Fungi Outer Hebrides

Family: Hymeneliaceae

Tremolecia atrata (Ach.) Hertel

Type: Crustose

Rust-coloured, areolate, crustose thallus with black prothallus. Numerous immersed apothecia, concave, with raised margins. On exposed, hard, siliceous rocks, mainly in upland areas

Smith, C.W. et al. editors (2009) The Lichens of Great Britain and Irelandd
Dobson, F.S. (2018) Lichens: an Illustrated Guide to the British and Irish Species