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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. (06-05-28). Data set not revised; to be published after submission.

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

Type Information: Basionym: Xanthoparmelia rogersii Elix & J. Johnst. Type: Xanthoparmelia rogersii Elix & J. Johnst.; type specimen label data: R. W. Rogers 2871 p.p.; holo: MEL.

Biogeography: Southern hemispheric. Continent: Africa and Australasia. Checklist records: Australia (rare, only known from type in Australia, in the ranges of south-eastern Qld; also in Uganda).

Thallus: Foliose, irregular, lobed; lobes elongate or linear (sublinear to irregular), imbricate (lobes variable, moderately to sparingly imbricate); plane; separate thallus parts 2-3-(5) mm wide. Thallus Size and Differentiation: 6-8 cm in diameter; apex rounded. Upper Surface: Lime green (darkening with age, lobe margins commonly blackened), matt, smooth; immaculate; not isidate; not sorediate; lobulate (laciniae rarely developing, subdichotomously branched, 0.8-1.5 mm wide). Lower Surface: Present, black (jet black) in the centre, brown along the margin; attached by holdfasts (loosely adnate); rhizinate (robust); rhizines sparse, black (concolorous with lower surface) or brown, not branched.

Reproduction Strategy: With sexual (and possible asexual) stages (scattered). Ascocarps: Apothecioid, soon sessile, up to 12 mm in diam.. Margin: Persistent, distinct (involute, becoming thin). Disk: Excavate (then undulate-distorted), brown or dark brown.

Secondary Metabolites: Present; fumarprotocetraric acid, protocetraric acid (and succinprotocetraric acid), and usnic acid.

Spot Tests: Cortex: KC – medulla: K + yellow changing to red (first yellow then dingy brown), C –, PD + orange (orange-red).

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