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Data Set Maintenance: Data set compiled (Flora of Australia Vol. 55 Lichens-Lecanorales 2, Parmeliaceae). Data set author(s): Nöske, N. M. (04-09-18). Data set not revised; to be published after submission.

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

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

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

Ecology: Biotroph; lichenized; terricolous (or debris); growing under conditions which are dry (in arid shrubland).

Thallus: Foliose, subdivided into main parts, isotomic-dichotomous (subdichotomously to subirregularly branched), lobed; lobes elongate (sublinear-elongate), imbricate; separate thallus parts 1-2 mm wide. Thallus Size and Differentiation: 3-5 cm in diameter. Upper Surface: Yellow (to pale yellow-green, darkening to olive-green), matt, smooth (at marginal lobes); immaculate; not isidate; not sorediate; lobulate. Lower Surface: Present (canaliculate), brown (to pale tan); rhizinate; rhizines moderately abundant, brown (concolorous to lower surface or darkening), not branched.

Secondary Metabolites: Present; throughout the thallus medulla, consalazinic acid, norstictic acid (norstictic and protocetraric acid in traces), protocetraric acid, salazinic acid, and usnic acid.

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

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