Bacidia scopulicola (Nyl.) A. L. Sm. forma

        Intermediate taxon between Bacidia scopulicola of which the thallus is covered with isidiform or sorediform protuberances and Bacidia sipmanii of which the thallus is thin, smooth-cracked and devoid of these protuberances. This taxon has a thallus with intermediate and even chimeric characteristics.*