Ramalina lacera
Ramalina lacera
Ramalina farinacea
Usnea glabrescens (Thallus K+ y-r, soralia frequent and excavate with no isidia)
Porpidia cinereoatra
Verrucaria ochrostoma (Perithecia 100% immersed, no involucrellum).
Lecidella stigmatea (Pale exciple with bluish outer edge)
Acarospora fuscata
Porpidia speirea (Medulla I+ violet, apothecia immersed surrounded by thalline cracks).
Lecidella scabra (Upper part of hymenium blue-green, thallus C+ orange)
Lecanora polytropa
Lecanora strobilina (Thallus with no cortex, paraphyses without swollen tips, crystals in hypothecium and epithecium).
Cladonia gracilis and ramulosa
Verrucaria rheitrophila (with V.aquatilis). (submerged perithecia, 8-15µm spores)