Xanthoria parietina (Common orange lichen)

Common orange lichen, yellow scale, maritime sunburst lichen, shore lichen, orange wall lichen

3/12/2025 · Bailey Island Bridge, Orr's Island, Maine · ≈ 5 × 3″ (12 × 8.5 cm) ID is uncertain

4/19/2014 · Owl’s Head Lighthouse, Owl’s Head, Maine · ≈ 6 × 4″ (16 × 11 cm)

5/2/2021 · Maquoit Bay, Brunswick, Maine · ≈ 4½ × 4″ (12 × 10 cm)

4/19/2014 · Owl’s Head Lighthouse, Owl’s Head, Maine · ≈ 7 × 4½″ (18 × 12 cm)

4/19/2014 · Owl’s Head Lighthouse, Owl’s Head, Maine · ≈ 6 × 4″ (14 × 10 cm)

3/12/2025 · Bailey Island Bridge, Orr's Island, Maine · ≈ 6 × 3½″ (14 × 9.6 cm) ID is uncertain

Kingdom	Fungi	Mushrooms, lichens, gel fungi, yeasts, and molds; also called eukaryotes
Division	Ascomycota	Sac fungi
Subdivision	Pezizomycotina	Sac fungi with filaments
Class	Lecanoromycetes	“Lichenized” fungi
Order	Lecanorales	Mostly lichen-forming fungi
Suborder	Teloschistineae	Includes Caloplaca, Fulgensia, Teloschistes, Xanthoria, others
Family	Teloschistaceae	Includes Caloplaca, Teleschistes, Xanthoria
Genus	Xanthoria	From Greek xanthos, “yellow”
Species	parietina	From Latin parietina, ”of walls,“ for its frequent occurrence on walls