Observation 141251: Russula Pers.

When: 2013-07-28

Collection location: Humboldt Co., California, USA [Click for map]

Who: Jeff Hitchcock (JHitch)

No specimen available

Proposed Names

28% (1)
Recognized by sight

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Eye3 = Observer’s choice
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the point of colonizing the Russula…
By: Debbie Viess (amanitarita)
2013-07-29 15:35:08 EDT (-0400)

is for the Hypomyces to use the host as a sort of scaffolding for its spore development. A rotten mushroom is not a very sound scaffolding!

On the other hand, Hypomyces sp. that parasitize amanitas and boletes and helvellas DO soften the tissue. Or maybe the hosts just rot more quickly underneath their Hypomyces covering?

It is more likely that what you have here is another type of mold on some Russula sp., perhaps a penicillium, but there are several possible blue molds that grow on mushrooms.

Hypomyces on young mushrooms
By: Christian (Christian Schwarz)
2013-07-29 15:19:21 EDT (-0400)

I have seen Hypomyces lactifluorum on tiny Russula primordium that were still well underground. So I agree with Darv – it gets on them when they are very young, and I don’t think I’ve ever seen it on a mushroom that was already old and rotting. Also, it usually covers the gills and stunts them into a thin layer unlike the ones visible in this photo.

By: Darvin DeShazer (darv)
2013-07-29 14:58:49 EDT (-0400)

I’ve never seen it on an old mushroom. I think it starts when the mushroom is VERY young and by the time it matures, the Hypomyces is ready to make pycnidia.

Def a rotten Russula…
By: Jeff Hitchcock (JHitch)
2013-07-29 14:21:27 EDT (-0400)

does the Hypomyces ever colonize an older Russula? or will it always be firm if it had been colonized by the Hypomyces?

By: Darvin DeShazer (darv)
2013-07-29 14:10:34 EDT (-0400)

These look like rotting Russulas. Hypomyces is not a rot as the Russula stays firm.

Created: 2013-07-29 00:49:29 EDT (-0400)
Last modified: 2013-07-29 14:26:28 EDT (-0400)
Viewed: 50 times, last viewed: 2017-06-16 09:12:45 EDT (-0400)
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