Flora, Regensburg 71: 24 (1888).

Basionym: Sticta leylandii Taylor, London J. Bot. 6: 179 (1847).

Note:
There is a subsp. azoricum P. M. Jørg. & P. James
Protolog: Differt a subspecie typica thallo crassiore, hirsutissimo et contentu chemico (argopsicum et norargopsicum etiam acidum pannaricum et al.).

Protolog type data: Typus: Azores, Pico, south of Santa Luzia, northern slopes of Mt. Pico, Cerrado de Sonicas, on scattered Erica and Juniperus on hillside near the signal station, alt. 900-1000 m, 11 June 1978, P. W. James s.n. (BM-holotypus; BG, LISU, UPS-isotypi).

Type locality: Portugal, Azores, Pico, south of Santa Luzia, northern slopes of Mt. Pico, Cerrado de Sonicas, on scattered Erica and Juniperus on hillside near the signal station, 900-1000 m, 11 June 1978, P. W. James s.n. (BM - holotype; BG, LISU, UPS - isotypes).

Die subsp. werden in IF nicht akzeptiert. Erioderma leylandii subsp. velligerum (Tuck.) P.M. Jørg., Taxon 50(2): 534 (2001) ist E. l. fide IF