Observation 115067: Leptonia tjallingiorum sensu Largent
When: 2012-10-26
Herbarium specimen reported

Proposed Names

29% (1)
Recognized by sight: this gorgeous little wood-rotting Leptonia was best of show!
31% (2)
Eyes3
Recognized by sight: on wood, violaceous stipe, brown cap, on wood

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Sure Debbie
By: Christian (Christian Schwarz)
2014-06-10 19:30:33 SAST (+0200)

you have the address. Maybe I’ll get around to it

Hi Christian.
By: Debbie Viess (amanitarita)
2014-06-10 19:10:51 SAST (+0200)

While searching my herbarium yesterday, I came across this specimen. Want it? Sounds like you are running all sorts of out of area DNA, and this would be an interesting one to throw onto your Leptonia pile.

I still look forward to seeing that Leptonia DNA tree some day! Who better than you to make it so? ;)

Can’t rule out cyanea var occidentalis.
By: Steve Trudell (mycecol)
2012-11-03 21:19:43 SAST (+0200)

After reviewing Noordeloos’s description of L.t. and Largent’s description of L.c.o., the morphological differences are extremely minor. Biggest one is cap color – but need to observe it in very young material as both species are brown in age. And the MPA specimens were mature. Also note that Noordeloos described L.t. as occurring on oak and birch – no mention of conifers.

So I’m not convinced that the MPA material can be confidently assigned to either of these two spp. Given that, I would opt for tentatively calling it L.c.o. because:

1. It is a western No Amer sp – based on collections from WA and northern CA. (the sp itself was described by Peck from NY – var cyanea is a hardwood associate). L.t. is a European sp.

2. It occurred on conifer wood. L.t. is a hardwood sp.

3. Largent is the only basis I can find for calling No Amer material L.t. (inasmuch as Drew’s ID hinges on David’s blessing), and his photo of it in the Agaricales volume has a violaceous cap (which is supposed to be the L.c.o. character). He doesn’t address the conifer/hardwood issue plus his comments comparing the two spp are not consistent so it’s not easy to pin down the concepts. In any case, he was not convinced that the two spp were different.

4. If it turns out that L.c.o. and L.t. actually represent just one species, then L.c.o. would have priority (described in 1977 vs 1982 for L.t.)

Specimens
By: Christian (Christian Schwarz)
2012-11-02 03:37:37 SAST (+0200)

Hey Debbie, having specimens for these would be great. They are lovely and in very good shape.
My address is on my profile. Thanks! Great find.

distinctly brown (not violet or blue black) cap with an inrolled margin…
By: Debbie Viess (amanitarita)
2012-11-02 01:07:17 SAST (+0200)

separates it out nicely.

here are photos of both species:

http://www.svims.ca/council/Entolo_I.htm

and descriptions:

http://www.svims.ca/council/Entolo.htm#nLep

the material is in excellent condition and has already been dried. I planned on giving it to Christian, since he has spent an inordinate amount of time studying this group (his specialty, actually), and he would best be able to determine what we have here.

whether they are merely synonyms is another question entirely.

How did you rule out L. cyanea var. occidentalis?
By: Steve Trudell (mycecol)
2012-11-02 00:37:24 SAST (+0200)

It could well be L. tjall. – but L.c.o. and L. tjall. are very similar and Largent (in his Agaricales of CA volume) states that they might be one species (the spp in the lignicolous leptonia group have not been collected often enough for concepts to be defined well). Differences between the two species are small and involve cap color, young gill color, and odor, none of which seems to be unequivocal. In Largent’s photos of the two, the one for L.c.o. seems a better match for cap color.

Is the material available and in good enough condition that the differences could be checked?

looks good Christian.
By: Debbie Viess (amanitarita)
2012-11-01 18:37:47 SAST (+0200)

down to the photo match. Was the species by Largent ever published?

Yes, that wood rotting habit was a standout, as well as the color. It’s gotta be just another Entoloma now, though, right? Darn it, Leptonia really spoke to me. :(

Would you like the dessicata for your “Leptonia” collections?

looks good Christian.
By: Debbie Viess (amanitarita)
2012-11-01 18:36:32 SAST (+0200)

down to the photo match. Was the species by Largent ever published?

Yes, that wood rotting habit was a standout, as well as the color. It’s gotta be just another Entoloma now, though, right? Darn it, Leptonia really spoke to me. :(

Would you like the dessicata for your “Leptonia” collections?

looks good Christian.
By: Debbie Viess (amanitarita)
2012-11-01 18:36:06 SAST (+0200)

down to the photo match. Was the species by Largent ever published?

Yes, that wood rotting habit was a standout, as well as the color. It’s gotta be just another Entoloma now, though, right? Darn it, Leptonia really spoke to me. :(

Would you like the dessicata for your “Leptonia” collections?

It’s a European name
By: Christian (Christian Schwarz)
2012-11-01 06:37:34 SAST (+0200)

but there is a similar taxon round here.

To find a description, use Google Search:
http://www.mycobank.org/...
http://www.svims.ca/...

species description?
By: Debbie Viess (amanitarita)
2012-11-01 06:32:58 SAST (+0200)

I have it here with me.

Created: 2012-10-31 21:12:33 SAST (+0200)
Last modified: 2014-06-10 19:11:21 SAST (+0200)
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