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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. (06-05-31). Data set not revised; to be published after submission.

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

Type Information: Basionym: Xanthoparmelia segregata Elix & J. Johnst. Type: Xanthoparmelia segregata Elix & J. Johnst.; type specimen label data: J. Johnston 1502; holo: CBG.

Biogeography: Southern hemispheric. Continent: Australasia. Checklist records: Australia (rare, endemic, in hinterland areas of N.S.W. and Vic.).

Thallus: Foliose (small-foliose, lobate in thallus centre), irregular, lobed; lobes linear (sublinear to subirregular), imbricate (moderately imbricate); separate thallus parts.3-.5-(1) mm wide. Thallus Size and Differentiation: 4-6 cm in diameter. Upper Surface: Lime green (lobe margins black), plane, glossy (shiny) (at lobe apices), smooth; immaculate; isidiate; isidia central, globular or cylindrical (becoming cylindrical or expanding laterally), not ramified or ramified (rarely branched); not sorediate. Lower Surface: Present, brown or pale brown (shiny, darker black-brown at lobe apices); attached by holdfasts (loosely adnate); rhizinate; rhizines sparse, brown (concolorous with lower surface) or pale brown, not branched.

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, soon sessile, up to 3 mm in diam.. Margin: Distinct (thalline exciple thick and involute, becoming thinner and crenate); isidiate. Disk: Excavate to plane (becoming +/- flat), pale brown or dark brown.

Secondary Metabolites: Present; consalazinic acid (and connorstictic acid (minor)), norstictic acid, salazinic acid, and usnic acid.

Spot Tests: Cortex: KC – medulla: K + yellow changing to red, C –, PD + deep yellow.

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