New Species - Parmotrema perlatum

Another Lichen species confirmed after I checked the underside of the lobes to see the tan colour at the edges and also applied some bleach to the medulla check for colour change of which there was none. Prior to those tests it could have been from the Hypotrachyna genus but that would be black underneath to the edges of the lobes and would turn fleetingly red with bleach. Phew - this Lichen stuff is getting difficult.