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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: basionymous. Taxonomic rank: species. Currently accepted name Xanthoparmelia ferruma Elix & J. Johnst. Xanthoparmelia. Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Xanthoparmelia ferruma Elix & J. Johnst. Type: Xanthoparmelia ferruma Elix & J. Johnst.

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

Ecology: Biotroph; lichenized; saxicolous; growing under conditions which are dry (in subarid inland).

Thallus: Foliose, subdivided into main parts, lobed; lobes elongate (sublinear-elongate), imbricate (barely imbricate); separate thallus parts 1-2-(3) mm wide. Thallus Size and Differentiation: Up to 5 cm in diameter; apex rounded (apices of marginal lobes subrotund). Upper Surface: Lime green (pale yellow-green, blackening with age, lobe margins often black), matt; fissurate (older lobes with transverse cracks); immaculate; wrinkled (central lobes becoming rugose); not isidate; not sorediate. Lower Surface: Present (flat), brown (rarely partly brown-black); attached by holdfasts (tightly adnate); rhizinate (short, slender); rhizines moderately abundant, brown (concolorous with lower surface), not branched.

Medulla: White (mostly white, intermittently orange adjacent to lower cortex).

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, soon sessile, 1-2 mm in diam.. Margin: Smooth, distinct (thick, involute, becoming thin and undulating). Disk: Excavate (disc concave then +/- flat), brown (brown-black).

Secondary Metabolites: Present; throughout the thallus medulla, consalazinic acid, protocetraric acid, salazinic acid, and usnic acid (other secondary metabolites: skyrin in pigmented medulla).

Spot Tests: Cortex: KC – medulla: K + yellow changing to red (white medulla K+ yellow then dark red; pigmented medulla K+ violet), C –, PD + deep yellow (intense yellow).

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