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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: basionymous or accepted. Taxonomic rank: species. Parmotrema. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Biogeography: Neotropical; montane. Checklist records: Mexico and Sonoran Desert.

Thallus: Foliose, subdivided into main parts, and secondary or without secondary parts, isotomic-dichotomous, continuous throughout, lobed; lobes elongate, horizontal; convex; branches bifacial; not segmented; separate thallus parts 2-4.5-7-(0) mm wide. Thallus Size and Differentiation: 2-4.5-7 cm in diameter; main branches basally not constricted; apex rounded or truncate. Upper Surface: Grey, convex, matt, smooth; not fissurate; not foveate; not convoluted; with patches; epruinose; not pseudocyphellate; not wrinkled; ciliate; cilia slender, marginal; not isidate; without isidiomorphs; not papillate, not pustulate; sorediate; soralia white, laminal, subapical or terminal, capitate, confluent, but not fusing, soredia coarse or farinose; not tuberculate; not lobulate. Lower Surface: Present, black, black in the centre, brown (at tips) along the margin; attached by holdfasts; not cyphellate; not wrinkled, wrinkles central, isolated; rhizinate; rhizines sparse, with a narrow non-rhizinate margin, black, not branched; not tuberculate.

Secondary Metabolites: Present; only in the upper part of the cortex, throughout the cortex, or throughout the thallus medulla, atranorin, consalazinic acid, gyrophoric acid, protocetraric acid, and salazinic acid, metabolite(s) of unresolved identity: absent.

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

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