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for everything, Jason :)
You’re taking excellent photos. Let me just stress the importance of trying to get a good photo of the underside — particularly important for most Peltigera, but also useful for many other groups of lichens. Just always a good practice when encountering a new type of lichen. :)
I’d say this one is clearly one of the ones with smooth upper surface: polydactylon or neckeri groups — the former with brown apothecia, the latter with black. The neckeri group also tends to have a faint whitish pruina near the tips, which maybe is visible on some of the photos, can’t tell for sure.
is my first time photographing one Peltigera, with attention to the underside, I remembered that I could try to identify the species, but I just saw 40 pages of photos here from MO and gave one node to the brain. I do not know if I have the courage to study so laborious things, at least at this point, but it seems interesting. I’ll see if I understand anything, at least. Thanks for answering and for the links and book reference.
in my observations of species belonging to this genus, I’m not the right person to answer your question, since I always had difficulties in classifying the specimens. Anyway I’ll give my opinion.
Characters important in this genus are: photobiont, dimensions of lobes, smoothness or not of the upper surface, presence of isidia or soredia, the color and form of the veins and of the rhizines and also the existence of tomentum on the underside. However, frequently these caracteres are present in such a way that is very difficult to decide. On the other hand, there are species where some of the features are more or less constant and others that admit a wide variation.
Below I give some links where you can find more detailed information about most of the species of Peltigera:
Irish lichens (by Jenny Seawright), lastdragon (by Alan Silverside), Pelt Lichens of North America (by Jason Hollinger)[includes a key].
If you have 10 euros, then you can order the following booklet:
Flora Liquenológica Ibérica. Peltigerales: Lobariaceae, Nephromataceae, Peltigeraceae,
Ana Rosa Burgaz e Isabel Martínez, 2003,
Sociedad Española de Liquenología, SEL. Murcia,
61 pp dibujos, ISSN: 1696-0513,
using the e-mail address given here.
This book contains all the species existent in Portugal and Spain, including their distribution in the Iberian Peninsula. Good luck.
someone please explain me how to classify Peltigeras?
Created: 2013-03-09 17:03:54 EST (-0500)
Last modified: 2013-03-09 17:03:59 EST (-0500)
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