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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. (06-05-09). Data set not revised; to be published after submission.

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

Type Information: Basionym: Parmelia incerta Kurok. & Filson. Type: Parmelia incerta Kurok. & Filson; type specimen label data: J. D. Curtis 7; holo: MEL.

Biogeography: Southern hemispheric. Continent: Australasia, Pacific, and Asia-Tropical (also in tropical areas of Papua New Guinea). Checklist records: Australia (relatively common in W.A., S.A., N.T., Qld, N.S.W., Vic. and Tas. (Bass Strait)) and New Zealand.

Ecology: Lichenized; saxicolous; growing sun-exposed, under conditions which are dry (subarid and arid areas).

Thallus: Irregular, lobed; lobes imbricate; 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 (pale yellow-green, darkening with age), convex, matt; fissurate (older lobes eventually irregularly cracked and areolate); immaculate; wrinkled (older lobes becoming rugulose); not isidate; not sorediate; lobulate (occasionally developing narrov 0.5-1 mm sublinear-elongate laciniae). Lower Surface: Present, black (or very rarely partly dark brown, paler near margins); attached by holdfasts (adnate to tightly adnate); wrinkled; rhizinate (robust, short); rhizines sparse, black, not branched.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, soon sessile, up to 8 mm in diam.. Margin: Crenulate (crenulate to deeply incised), indistinct.

Secondary Metabolites: Present; salazinic acid and usnic acid (other secondary metabolites: +/- constipatic acid and +/- 4-O-methylhypoprotocetraric acid).

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

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