Peltigera canina (L.) Willd.
Resembles P. membranacea but with much flatter veins and dense, bushy rhizines on the underside. Distribution restricted to basic coastal grassland and dunes
Smith et al. editors (2009) The Lichens of Great Britain and Ireland
Dobson (2018) Lichens: an Illustrated Guide to the British and Irish Species
Ahlti et al. editors (2012) Noric Lichen Flora. Volume 3: Cyanolichens