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but stupidly I didn’t collect any apothecia … I could start to observe the spores, though maybe all Parmeliaceae have similar ones.
I have the same impression: I see no alternative to your F. baltimorensis.
The isidia like structures are well developed and in the new specimen they almost seem true isidia, several branched in some cases; The margins of the apothecia have some pustules around, maybe not as marked as in your observations, but I didn´t observe them under the scope (which actually is not possible, since my microscope has no light from above).
But I have no idea who.
Flavoparmelia rutidota is fertile (neither sorediate nor isidiate). It’s also found in northern Mexico and extreme southwestern USA.
It would be very interesting if yours really were F. baltimorensis. That species has solid, irregular, isidioid outgrowths. I’m pretty sure I’ve posted some close-ups of the “isidia”… try observation 90250 and observation 95137. It is very common in eastern North America, exclusively on rock. (Also northern Mexico, South America, New Zealand, according to the CNALH map.
The former database collapsed and it is down. Now we only have available the so-called “Checklist of the Lichens and lichenicolous Fungi of the Iberian Peninsula and Balearic Islands”, available at
but one doesn’t know what is for Portugal or Spain.
In the previous link three species of Flavoparmelia are listed:
Flavoparmelia caperata (L.) Hale
Flavoparmelia rutidota (Hook.f. et Taylor) Hale
Flavoparmelia soredians (Nyl.) Hale
The 1st and the 3rd exist here and are not isidiate, the 2nd I don’t know (it seems to have an Australian distribution, as far as i could see in the internet).
Created: 2015-02-17 17:46:54 CST (-0500)
Last modified: 2015-03-23 20:24:34 CDT (-0400)
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