Xanthoparmelia mexicana (Gyeln.) Hale
Phytologia 28: 488 (1974).
Basionym: Parmelia mexicana Gyeln., Reprium nov. Spec. Regni veg. 29: 281 (1931).
Synonyms: Index Fungorum
Type: Parmelia mexicana [San Jeronima, Mexico, Amable 676(BP, lectotype; designated type in Bouly de Lesdain herbarium destroyed).
Thallus: foliose, adnate to loosely adnate, 4-10 cm broad, yellowish green; lobes subirregular, 1,5-4 mm wide, apically rotund, rarely marginally laciniate, contiguous to imbricate; upper surface continuous to rarely in part white- maculate, shiny, densely isidiate, the isidia subglobose to cylindrical or irregularly inflated, 0,1-0,2 mm in diameter, 0,1-0,5 mm high, the tips syncorticate, brownish to blackening, becoming coralloid with age; medulla white; lower surface plane, pale brown, moderately rhizinate, the rhizines pale, simple, 0,2-0,5 mm long. Pycnidia rarely developed; conidia bifusiform, 0,5 x 6-7 µm. Apothecia rare, substipitate, 3-10 mm in diameter; spores 5-6 x 9-10 µm.
Photobiont: Trebouxia.
Chemistry:Salazinic acid, consalazinic acid (+-), usnic acid.
Ecology: On rock.
Molecular data: Genbank
Distribution: Argentina. Database
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