Observation 34874: Cortinarius (Pers.) Gray

When: 2007-06-10

Collection location: Akademgorodok, Novosibirsk, Russia [Click for map]

Who: Tatiana Bulyonkova (ressaure)

Specimen available

A medium sized Cortinarius growing in small groups in mid-June in our relic dune pine forest on a sunny, well-drained slope with scarce herbaceous vegetation and scattered Vaccinium shrubs;
with smooth, visually minutely fibrous convex cap 3-5 cm dia., cyllindrical stipe appr. 9-12 mm thick and 50-80 mm long, white mycelial mat at stipe base;

flesh is solid, “juicy” and bright brownish-yellow – the species seems to contain antraquinone-like pigments accounting for its bright yellow hues. gills notched, rather broad and well-spaced, yellowish-cinnamon at all ages.

My best guess is C. limonius but I’m not sure if the habitat and such early fruiting fit(it’s roughly the end of Calocybe gambosa season here to give you the idea).

Maybe there are some specific microscopic things that could help to narrow down the ID using a dried specimen?


an attempt to draw spores

Proposed Names

83% (1)
Recognized by sight
72% (2)
Recognized by sight: or at least something in sect. Colymbadini(Melot)/Zinziberati(Moser).
It would be interesting to know if it has fluorescens in UV-light and what colour it has. Some sources say green, others yellow.
I’m open for better suggestions..

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

= Observer’s choice
= Current consensus


Add Comment
About Cortinarius subsp. Telamonia
By: Irene Andersson (irenea)
2010-03-18 13:48:09 CDT (-0400)

contains lots of interesting information and describes useful characters to look for in this difficult group.

By: Dimitar Bojantchev (dimitar)
2010-03-18 11:56:00 CDT (-0400)

The spores are just a bit too angular for C. colymbadinus, but based on appearance and time of fruiting I think it is something like in there, around C. colymbadinus or it s.s. I post lots of photographs of spores, but I also draw them on my reference sheets, as I find it easier to conceptualize them that way. Next thing for Tatiana is to start getting some sizes together. We in California do not have a closely resembling species amongst the number of Spring fruiting Corts. This one goes in Section Leprocybe, as pointed out, but the spores of most Leprocybe are sub-globose. So this one kinda stands apart and CFP puts it in its own Section, I think, Colymbadini.

Nice drawing
By: Irene Andersson (irenea)
2010-03-17 16:41:52 CDT (-0400)

Sometimes it’s better to try drawing what you see instead of taking a fuzzy photo :-) I like that picture, and it fits quite well with the narrowly ellipsoid to amygdaloid and rather strongly verrucose and small spores in colymbadinus (if that is the proper name to use). One problem though, it’s a species that is known to grow in rich spruce forests..

Followed the advice,
By: Tatiana Bulyonkova (ressaure)
2010-03-17 15:08:13 CDT (-0400)

and here’s what I got:
the staining reaction to an alkaline substance (stove cleaner, only thing at hand:)) is profound – cap surface stains bright maroon-purple instantly.
Spores are lemon-shaped or perhaps a bit more elongated (6.5) 7.5 – 8.5 (10) μm long and 5-6 μm wide, with what looks like minute spines or warts and a pore at one end, especially visible in the larger spores (to say that I’m a lousy microscope user is an understatement).

I tried to mouse-draw in photoshop what I saw – attached another image

Hmm, I wonder
By: Irene Andersson (irenea)
2010-03-17 13:26:01 CDT (-0400)

if this could be the same as (or close to) my Cortinarius “zinziberatus” or “colymbadinus” here at MO. It’s unclear what the names should be and how many different species they are (there’s an “isabellinus” too).

Your habitat is not at all the same, but mine are also very early on the season, with yellowish veil, green fluorescens in UV-light, and brown gills with a fringed, greenish yellow edge. The cap is hygrophanous and fades to yellowish.

I beleive it’s possible to check KOH-reaction even on dry material (red) if it’s in the group I think it is.
Also size, shape and ornamentation of the spores are important characters.

Created: 2010-03-17 11:47:52 CDT (-0400)
Last modified: 2010-03-17 11:47:52 CDT (-0400)
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