Observation 83001: Lactarius californiensis Hesler & A.H. Sm.

When: 2011-11-19

Collection location: Salt Point State Park, Sonoma Co., California, USA [Click for map]

Who: Debbie Viess (amanitarita)

Specimen available

brought into the BAMS foray.

Species Lists



Proposed Names

-14% (2)
Recognized by sight: super slimy cap, viscid but drying stipe, white acrid latex, gills turn purple when damaged.
61% (2)
Eye3 Eyes3
Recognized by sight: as per Irene’s suggestion.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Douglas Smith (douglas)
2011-11-24 00:28:41 WIB (+0700)

What are the features that we should look for to be able to split L. californiensis from L. pallescens? Are there any posted obs. here that we can trust for comparison, or can you post some from PNW? Are there good sources on the differences here? It would be good to get things down to describe the differences. L. californiensis was desc. from Jackson St. Forest, but with just that one sample, and it isn’t the best description, it would be good to flesh out what Smith left only partly done there…

By: Noah Siegel (Noah)
2011-11-23 23:34:32 WIB (+0700)

This common Lactarius was described from Jackson State Forest, quite distinctive yet sorely misidentified again and again… I have never seen L. pallescens in CA, it’s real common up in WA under conifers (californiensis seems to be a Tanoak associate) There are a couple of other purple staining Lactarius in this group in CA; Lactarius uvidus var. montanus and as far as I can tell an undescribed species with a dry zonate cap and yellow KOH reaction.

so, since I actually still have this…
By: Debbie Viess (amanitarita)
2011-11-23 23:01:02 WIB (+0700)

how do we (or can we) nail this ID???

By: Douglas Smith (douglas)
2011-11-23 07:25:19 WIB (+0700)

I think people are coming to consensus that in California, there seems to be one common purple staining Lactarius. Not sure if there is more evidence for more than one, unless someone wants to point that out? And that this common purple staining Lactarius should either be named L. pallescens or L. californiensis.

Personally I’d like to see more obs. with more details, matching that to literature before I’d decide. I think there are many that think people should just go with L. californiensis.

One of things used for these purple staining Lactarius is KOH on the cap, and if that turns green. So, that is something for people to try and record in further obs. of these… Saw a bunch in Albion this past weekend, don’t think anyone put KOH on them.

no birch.
By: Debbie Viess (amanitarita)
2011-11-23 01:22:17 WIB (+0700)

thanks for the ID correction.

By: Irene Andersson (irenea)
2011-11-22 16:32:39 WIB (+0700)

introduced with birch, I doubt that you have uvidus here. Maybe californiensis?

Created: 2011-11-22 10:40:20 WIB (+0700)
Last modified: 2012-02-17 02:28:36 WIB (+0700)
Viewed: 87 times, last viewed: 2017-06-10 16:04:49 WIB (+0700)
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