Family: Pannariaceae
Pectenia ligulata (P.M. Jørg. & P. James) L. Lindblom, Wedin & S. Ekman
Type: Foliose
A rare species of western coastal rocks. Very similar to Pectenia atlantica. Rarely fertile
References:
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