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|  » Stats |
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| | Welcome to our newest member, Ye Olde Justin | |  | 
06-06-2009, 02:16 PM
|  | Commander of the Wild Empire | | Join Date: Jun 2007 Location: SW Ireland
Posts: 1,668
| | | Lecanora conizaeoides?
This one was growing on a tree trunk near an aluminium-smelting plant.... Lecanora conizaeoides?
(K+ yellowish going greenish but I'm not sure whether my reagents are going off with age  ) 
The one below was on the neighbouring tree, again K+ yellowish going greenish but I don't think its the same species? 
Once again help is very much appreciated! |
18-06-2009, 01:32 AM
| | Officer of the Wild Empire | | Join Date: May 2007 Location: Renfrewshire, W. Scotland
Posts: 712
| | | Re: Lecanora conizaeoides?
Sorry Jenny, I would say not.
Lecanora conizaeoides has the thallus surface rather solidly powdered with soredia and the apothecial margins are also sorediate.
Your photograph shows the thallus (at least near the margins) to be smooth and the apothecial margins to be crenate but not sorediate.
My first thought was L. confusa, which I imagine is common in S.W. Ireland even if poorly recorded.
But it is K-negative.
Was your yellowish/greenish K reaction a real colour change or just a kind of enhanced wetting action?
If not L. confusa then I don't have any other suggestion, and in any case I like to check any Lecanora properly. The new Lichen book has 81 Lecanora species to choose from.
(And I might have just found number 82!).
Alan |
19-06-2009, 08:09 AM
| | Commander of the Wild Empire | | Join Date: Jun 2007 Location: SW Ireland
Posts: 1,668
| | | Re: Lecanora conizaeoides?
Quote: |
Was your yellowish/greenish K reaction a real colour change or just a kind of enhanced wetting action?
| I'm finding this difficult to tell as I've recorded quite a few greenish or yellow-green results. Does a dilute caustic soda solution (K) go off with time?
Bad photo but the only visual record I've got of the K reaction .... 
Good luck with the possible-82!
Last edited by JennyS; 19-06-2009 at 08:19 AM.
Reason: Added photo
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