Xanthoparmelia digitiformis (Elix & P.M. Armstr.) Filson
Brunonia 7, 1: 205 (1984).
Basionym: Parmelia digitiformis Elix & P.M. Armstr., Aust. J. Bot. 31(5): 470 (1983).
Synonym: Index Fungorum
Type: xxx.
Thallus: adnate to loosely adnate, 10-20 cm broad, dark yellowish green; lobes sublinear to subirregular, 1.5-3 mm wide, imbricate, becoming densely laciniate at the center, the secondary lobes digitately divided, 0.4-0.8 mm wide, subascending, black-rimmed; upper surface continuous, emaculate, shiny, isidia and soredia lacking; medulla white; lower surface plane, brown, rugulose toward the tips, sparsely to moderately rhizinate, the rhizines pale brown, simple to furcated, 0.3-0.8 mm long. Pycnidia common; conidia bifusiform, 0.5 x 5-6 µm. Apothecia common, substipitate, 2-6 mm in diameter; spores 5-6 x 9-10 µm.
Photobiont: Trebouxia.
Chemistry: Salazinic acid (major), consalazinic acid, norstictic acid (+/- trace), protocetraric acid (+/- trace), usnic acid.
Ecology: On rock.
Molecular data: Genbank
Distribution: Database
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