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Lecanora swartzii ssp. caulescens (J. Steiner) Leuckert & Poelt

Data Set Maintenance: Data set standard item. Data set author(s): Lumbsch H. T. & Guderley R. (98-09-01). Data set to be published after submission; 98-09-01.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Lecanora. Lecanoraceae Körb. (1855).

Taxonomic Literature: Leuckert, C. & Poelt J., Nowa Hedwigia 49: 121-167 [164-165] (1989).

Biogeography: Continent: Asia-Temperate and Europe.

Ecology: Substrate non-calciferous.

Thallus: Areolate (primarily areolate), bullate or subsquamulose; separate thallus parts thick. Thallus Outline: Arachnoid; indistinct; white. Upper Surface: Pale grey, pale brown, or grey, matt or glossy (shiny), smooth; epruinose; wrinkled; not sorediate.

Upper Cortex: Gelatinized.

Ascocarps: Strongly constricted at the base. Margin: Lecanorine, verruculose or crenulate, smooth, not flexuose, excluded, indistinct to distinct, concolourous with the surrounding thallus; without a thin rim between disk and thalline margin. Disk: Weakly convex, brown, pruina abundant. Parathecium (proper excipulum): White, dissolving in 10% KOH. Amphithecium (thalline excipulum): Present; crystals small, not dissolving in 10% KOH; photobiont abundant. Amphithecial Cortex: Present, distinctly developed, eucortical, 15-20-25 µm wide, basally widened, 20-35-50 µm wide at the base; inspersed with oil droplets. Episamma: Soluble in KOH. Epithecium: Apical cells slightly swollen, hyaline or dark brown, soluble in 10% KOH. Hymenium: Not inspers. Hypothecium: White; not inspers.

Ascospores: c. 8 per ascus, ellipsoid, (9)-9.5-11.5-13.5-(14) µm long, 6-6.7-7.5-(8) µm wide; wall thin, not ornamented.

Secondary Metabolites: Atranorin, sordidone, and roccellic acid, of the following substance class(es): orcinol depsides, chromones, and (higher) aliphatic acids.

Spot Tests: Upper surface: C + orange, PD –.

(report generated 04.Okt.2007)

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