Flora, Regensburg 55: 35 (1872).
Chemistry: Thallus K+ yellow, Medulla C+ red, J+ blue (Mayrhofer & Poelt 1979: 53).
Note: "The authority citation "Arnold" [Mayrhofer xxx] instead of "Metzler ex Arnold" [xxx] is preferred. The species description has been written by Arnold. The type specimen has been collected by Metzler" (Pers. com. H. Mayrhofer 2.9.2010).