Observation 30854: Cortinarius subgenus Telamonia (Fr.) Trog

When: 2009-12-22

Collection location: Tomales Bay State Park, Marin Co., California, USA [Click for map]

Who: Ron Pastorino (Ronpast)

Specimen available

These seem to be another group that look like Cortinarius trying to look like Phaeocollybia or vice versa.
They were growing under a Madrone with Live Oak also nearby.
They had deep rooting stems with caps up to 11.0 cm across. The caps were dry and eventually the color faded to a whitish buff.
The spores were rusty and approx. 7.8-8.9 X 5.3-6.1 microns.
There were no obvious cortina hairs evident on the stems but the specimen on the far right did seem to have a few dark hairs around the middle portion. If the first photo is blown up to maximum, it is somewhat noticeable.
I could not find any cystidia on the gill edges but that would need to be confirmed.
Did not detect any strong odor.
KOH on the cap turned brown. On the cap flesh, only a slight darkening. No distinct color changes on the stipe or stipe flesh.



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With rooting stem
By: Irene Andersson (irenea)
2009-12-24 11:02:57 CET (+0100)

it could also be worth looking at the duracinus group. It’s not well investigated in Europe either, and often treated as duracinus s.l., given a rather wide range of spore size, habitat, the shape and brown colours on the cap. What they have in common is strongly hygrophanous caps, spores moderately to strongly dextrinoid, smell indistinct or slightly raphanoid, and the pale, rooting stem, rarely anything blue in them. With blue colours in the stem, sect. Bicolores is another to look into.
I don’t know if this is relevant for your investigations of californian corts – it’s merely a suggestion what to compare with when/if it comes to analyzing and comparing DNA..

By: Dimitar Bojantchev (dimitar)
2009-12-24 09:48:44 CET (+0100)

It is nice habit to apply KOH on all collections, but while is it critical with most Phlegmacia, generally in the Telamonia the result is rather “banal” — just plain darker brownish in most cases.


Familiar Telamonia
By: Dimitar Bojantchev (dimitar)
2009-12-24 09:45:34 CET (+0100)

There is a cluster of Telamonia in California that appear close to the C. biformis Fr. concept, at least from how I see it. I have collected similar things too and used that name, but I should mark it as a rather colloquial usage as I doubt they are truly the same. The spore sizes between Calfironia collections are quite similar. The silky caps and long stipes, frequently narrowing towards the base are quite distinctive in this group too. Also, these tend to appear somewhat later in the season.


Thank you for posting an observation, which is complete and can be worked with. We have come a long way and now it starts to get interesting to compare notes in California.


Created: 2009-12-24 05:10:26 CET (+0100)
Last modified: 2009-12-24 05:10:26 CET (+0100)
Viewed: 70 times, last viewed: 2017-06-06 14:37:17 CEST (+0200)
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