Observation 30697: Lactarius deliciosus (L.) Gray
When: 2009-12-20
No herbarium specimen

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Well Irene, I am green with envy over your extensive mushroom knowledge!
By: Debbie Viess (amanitarita)
2009-12-23 11:31:13 AST (-0400)

not to mention your willingness to share same.

Thank you for linking to the various photos on greeening members of the deliciosus group. Courtecuisse (“Mushrooms and Toadstools of Britain and Europe”) concurs with you…the European deliciosus only spots green, unlike our Northern CA forms that can turn perfectly green in the field…kind of unappetizing, really! And we never have the consistantly strongly scrobiculate stipe found in your forms. Altho some can show a bit of this feature…

Lots of variability round the world…and even in our own backyards. Thanks for deepening our discusssions.

Ok, thank you for the clarification
By: Dimitar Bojantchev (dimitar)
2009-12-23 08:33:37 AST (-0400)

The essence of the message is that L. deliciosus does not turn entirely green at age. Just spots greenish occasionally. I interpreted your earlier statement as an assertion of complete absence of greenish staining, which is not the case. Thank you for the clarification.


In my area
By: Irene Andersson (irenea)
2009-12-23 06:15:11 AST (-0400)

Lactarius deliciosus does not turn green – only occasionaly and slightly greyish green, on drying after several hours, and just where it’s cut or bruised. Take a good look at this picture:

Others in this group do regularly turn green, particularly Lactarius semisanguifluus, with its bluish green cap already from the beginning.

Lactarius deterrimus often turns green, but usually just the cap surface.

A highly variable and probably overlooked species(or variety?), usually with duller cap colour, that gets flushes of green also on gills and stem, and appears to be more southern, is Lactarius quieticolor.

And I bet there are other forms existing, not only in other parts of the world, but in Europe too.

Irene, please explain
By: Dimitar Bojantchev (dimitar)
2009-12-22 17:02:45 AST (-0400)

We know that what we call Lactarius deliciosus in California is not at all the real species phylogenetically. But I believe that the combination of carrot milk and greenish discoloration is fundamental for delimiting Section Deliciosi. I do not have my references with me right now, but as far as I remember L. deliciosus does discolor green even in the strictest European sense. As well as deterrimus and others in that Section.

By: Andreas Gminder (mollisia)
2009-12-22 16:51:01 AST (-0400)

Of course Lactarius deliciosus becomes green! In fact it is the one where the milk becomes not dark red but green within some hours, and all other parts stain green too. Lactarius salmonicolor is the one that don’t becomes green.

best regards,

By: Irene Andersson (irenea)
2009-12-22 14:12:52 AST (-0400)

Still a member of the Lactarius deliciosus group. Lactarius deliciosus does not become green.

Good !
By: Johannes Harnisch (Johann Harnisch)
2009-12-22 14:01:52 AST (-0400)

that is nice… so we can be sure that this one is a Lactarius deliciosus for a change, was the stalk scrobiculate ?

Monterey Pine
By: Darvin DeShazer (darv)
2009-12-21 20:24:29 AST (-0400)

The latex was orange and they were under a lone pine tree is a field of grass.

By: Erin Page Blanchard (CureCat)
2009-12-21 20:05:07 AST (-0400)

Darvin found these, it is safe to assume that he considered the details of host trees and latex colour…

I see only Pine needles (no Douglas Fir litter) in the photos, and in the first image you can see some scrapes on the gills, and the damage looks pumpkin orange, not red.

What color was the Latex?
By: Johannes Harnisch (Johann Harnisch)
2009-12-21 19:48:14 AST (-0400)

did it stain red? it was found under pine right? or was there other trees ?

Created: 2009-12-20 23:34:43 AST (-0400)
Last modified: 2009-12-20 23:34:43 AST (-0400)
Viewed: 239 times, last viewed: 2016-10-28 09:55:13 ADT (-0300)
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