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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. (06-05-11). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Xanthoparmelia isidiosa (Müll. Arg.) Elix & J. Johnst. Xanthoparmelia. Synonyms: Parmelia conspersa var. stenophylla f. isidiosa Müll. Arg.
Parmelia isidiosa (Müll. Arg.) Hale
Parmelia refringens Kurok. & Filson
Xanthoparmelia refringens (Kurok. & Filson) Hale
(Parmelia conspersa var. isidiosa auct. non Nyl. = Xanthoparmelia tinctina (Maheu & A. Gillet) Hale)
(Parmelia tinctina auct. non Maheu & A. Gillet = Xanthoparmelia tinctina (Maheu & A. Gillet) Hale); Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Parmelia conspersa var. stenophylla f. isidiosa Müll. Arg.

Biogeography: Southern hemispheric. Continent: Australasia. Checklist records: Australia (common and widespread, endemic; W.A., N.T., S.A., Qld, N.S.W. and Tas.).

Ecology: Lichenized; saxicolous; growing under conditions which are dry (in arid and subarid areas).

Thallus: Foliose (small foliose to subcrustose), irregular, lobed; lobes imbricate (or not); plane; separate thallus parts.8-1.5 mm wide. Thallus Size and Differentiation: Up to 5 cm in diameter. Upper Surface: Lemon (citrine) or lime green, matt; fissurate; fissures not particularly oriented (older lobes irregularly cracked and becoming areolate) oriented; immaculate; isidiate (isidia apices epicorticate, becoming inflated but rarely erumpent and not sorediose); isidia globular or cylindrical, ramified (commonly branched); not sorediate. Lower Surface: Present, black; attached by holdfasts (tightly adnate); rhizinate (0.3-0.8 mm long); rhizines sparse, black, not branched.

Reproduction Strategy: With sexual (and possible asexual) stages (rare, subpedicellate). Ascocarps: Apothecioid, up to 6 mm in diam.. Margin: Distinct (involute, lacerate); isidiate. Disk: Urceolate, dark brown.

Secondary Metabolites: Present; consalazinic acid, salazinic acid (major), and usnic acid.

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

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