ID thanks to Roger Rittmaster, Bartramia pomiformis. This moss is on the access path to the Witch Hole Trail, 44 24′ 14″ N and 68 14′ 55″ W (sorry I don’t know how to get the degree sign for the notations). Acadia Nat. Park.
ID thanks to Grace Bartlett, Bazzania trilobata. This liverwort is not in the park; it’s on Mt Desert Island, 44 24′ 54″N 68 15′ 08″W I did not touch or measure because the water droplets were so fragile, but my fingernail, visible in photo is 1 cm at midpoint.