Agyriaceae Trapelia obtegens Growth type crustose Chemical results: Soredia C+ red Found on dusty siliceous stones and rocks, occasional on plant debris. Vrey similar to T. glebulosa but with pale green to brownish convex areoles and larger greenish soredia. The sparse, scattered brown apothecia are not always present. Similar: Trapeliopsis flexuosa and Micarea coppinsii

Trapelia obtegens
On ironstone. Studland Heath, Dorset. May 2015