Evernia mesomorpha rarely produces apotheica. On April 29th, 2013 I observed this thallus in Michigan's Upper Peninsula at Point Aux Chenes dune/swale complex just west of St. Ignace.
Substrate: The bark of a fallen black spruce tree.
Evernia prunastri grows in the western US and in Europe. Apothecia on e. prunastri is as uncommon as e. mesomopha. Here is a link to images of e. prunastri with apothecia:
See the second and third images.