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Data Set Maintenance: Data set compiled (Flora of Australia Vol. 55 Lichens-Lecanorales, Parmeliaceae). Data set author(s): Nöske, N. M. @EXCL@ Bungartz F. (06-05-19). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Xanthoparmelia nigraoleosa Elix & J. Johnst. Xanthoparmelia. Synonyms: (Xanthoparmelia subnigra auct. non Hale); Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Xanthoparmelia nigraoleosa Elix & J. Johnst. Type: Xanthoparmelia nigraoleosa Elix & J. Johnst.; type specimen label data: J. A. Elix 17748 & L. H. Elix; holo: CBG.

Biogeography: Southern hemispheric. Continent: Australasia. Checklist records: Australia (rare, endemic, in the Flinders Ra. and on Kangaroo Is., S.A.).

Thallus: Foliose (small foliose to subcrustose), irregular, lobed; lobes elongate or linear (irregular to sublinear), imbricate (barely imbricate, contiguous); plane; separate thallus parts.8-1.5 mm wide. Thallus Size and Differentiation: 3-6 cm in diameter. Upper Surface: Lime green (darkening and becoming greyish black, lobe margins black near apices), matt or glossy (shiny) (near lobe apices); fissurate (becoming cracked and areolate in older central portion of thallus, areolae ca. 1 mm wide); immaculate; not isidate; not sorediate. Lower Surface: Present, black, brown along the margin; attached by holdfasts (tightly adnate); rhizinate (slender); rhizines moderately abundant, black, not branched.

Reproduction Strategy: With sexual (and possible asexual) stages (common). Ascocarps: Apothecioid, soon sessile (sessile to subpedicellate), 1-2.5 mm in diam.. Margin: Smooth, indistinct (and continuous). Disk: Excavate, dark brown.

Secondary Metabolites: Present; atranorin and usnic acid (other secondary metabolites: constipatic acid (major), protoconstipatic acid (major) and +/- dehydroconstipatic acid (minor)).

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