Lichen (Ramalina farinacea)
Ramalina farinacea is one of the most tolerant on lichen species to air polution and, as a result, grows just about anywhere and is one of our more common lichens. In more poluted areas its growth can be stunted but here in Dorset we get lovely 'flowering' specimens, especially near the sea.
This is mainly a wwod-based lichen growing on the bark of trees and shrubs and around Poole Harbour you can see Blackthorn absolutely covered in it; an amazing site. The best place I know is at Swineham Point on tthe Wareham channel.
It does grow on rocks too but much is much less common on the rocky sea shore where it gives way to a couple of its close relatives.
Find out more about the nature of Dorset at my website www.natureofdorset.co.uk