Observation 120260: Chroogomphus vinicolor (Peck) O.K. Mill.

When: 2012-12-16

Collection location: Grizzly Peak Blvd., Berkeley, California, USA [Click for map]

Who: Richard Sullivan (enchplant)

No specimen available

This seemed way paler than any Chroogomphus I had seen before. Even in the same area the other ones showed darker markings on the gills and stem.
Spore print was pale grey. The cap was dry not glutinous.
Cystidia on cell walls were very prominent -but how you can tell the difference between thick walled and thin walled beats me. (Gomphidius roseus has the same spore size range.)
Spore size was 7-8µm x 17-21µm, spindle shaped.
measured 10 spores

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
This has thick cell walls…
By: Nathan Wilson (nathan)
2013-11-19 02:26:35 GMT (+0000)

If you can clearly see the separate sides of the cell wall then I consider that thick enough to count as C. vinicolor.

Thanks Elsa,
By: Richard Sullivan (enchplant)
2012-12-17 13:20:54 GMT (+0000)

I just thought this one looked different to the regular vinicolor, but it turns out that everything points to vinicolor, spore size and then the cystidia are thick walled. I’m no expert- just exploring this stuff cos it is fun!
KOH is pretty easy to get at science websites – You can also use lye I think – but in this case it doesn’t distinguish anything.

By: Elsa (pinknailsgirl)
2012-12-17 13:14:43 GMT (+0000)

I’m not such expert as you, and I don’t have the means too. One thing I can say, it’s very difficult, at least by sight, to distinguish the species of Chroogomphus. Wish I had a KOH solution, I don’t know how to find it here, any clues? Is it expensive?

Chroogomphus ochraceus
By: Elsa (pinknailsgirl)
2012-12-17 12:41:41 GMT (+0000)

“Pale orange flesh, a black spore print, gills that run down the stem, and cap that usually develops purplish red shades by maturity are the visible features that define this attractive species of Chroogomphus. Unfortunately for those who really care, the very similar Chroogomphus rutilus shares—or can share—these features. The cap color is so variable in both species that the best that can be said is that Chroogomphus vinicolor, as its Latin name suggests, is usually wine colored, while Chroogomphus rutilus is often more yellow or brown.

Add to this confusion the fact that North American versions of “Chroogomphus rutilus” turn out to be quite distinct, genetically, from European versions—but genetically identical to Chroogomphus ochraceus (a species described from North America as having yellower colors but apparently varying to purplish red), necessitating a name change from rutilus to ochraceus on our continent. Ultimately, it is the thickness of the walls of the cystidia that appears to separate the two species morphologically; Chroogomphus vinicolor has thick-walled cystidia (the walls reach 5-7.5 µ at their widest points), while Chroogomphus rutilus ochraceus has thin-walled cystidia." (http://www.mushroomexpert.com/chroogomphus_vinicolor.html)

Looking at the photo,here I would call it Chroogomphus rutilus, in north america the name is Chroogomphus ochraceus.

Created: 2012-12-17 12:31:02 GMT (+0000)
Last modified: 2013-01-07 15:43:52 GMT (+0000)
Viewed: 79 times, last viewed: 2018-04-19 00:59:31 BST (+0100)
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