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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@ Clerc, P. (04-11-02). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Xanthoparmelia everardensis (Elix & P. M. Armstr.) Elix & J. Johnst. Xanthoparmelia. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Parmelia everardensis Elix & P. M. Armstr. Type: Xanthoparmelia everardensis (Elix & P. M. Armstr.) Elix & J. Johnst.

Biogeography: Southern hemispheric (endemic, very rare). Continent: Australasia. Checklist records: Australia.

Ecology: Biotroph; lichenized; saxicolous; growing sun-exposed (on rock faces with a southerly aspect), under conditions which are dry.

Thallus: Foliose (foliose to subcrustose), subdivided into main (contiguous) parts, irregular, lobed (foliose to subcrustose); separate thallus parts 1-3 mm wide. Thallus Size and Differentiation: Up to 5 cm in diameter; apex rounded (apices subrotund). Upper Surface: Lime green (darkening with age), matt or glossy (shiny) (towards lobe apices); fissurate (older lobes irregularly fractured, and areolae commonly formed); immaculate; not isidate; not sorediate. Lower Surface: Present, black (dark blackish brown to jet black); attached by holdfasts (adnate to tightly adnate); rhizinate (short); rhizines sparse or moderately abundant, black, not branched.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, soon sessile, 1-2 mm in diam.. Margin: Smooth, distinct (entire). Disk: Excavate, brown (dark brown).

Secondary Metabolites: Present; throughout the thallus medulla, 4-O-demethylbarbatic acid, atranorin, barbatic acid, diffractaic acid, and usnic acid.

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