Observation 6752: Camarophyllus pratensis (Pers.) P. Kumm.

When: 2008-02-10

Collection location: Los Trancos Preserve, Palo Alto, California, USA [Click for map]

Who: Douglas Smith (douglas)

Specimen available

Getting back to this one, to use as a comparison to other Camarophyllus species, and adding some micro-shots.

The first micro-shot is of a gill section, at 100x in KOH. Here it can clearly be seen the interwoven lamellar trama between the rows of basidia, so clearly a Camarophyllus species. The next micro-shot is of a very thin gill section at 400x in KOH. And here you can see the elongated basidia of Hygrophorus species, a row of connective cells, and again the interwoven trama, this shot doesn’t really point out anything for the id, but I thought it was a pretty good looking section. The third micro-shot is of tissue from the upper stipe surface, to look for mature spore sizes. Unfortunately I couldn’t find a spot with lots of spores in focus at once, so only two spore here. This is at 1000x in KOH, and I still can’t quite get 1000x in focus in camera yet.
But here the spores have on oil drop in them, and are elliptical.

The ave spore sizes are : 7.06 × 5.77 microns – q : 1.23, on 7 spores. But I haven’t really calibrated the scope’s reticule yet, and I think this might be high.

Anyway, here is a baseline for a well known Camarophyllus species. One thing I learned with inamyloid, non-dextrinoid, hyline stuff, don’t just use KOH… next time on Hygrophorus, use the Congo Red first…

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Add Comment
I’m with Deb; skinny is a variant.
By: Debbie Viess (amanitarita)
2008-02-12 17:48:03 CST (-0500)

I have also seen both skinny and fat versions, but the skinny was unusual enough to me at the time that I illustrated the difference. I will photograph it and post it.

Skinny not unusual here
By: Debbie Drechsler (debdrex)
2008-02-12 10:30:05 CST (-0500)

Small, slender specimens are the norm, or were until this season, at the park (Howarth)where I frequently find C. pratensis.

Sure does look skinny!
By: Dimitar Bojantchev (dimitar)
2008-02-12 02:42:11 CST (-0500)

Otherwise it looks right colorwise…

Seems a bit skinny…
By: Nathan Wilson (nathan)
2008-02-12 01:36:51 CST (-0500)

Was it growing in deep duff? I’m used to this species been more stout.

Created: 2008-02-12 00:38:53 CST (-0500)
Last modified: 2008-03-06 16:15:33 CST (-0500)
Viewed: 43 times, last viewed: 2018-01-23 19:22:01 CST (-0500)