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Physconia perisidiosa
Foliose lichen 3-4 cm wide, with a green thallus when wet, drying grey or grey-brown with tinges of mauve. It has small lobes , expanded towards the tips, with marginal and terminal lip-like soralia and isidiate towards the centre of the thallus. The upper surface is pruinose and the undersides ecorticate at the tips, with black and bottle-brush-like rhizines, and white medulla. Apothecia are rare but when present have pruinose disks and have lobules around the disk margins.
Widespread but local on nutrient-rich bark, rarely on walls. This one was found on the bark of a Holm oak at 700 meters over the sea level.
The oak on whose bark was this lichen was completely covered by at least then different types of lichens., some of them I have not yet identified. Camera Model: NIKON D300 Exposure Time: 1/10 sec. f/9 ISO 100 Focal Length: 90.0 mm
Spotted on Feb 6, 2012
Submitted on Feb 17, 2012
3 Comments
Thanks Lars
nice one, arlanda
Added to Biodiversidad en España/Spain mission