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Xanthoparmelia convoluta (Kremp.) Hale

Data Set Maintenance: Data set compiled (Flora of Australia Vol. 55 Lichens-Lecanorales, Parmeliaceae). Data set author(s): Nöske, N. M. @EXCL@ Clerc, P. (04-10-27). Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Currently accepted name Xanthoparmelia convoluta (Kremp.) Hale. Xanthoparmelia. Synonyms: Parmelia vagans f. convoluta (Kremp.) Gyeln.
Parmelia camtschadalis auct. non Ach.
Xanthoparmelia camtschadalis (Ach.) Hale;
Parmeliaceae Zenker (1827); Lecanorineae; Lecanorales.

Type Information: Basionym: Parmelia convoluta Kremp. Type: Xanthoparmelia convoluta (Kremp.) Hale.

Taxonomic Literature: Phytologia 28: 487 (1974).

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

Ecology: Biotroph; lichenized; terricolous (on bare earth in mallee scrub); growing under conditions which are dry (drier areas of southern S.A. and western Vic.).

Thallus: Foliose, subdivided into main (strongly convolute, contorted) parts, isotomic-dichotomous (sparsely dichotomously branched), lobed; lobes elongate (and sublinear); branches applanate (moderately flattened); separate thallus parts 3.5-8 mm wide. Thallus Size and Differentiation: 2-6 cm in diameter. Upper Surface: Lime green (pale yellow-green, darkening in older central lobes), matt, smooth (becoming rugulose and cracked in older lobes); immaculate; not isidate; not sorediate; lobulate (marginal and laminal lobules sometimes present in older lobes). Lower Surface: Present, brown (pale brown to dark brown); not attached, thallus vagrant; rhizinate; rhizines sparse (very sparse), brown (concolorous with lower surface), not branched.

Medulla: White.

Reproduction Strategy: With sexual (and possible asexual) stages (shortly pedicellate). Ascocarps: Apothecioid, sparse, up to 4 mm in diam.. Margin: Crenulate (incised), distinct (thick, markedly involute). Disk: Excavate, brown (dark brown).

Ascospores: 10-11 µm long, 6 µm wide.

Conidiomata: Present (rare).

Conidia: Bifusiform; 6-7 µm long; .5 µm wide.

Secondary Metabolites: Present; throughout the thallus medulla, consalazinic acid, salazinic acid, and usnic acid.

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

UV-Fluorescence: Upper thallus surface – (negative).

(report generated 04.Okt.2007)

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