Peltigera identification request

[chrisjohnson]

The following were photographed at Loch Druidibeg in South Uist, growing in a former plantation area.
The first speciment was found growing amongst heather near a cleared area (site of a fire) and was in a relatively dry spot. I think it is probably Peltigera membranacea.
The second specimen was growing in a wet area among mosses. Unlike the first the upper surface was smooth (not felted) and the rhizines were brown and not white/grey. Struggling to name this one, so id guidance would be helpful.
Thank you
CJ

[JennyS]

Hi again - yes to the first, and have you considered Peltigera hymenina for the second?

[chrisjohnson]

Hi Jenny
Thank you again for the id help.
I had considered P. hymenina for the second one, but it has not been recorded on South Uist (but that doesn't mean its not here) although it has been recorded on Lewis, Harris and even St Kilda!
I think this maybe another case where a specimen is required.

CJ

[AlanS]

I would have liked to have seen clearer detail, but I pretty much agree with Peltigera membranacea.

The second one is much more tricky. If it is truly smooth on the upper surface, then P. hymenina is much the most likely possibility, but there are several species in which the layer of tomentum on the upper surface is so thin that it can be completely missed in the field.

It looks a little atypical for P. hymenina, though that's probably what it will turn out to be. It would be astonishing if P. hymenina was not widespread and common on the Uists.

Alan

[chrisjohnson]

I have had another look at these two Peltigera in the field and collected a voucher specimen of the second.
Peltigera membranacea - I think this identification is ok - the underside is pale with white veins

.

P. hymenina - I think this is probably correct - the upper surface is smooth and shiny, whilst the underside is pale with olive green/yellow veins. I also managed to find a sample with apothecia - which might help.
Unfortunately I did not photograph the underside in the field - perhaps the next time I visit the site I can do so.

If there is anything else I should check?
Your views would be appreciated
many thanks

Christine