Xanthoparmelia darlingensis Elix & J. Johnst.
Mycotaxon 29: 363 (1987).
Synonyms: Index Fungorum
Type: xxx.
Thallus: foliose, very tightly adnate, 2-3cm broad, yellowish green but blackening with age at the center; lobes sublinear, 0.3-0.8 mm wide, sparingly dichotomously branched, irregularly constricted, black-rimmed, separate to contiguous; upper surface continuous emaculate, becoming transversely cracked with age, isidia and soredia lacking; medulla white; lower surface plane, black, densely rhizinate, the rhizines black, simple, robust, 0.1-0.3 mm long. Apothecia and pycnidia lacking.
Photobiont: Trebouxia.
Chemistry: Stictic acid (major), barbatic acid (major), 4-O-demethylbarbatic acid (trace), constictic acid, norstictic acid, cryptostictic acid (trace), usnic acid.
Ecology: On rock.
Molecular data: Genbank
Distribution: Database
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