Basionym Name:Physcia tremulicola subsp. leptothallina Vain., Acta Soc. Fauna Flora fenn. 46: 167 (1921)
Homotypic synonyms:Physcia leptothallina (Vain.) Zahlbr., in Räsänen, Cat. Lich. Univers. 7: 640 (1931)