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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. (06-05-16). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Xanthoparmelia molliuscula (Ach.) Hale. Xanthoparmelia. Synonyms: Parmelia molliuscula Ach.
Parmelia thamnidiella Stirt.
Parmelia subpumila Elix
(Parmelia congruens auct. non Ach. = Pseudoparmelia congruens (Ach.) Hale); Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Parmelia molliuscula Ach. Type: Parmelia molliuscula Ach.; type specimen label data: Thunberg; holo: H-Ach; iso: UPS-Ach.

Biogeography: Southern hemispheric. Continent: Africa (South Africa) and Australasia. Checklist records: Australia (in mallee areas of southern Australia (W.A., S.A. and Vic.)) and New Zealand.

Ecology: Lichenized; terricolous (scattered on soils); growing under conditions which are dry.

Thallus: Foliose (forming rosettes), irregular (subirregularly to subdichotomously branched), lobed; lobes linear (sublinear), imbricate (loosely imbricate); separate thallus parts.7-1.5-(6) mm wide. Thallus Size and Differentiation: 4-6 cm in diameter. Upper Surface: Yellow or lime green (lobe margins often black), matt or glossy (shiny), smooth; immaculate; wrinkled (becoming rugulose); not isidate; not sorediate; lobulate (lobules in thallus centre, extensively branched, ascending, subterete to cylindrical, 0.2-0.4 mm wide, sometimes tipped with black at apices). Lower Surface: Present (+/- canaliculate), pale brown (pale brown to tan, shiny); attached by holdfasts (unattached to loosely adnate); wrinkled (rugose); rhizinate; rhizines sparse or moderately abundant, black or brown, not branched (tufted) or branched, dichotomously branched (or palmately branched).

Reproduction Strategy: Only known as sterile, asexually reproducing form (not seen in Australia material).

Secondary Metabolites: Present; constictic acid, norstictic acid, stictic acid (stictic acid (major) and cryptostictic acid (trace)), and usnic acid, metabolite(s) of unresolved identity: absent or present.

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

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