2009-02-21 02:28:15 CST (-0500)

Mostly, I have my equipment to thank. In turn, I have my professor and the University to thank.

The only other methodology I use that might make a difference is that I often make sections vertically from a SINGLE gill laying face-side down – not from a “wedge” of cap and gill tissue as some suggest. Also, I make sections using a very powerful dissecting scope (also from Nikon), and use the thinnest available cover glass.

scope
By: Alan Rockefeller (Alan Rockefeller)
2009-02-20 23:29:17 CST (-0500)

I have a picture of the nice Nikon scope he uses here. This picture also includes a pic of the key to the lab but I reduced the resolution enough that the key can not be duplicated from the image. I am also curious how this image was made, the gill face looks so clean and visible, almost like it was made with something more like a stereo zoom microscope. Sometimes I can see cool stuff like this when I look at a gill face but usually it looks more like a blurry mass of cells.

Spectacular micro-photo (36923)
By: Dimitar Bojantchev (dimitar)
2009-02-20 22:25:44 CST (-0500)

Very high resolution and very clean photo 36923. Please share the
equipment and technique.

With this high resolution you can give us some more
magnification/zoom.

Amongst other things, the spores really look like something in the
emetica Section — silvicola/cremoricolor, in our area…

D.
Slide and Russula Gallery
By: Christian (Christian Schwarz)
2009-02-19 00:38:58 CST (-0500)

I’m not sure exactly what you are asking, but it is a lamellar fragment mounted in Melzer’s.

As for Mike Davis, I heard him speak at the FFSC meeting – I find that the “Russula Gallery” is a great first step, but currently of limited utility. The main usability problem is the poor choice of page-by-page formatting. Even working around this, there is a problem with inconsistent reporting of characteristics. Some entries say SV-, some say SV+, and some do not report SV reaction at all, etc…

Spore background?
By: Darvin DeShazer (darv)
2009-02-18 21:54:25 CST (-0500)

What kind of a slide is the photo of the spores taken on? What is the background?
Russula photos from CA:
Davis Lab-DNA verified

Created: 2009-02-18 20:46:49 CST (-0500)
Last modified: 2010-12-09 14:53:55 CST (-0500)
Viewed: 89 times, last viewed: 2016-06-22 00:10:36 CDT (-0400)