Michigan Bot. 12, 1: 19 (1973). Basionym: Verrucaria leucoplaca Wallr., Fl. crypt. Germ. (Norimbergae) 3: 299 (1831).
Basionym: Verrucaria leucoplaca Wallr., Fl. crypt. Germ. (Norimbergae) 3: 299 (1831).