Phytologia 28: 335 (1974).

Basionym: Parmelia commensurata Hale, Phytologia 22: 31 (1971).

Protolog: "Thallus ut in P. reticulara Tayl. sed differt norlaboridonum continente.

Holotype: On Acacia, 9 km on highway 140, elev. 1240 m, M. E. Hale, no. 19405, 13 March 1960 (US; isotypes in TNS, UPS) (Fig. 2)."

Type locality: Mexico, Veracruz, 9 km E of Jalapa on highway 140, 1240 m, 13.3.1960, M. E. Hale 19405 (US - holotype; TNS, UPS - isotypes).

Algae: Probably Trebouxia spec.

Chemistry: Thallus K+ yellow (atranorin), medulla K-