הזיהויים של bertharris

no cilia, marginal soredia, underside white near edges, brown then black further in; medulla K-,C+red KC+ red

Color similar to F. caperata (in the upper part of the last photo); white pseudocyphellae and laminal soredia; underside black , brown near margins; medulla K-, C+ red, KC+ red.

Using UV light

Lower surface with an orange pigment that reacts K+ purple