Xanthoparmelia donneri Elix & J. Johnst.
in Elix, Johnston & Armstrong, Bull. Br. Mus. nat. Hist., Bot. 15, 3: 231 (1986).
Synonyms: Index Fungorum
Type: xxx.
Thallus: very tightly adnate, 0.5-2 cm broad, yellowish green but darkening at the center; lobes sublinear, 0.2-0.5 mm wide, dichotomously branched, separate to continuous, emaculate, shiny, transversely cracked with age, isidia and soredia lacking; medulla white; lower surface plane, black, moderately rhizinate, the rhizines black, simple, 0.1-0.2 mm long. Pycnidia poorly developed; conidia bifusiform, 0.5x 5-6 µm. Apothecia adnate, 0.5-1mm in diameter; spores 5-6 x 7-11 µm.
Photobiont: Trebouxia.
Chemistry: Barbatic acid, norstictic acid, connorstictic acid, hyposalazinic acid (+/- trace), usnic acid.
Ecology: on rock.
Molecular data: Genbank
Distribution: Database
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