Lichen on twig

Lichen on twig

Observation - Lichen on twig. Description: Greenish grey foliose lichen. Small. Twig in photo about 5mm. Diameter. Covered in fruiting bodies. Brown discs with thallus -coloured outer ring. On willow.

Greenish grey foliose lichen. Small. Twig in photo about 5mm. Diameter.
Covered in fruiting bodies. Brown discs with thallus -coloured outer ring.
On willow.