Thallus: foliose, adnate to loosely adnate on rock, 4-5cm broad, yellowish green; lobes subirregular to sublinear, 1,5-4 mm wide, contiguous to imbricate; upper surface continuous, emaculate, shiny, moderately to densely isidiate, the isidia variable, warty ans subglobose to cylindrical or irregularly inflated, 0,08-0,12 mm in diameter, 0,1-0,4 mm high, the tips epicorticate, erumpent and becoming postulate- sorediate with age, mostly unbranched; medulla white; lower surface plane, brown to dark brown, sparsely to moderately rhizinate, the rhizines brown, simple, 0,2-0,5 mm long. Pycnidia rare; conidia bifusiform, 0,5 x 6-7 µm. Apothecia rare, substipitate, 2-8 mm in diameter; spores 5-6 x 10-12 µm.

Chemistry: Be aware of unstandardized terminology: Norlobaridone (major), loxodin, scabrosin 4,4Ždiacetate (+-), scabrosin 4-acetate-4Ž-butyrate (+-), scabrosin 4,4Ž dibutyrate (+-), scabrosin 4-acetate-4-hexanoate, isonorlobaridone (+- trace), norlobariol (+- trace), norlobariol methyl ester (+- trace), conloxodin (+- trace), conorlobaridone (+- trace), usnic acid. (Hale 1990: xx). 4-acetyl-4'-hexanoylscabrosin (Begg et al. 1978), (Huneck & Yoshimura 1996: 126). 4-acetyl-4'-butyrylscabrosin (Begg et al. 1978, Huneck & Yoshimura 1996: 126), 4,4'-diacetylscabrosin (Begg et al. 1978, Huneck & Yoshimura 1996: 127), 4,4'dibutyrylscabrosin (Begg et al. 1978: , Huneck & Yoshimura 1996: 128).

Ecology: On rock. Especially common in New Zealand where it even grows on pavement and sidewalks in cities.

Molecular data: Genbank

Distribution: Argentina, New Zealand.

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