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Data Set Maintenance: Data set standard item. Data set author(s): Nash T.H. Data set reviewer(s): Nash T.H.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Parmelia. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Biogeography: Northern hemispheric; holarctic and boreal; montane and upper montane. Continent: Asia-Temperate, Europe, and Northern America. Checklist records: Austria, Estonia, Germany, Great Britain, Iberic Peninsula, Italy, Sonoran Desert, and United States and Canada (continental).

Thallus: Foliose, subdivided into main parts, and secondary or without secondary parts, sub irregular, continuous throughout, lobed; lobes elongate, horizontal; plane; branches applanate (moderately flattened); bifacial; not segmented; separate thallus parts 1-1.5-2 mm wide. Thallus Size and Differentiation: 2-4.5-7 cm in diameter; main branches basally not constricted; apex truncate. Upper Surface: Grey or pale grey, plane, matt or glossy (shiny), smooth; fissures strongly developed, without extrusions, longitudinally and transversally oriented oriented; not foveate; not convoluted; immaculate; without patches; epruinose; not pseudocyphellate; not wrinkled; eciliate; without hairs; isidiate; isidia central, peripheral, or laminal, submarginal, cylindrical, not ramified, darkened at the tip; without isidiomorphs; not papillate, not pustulate; not sorediate; not tuberculate; not lobulate. Lower Surface: Present, black, black in the centre, black along the margin; attached by holdfasts; not cyphellate; not wrinkled; rhizinate; rhizines moderately abundant, extending all across the lower surface, black, not branched; not tuberculate.

Secondary Metabolites: Present; throughout the cortex or throughout the thallus medulla, atranorin, consalazinic acid, or salazinic acid, metabolite(s) of unresolved identity: absent.

Spot Tests: Cortex: KC + deep yellow; medulla: K + yellow changing to red, C –, KC –, PD + red.

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