Observation 22616: Russula clavipes Velen.

When: 2009-06-28

Collection location: Luzerne Co., Pennsylvania, USA [Click for map]

Who: Dave in NE PA

No specimen available

To me, this was perhaps the most interesting mushroom of the weekend. Cap color is not what one would associate with xerampalina types. But the following were observed: fishy odor, brown staining on gills, sulcate cap margin (which I believe rules out R. compacta), yellow spore print, Spiny or warty spores (I’m not really sure what the difference is; photo did not capture this). Found growing on a lawn beneath Norway Spruce.



Proposed Names

28% (1)
Used references: Phillips, although this color variation does not quite appear there.
60% (2)
Used references: irenea called it.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Dave W (Dave W)
2009-06-30 04:56:37 PDT (-0700)

another virtually identical specimen yesterday.. also with yellow spore print… grassy edge of an oak woods not in the same area as the one seen here. Also found two of the deep purple/red R. xerampelina types in the same area. In my experience all of these xerampelina types are uncommon around here. Years back I had examined many Russulas hoping to find a few of these, with almost no luck. And the few I did manage to find were in late summer or fall.

The habitat
By: Irene Andersson (irenea)
2009-06-29 13:43:01 PDT (-0700)

- grassy, and growing with Norway Spruce – and finding it in the easternmost part of USA, makes it rather likely to actually be Russula clavipes, not just looking like it.
I have seen the other “xerampelina” obses on MO, and very few of them resemble any possible clavipes, so i don’t think it’s a common form of xerampelina here at all.

By: Dave W (Dave W)
2009-06-29 12:47:12 PDT (-0700)

Irene. The image is found under obs 5038. Yes, the spores seen in photo 8500 under higher magnification show spines (thin sharp warts). Although difficult to see, looking through my scope I could make out this type of ornamentation.

I don’t know how common this type is in North America. If anyone is interested in studying it, I still have half the mushroom in my refrigerator.

In Scandinavia,
By: Irene Andersson (irenea)
2009-06-29 05:29:32 PDT (-0700)

R. clavipes (also called elaeodes), is the most common one of the shrimp russulas in grassy spruce forests.
You could take a look at image 8500, and compare with those spiny spores.

By: Dave W (Dave W)
2009-06-29 04:53:48 PDT (-0700)

little (so far, my guides are at home) on R. clavipes. But one internet site shows/describes it and it appears to be a good match. Site mentioned that this one is in the xerampelina group. Other xerampelina like characteristics which I forget to mention are the textured stalk and the rosy flushing of the upper quarter of the stalk surface.

I think
By: Irene Andersson (irenea)
2009-06-29 01:48:13 PDT (-0700)

this is the extremely variable Russula clavipes

Created: 2009-06-28 18:48:57 PDT (-0700)
Last modified: 2009-06-28 18:48:57 PDT (-0700)
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