Observation 50546: Russula claroflava Grove. ss. Melz, & Zv., J. Schff.

When: 2010-08-11

Collection location: Fraser Experimental Forest, Grand Co., Colorado, USA [Click for map]

Who: Ron Pastorino (Ronpast)

No specimen available

I believe these(or ones very similar) were identified as Russula declorans at the 50th NAMA Foray.
The problem I have is that the cap color is very yellow and seems to lack the orangy tints for this species. Also the spore print is very ocher and almost bright orange in thick mass. Most references note a pale yellow or pale ocher in one case. All the other yellow capped Russulas that i could find also seem to have lighter colored spores.
The spore size does seem to fir in on the lower end of the range for this species. I got an average of ~ 9.2 X 7.4 microns.
I didn’t really look for the flesh turning gray feature.

Species Lists



Proposed Names

29% (1)
Recognized by sight
62% (3)
Recognized by sight: bright yellow cap, spore deposit ochre (darker than decolorans)
Based on microscopic features: spores with spiny warts, 8-9,5 × 6,5-7,5 microns, warts 0,5-1 micron

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks Irene
By: Ron Pastorino (Ronpast)
2010-08-18 11:33:37 -03 (-0300)

While birch was not evident in the area, there well could have been a stray. Mostly conifers and a sprinkle of aspens.
Don’t remember why I passed over R. claroflava the first time…my brain goes a little dead when I try to ID Russulas.

By: Irene Andersson (irenea)
2010-08-18 03:48:22 -03 (-0300)

Any Betula around it?

Created: 2010-08-17 18:22:21 -03 (-0300)
Last modified: 2010-08-22 01:00:26 -03 (-0300)
Viewed: 104 times, last viewed: 2018-07-11 10:14:39 -03 (-0300)
Show Log