Fungi Outer Hebrides

Family: Rhizocarpaceae

Rhizocarpon geographicum (L.) DC.

Map Lichen

Type: Crustose

Conspicuous bright yellow-green crustose lichen with flat black apothecia. Rather common on granitic rock

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