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Parmotrema perlatum
A leafy or foliose lichen with a grey-green thallus that is loosely attached to branches or rocks. A single specimen can grow to about 15 cm in size. The lobes that make up the thallus are up to 15 mm in wide. The edges of the lobes are wavy and raised up from the substrate and contain soralia. The underside is black towards the centre and the region towards the edge of a lobe is rich brown in colour. The edge itself is a characteristic black, giving rise to the popular name of ‘black-edged leaf lichen’.
Widespread in Ireland and particularly abundant in the south and west. It prefers acid bark or silica-rich rocks in well lit areas. Frequently abundant on hawthorn. This one was growing on rocks near the pebbly shore of the Kenmare Bay.
Spotted on Jul 4, 2012
Submitted on Jul 4, 2012
6 Comments
arlanda, I added the spotting again with the back views...
http://www.projectnoah.org/spottings/123...
and a couple of other ones that looked different. One had red on it and I couldn't decide if it was natural or something spilt on it. But it was hard to get to and there were several with red.
good girl!
thanks Arlanda, I'll go and look at the underside! I have some growing on an old apple tree in the orchid as well as on the rocks by the beach. I'll check both!
It could be Parmotrema perlatum. To confirm it you should have a look at the underside. With foliose lichens you always have to look at the underside. It should be black with dark rhizines (kind of cilia that join the lichen to the sustrate) and a bare, tan-coloured zone towards the margin. But most possible choice is P. perlatum
arlanda, is this Parmotrema perlatum
Lichen