Mycotaxon 20(2): 682 (1984).

Basionym: Parmelia soredica Nyl., Bull. Soc. linn. Normandie, sér. 2 6: 316 (1872).

Thallus: foliose, 4 - 5 - 7 cm diameter, closely adnate; lobes narrow, subirregular, rounded, contiguous to crowded; upper surface yellow-green, pseudocyphellae minute or even absent, sometimes fairly maculate; margins wavy , sorediate; medulla white; lower surface pale brown or blackening, rhizines simple, numerous, distributed in the central part. Apothecia rare, saucer-shaped, imperforate; spores undivided, colourless (Divakar & Upreti 2005, Sohrabi & Jamshidikia 2007).

Chemistry: Cortex K -, medulla K-, C+ red, KC + red, P-. Usnic acid, lecanoric acid (Sohrabi & Jamshidikia 2007: 5 based on a single sample from Iran).

Ecology: mostly corticolous, rarely saxicolous.