Observation 116026: Cladonia polydactyla (Flörke) Sprengel
When: 2012-11-01
Collection location: Sintra, Portugal [Click for map]
Who: zaca
No herbarium specimen
0 Sequences

This together with observation 116027 and observation 116028 all took place at remains of the same tree. Initially I thought that they were all of different species, but after some search I came to the conclusion that they may represent different stages of the development of the same species: Cladonia polydactyla. Is it possible?

There are more than one species in the photos attached. This observation refers to the one with bluish primary thallus.

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Re: Two colors
By: zaca
2012-11-08 16:22:12 CST (-0500)

I mentioned in the notes that this observation is about the lichen with the bluish (or is it gray?) thallus.
Thanks, for the comments, which confirm that two out of three are of the same species. I thought that the third one could also be C. polydactyla, but you described so well its characteristics that surely I was wrong.

Two colors
By: Jason Hollinger (jason)
2012-11-08 02:38:31 CST (-0500)

In this observation, there’s one green thing and one gray thing (clearly with atranorin, I’d say, because it has that distinctive bluish tone to it).

I’d say the gray one in both this observation and observation 116028 are definitely C. polydactyla. They match the description in the British Flora perfectly with the irregularly branched podetia with small cups, soredia mixed with microsquamules, incised basal squamules, and of course chemistry. Additionally, the key in the British Flora gives few other choices for red apothecia and lacking usnic acid. (C. digitata has very different basal squamules, C. incrassata has tiny ugly podetia, C. luteoalba would be distinctive, C. norvegica is supposed to be like C. macilenta. That’s it.)

But I’m wondering about observation 116027. It has a very different texture of soredia – thick and uniform, no microsquamules – and stout podetia. Wow, there are a lot of possibilities. It just doesn’t feel the same. I sure wish I could find at least on red apothecium or pycnidium, that would really help narrow it down…

Same with the short broad-cupped green thing in this observation. Red apothecia or pycnidia would really help, otherwise chemistry could narrow it a bit.

Good luck!

Created: 2012-11-07 16:54:09 CST (-0500)
Last modified: 2012-11-07 17:00:54 CST (-0500)
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