Observation 153504: Cortinarius multiformis (Fr.) Fr.

Growing among Sitka spruce.
Caps up to 5.4 cm across.
Spores ~ 8 X 5 microns.
KOH on cap brownish.
KOH on stem and flesh neg.
This appears to be the year for this species, with this being the third collection in three different locations.



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By: Debbie Viess (amanitarita)
2013-11-24 18:04:23 EST (-0500)

concurs with C. multiformis having vaguely warted ellipsoid spores and a brown KOH rxn.

the other similar cort to callimorphus w/limoniforme spores is polymorphus. it also shows reddish (vinaceous) KOH rxn.

multi, poly…I am getting confused by these similar names!

The KOH reaction threw me off initially
By: Ron Pastorino (Ronpast)
2013-11-24 17:15:38 EST (-0500)

but maybe Mushroom Hobby had a little hiccup.
Other references(e.g.Mushrooms of North America by Roger Phillips) notes that Cortinarius multiformis has ovoid spores and no reaction in KOH.

OK, now I am more confused…
By: Debbie Viess (amanitarita)
2013-11-24 15:40:36 EST (-0500)

I thought that multiformis also had citriniforme spores and a vinaceous (not brown) KOH rxn?

Multiformis and calliformis look awfully close…the cap KOH rxn for that sp. is described as carmine red.

Are we just getting into splitter land here?

Nobody promised us easy cort IDs…

So far, the closest look-alike…
By: Ron Pastorino (Ronpast)
2013-11-23 17:42:54 EST (-0500)

appears to be C. callimorphus.(see http://mushroomobserver.org/153453? )

so, for macro ID…
By: Debbie Viess (amanitarita)
2013-11-23 14:20:56 EST (-0500)

medium sized, unremarkable dry brown caps and a basal bulb. KOH rxn. confirms.

any other possible cort lookalikes that you know of?

Created: 2013-11-23 13:21:31 EST (-0500)
Last modified: 2013-11-23 13:21:35 EST (-0500)
Viewed: 69 times, last viewed: 2018-04-27 21:19:12 EDT (-0400)
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