Notes:
This set was found on a neighbor’s lawn beneath a juniper that is about 20-30 feet from a large oak.

There has been some recent rain but the ground is still dry.

Cap on the young ones was dark red/orange that bruised black. Cap on the older one was dark brown. The young ones had the typical “cool and wet in the palm” feeling I associate with subvelutipes but the older one a bit less so. No unusual smell or taste. Stipes all had a flat yellow ground color. One small one was yellow all the way down other than bruising. The other had some red by the bottom. The mature one had some dots and spots but I think they were environmental.

Everything stained blue, quickly and profoundly. The younger ones did so instantly and darker. NOTE: The ball at the base of the mature specimen has some red. The young ones do not. Photos from the same location last year showed mushrooms with a startling cherry red in the base of stipe context. I suspect this one was headed that way.

The pore color on these is notable. I know from other finds that barely-born specimens have yellow pores that quickly mature into the deep red seen here, often with the typical yellow at the edge. The older one moving back toward yellow is also typical, but I’m not sure if it is a true color change or an illusion from the pores opening up and exposing more of the yellow tubes.

The mature specimen was 7 cm tall and 8 cm across. The cap was 2 cm thick, with about 5 mm being tubes and 15 mm being context.

All chemical tests display ammonia on the left, KOH in the center, and FeSO4 on the right. Q-tips were used to remove extra liquid or as an applicator where appropriate. The tests are, needless to say, inconsistent with other finds. Arrrrgh.

Ammonia on Cap Skin: No reaction or maybe red
Ammonia on bruised Stipe Skin: Reddish brown
Ammonia on yellow Stipe Skin: Reddish brown
Ammonia on Cap Context: Orange/Yellow
Ammonia on Stipe Context: Orange/Yellow

KOH on Cap Skin: Red or darker
KOH on bruised Stipe Skin: Deep orange
KOH on yellow Stipe Skin: Red
KOH on Cap Context: Orange.
KOH on Stipe Context: Orange.

FeSO4 on Cap Skin: No reaction or darkened.
FeSO4 on bruised Stipe Skin: No reaction
FeSO4 on yellow Stipe Skin: Dark olive
FeSO4 on Cap Context: Olive green with a yellow halo.
FeSO4 on Stipe Context: Yellow

Images

The baby with a bit of red lower down on the stipe
Chemicals on bruised stipe. Ammonia, KOH, FeSO4
Chemicals on cap. Ammonia, KOH, FeSO4
Chemicals on context. Ammonia, KOH, FeSO4
Chemicals on yellow stipe skin. Ammonia, KOH, FeSO4
The mature specimen. Context 15 mm. Tubes 5 mm.
The mature specimen. Cap 8 cm across
The mature specimen. 7 cm tall
Closeup on the opened pores. Is there actually less red, or has it just spread out as the pores opened?
Staining on the mature specimen is a little slower and less profound. The line by the base is artificial – I did not cut all the way through.
Markings on the mature stipe
Breaking the tupes on the mature specimen
Young specimens blue faster and more profoundly. No red by the base.
Stem and pores.

Proposed Names

83% (1)
Recognized by sight
55% (1)
Recognized by sight: I know, I know. Discolor/luridiformis is European. Included here to distinguish from the hemlock associate.

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

= Observer’s choice
= Current consensus

Comments

Add Comment
A question:
By: Scott Pavelle (Scott Pavelle)
2017-08-20 11:10:21 PDT (-0700)

The pores on the older specimen have faded to yellowish orange. Did the color actually fade, or is it that optical illusion where it looks lighter because they have opened to reveal the yellow tubes on the inside?

Also, does this happen with all the red-mouths or is it a sign that might indicate speciation? That requires the sort of broad experience that I simply don’t have.

Nice!
By: Jon Shaffer (watchcat)
2017-08-20 00:18:37 PDT (-0700)
I have zero doubt that this is a different species than the hemlock subvelutipes
By: Scott Pavelle (Scott Pavelle)
2017-08-19 13:38:59 PDT (-0700)

I wish we could give it some name other than “discolor” as an alternative. Yes Igor, I know that “discolor” is a European species and therefore incorrect in the strict sense. But would it be fair to say “in the sense of North American authors until a new name can be settled?”