Two cm colony on moss on soil layer over rock, beside the stream. The reflected colour of the sky is a bit deceptive; the thallus is translucent green-black. Thickened, often ascending margins. No isidia or apothecia. There is occasional white tomentum to affix it to the moss.
Discovered by Isabel G.
Limestone boulder.
On exposed roots of a fallen red oak.
WDV 553
On rock
I’m unsure