Leptogium burgessii

Leptogium burgessii is a species of foliose lichen in the family Collemataceae. The species was originally described by Carl Linnaeus in 1774 and transferred to Leptogium by Camille Montagne in 1840. It forms leafy greyish to brownish patches distinguished by a velvety lower surface covered with short cream-coloured hairs composed of spherical cells. In Europe, L. burgessii has an oceanic Atlantic distribution, occurring from the Canary Islands through north-western Iberia to south-western Norway, where it grows on tree bark and mossy rocks in humid forests. The lichen requires high air humidity and is typically found in well-preserved old deciduous woodland, often growing over mosses on broad-leaved trees such as ash. Although the species has been reported from other continents including Africa, Asia, and South America, molecular studies indicate that many extra-European records may represent closely related but distinct species....read more on Wikipedia.