Observation 74167: Tricholoma viridilutescens M.M. Moser

When: 2011-08-13

Collection location: Zavidovo, Tver Oblast, Russia [Click for map]

Who: Iv Merlu (Merlu)

No specimen available



Proposed Names

27% (1)
Recognized by sight: With what looks like a viscid cap, and overall features look closer to Tricholoma portentosum
54% (1)
Recognized by sight: greenish cap with black stripes (like in portentosum), growing with spruce

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
The current opinion
By: Irene Andersson (irenea)
2011-08-18 09:07:56 CDT (-0500)

in Europe, is
1. sejunctum with Quercus and Fagus on calcareous soil, a rare and threatened species
2. arvernense, on sandy soil with Pinus
They look pretty much the same. Check out other obses at MO and pictures on the web of arvernense too.

And then there is one with a darker green cap that grows with spruce, which I call viridilutescens.

T. sejunctum and arvernense are separated in Flora Agaricina Neerlandica, but they add to more confusion with other names. Making viridilutescens a synonym of sejunctum results in a taxon without a name…

But all these names are a mess, I don’t think the last word has been said yet.

Ecology: Mycorrhizal with hardwoods or conifers
By: Iv Merlu (Merlu)
2011-08-18 08:21:15 CDT (-0500)


Cap: 5-7.5 cm; broadly convex, flat, or with a central knob; sticky or dry; yellowish to yellowish olive; with dark, radiating, appressed fibers (especially over the center); the margin often somewhat inrolled when young.

Gills: Attached to the stem by a notch; close; white, developing yellow tinges near the cap margin in age.

Stem: 5-10 cm long; 1-2 cm thick; equal; smooth; dry; whitish or with yellow tinges.

Thank you, Irene, for the comment! Let us keep in mind these Tricholoma species!

Have you considered
By: Irene Andersson (irenea)
2011-08-18 07:39:19 CDT (-0500)

Tricholoma arvernense or viridilutescens?
Doesn’t look like the right habitat for sejunctum (with hardwoods).

Created: 2011-08-18 07:32:53 CDT (-0500)
Last modified: 2013-03-02 02:21:21 CST (-0600)
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