Rhizoplaca haydenii (Tuck.) W.A. Weber

in McCune & Rosentreter, Monogr. N. Am. Lichenol. 1: 91 (2007).

Basionym: Lecanora haydenii Tuck., Proc. Amer. Acad. Arts & Sci. 6: 227 (1866) [1864].