Note, this was about 250 m downstream of another location where I found this species last year. There's some discussion about the ID. https://inaturalist.ca/observations/19604739. Lee Ck, Roscoe Inlet

Foliose thallus with yellowish-green upper, white lower, white marginal soredia, black marginal pycnidia, growing on trunk bark of Pinus strobus in wooded backyard of private property; pictured wet, 10× upper, 17× lower.