Synonymy:
Usnea longissima Ach., Lich. Univ.: 626 (1810)
Parmelia longissima (Ach.) Spreng., Syst. veg., Edn 16 4(1): 277 (1827)
Parmelia coralloidea var. longissima (Ach.) Eschw., in Martius, Fl. bras. enum. pl. 1(1): 230 (1833)
Usnea barbata var. longissima (Ach.) Schaer., Enum. critic. lich. europ. (Bern): [3] (1850)

Position in classification:
Dolichousnea, Parmeliaceae, Lecanorales, Lecanoromycetidae, Lecanoromycetes, Ascomycota, Fungi

Note:
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