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Lecanora variolascens Nyl.

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 or basionymous. Taxonomic rank: species. Lecanora. Lecanoraceae Körb. (1855).

Taxonomic Literature: Lumbsch, H.T., Plümper, M., Guderley, R. & Feige, G.B., Symb. Bot. Ups. 32: 131-162 [157-158] (1997).

Biogeography: Continent: Europe.

Ecology: Corticolous.

Thallus: Rimose; separate thallus parts thin or thick. Thallus Outline: Indistinct; soon disappearing. Upper Surface: Pale grey or pale green, matt, smooth; epruinose; sorediate; soralia (.5)-.6-.8-1-(1.1) mm in diam., white, isolated, not confluent with other soralia, soredia farinose, (14)-15-18-20-(23) µm in diam..

Ascocarps: Soon sessile. Margin: Lecanorine, smooth, not flexuose or slightly flexuose, persistent, prominent, concolourous with the surrounding thallus; without a thin rim between disk and thalline margin. Disk: Plane to weakly convex, brown or brownish yellow, pruina abundant. Parathecium (proper excipulum): White, dissolving in 10% KOH. Amphithecium (thalline excipulum): Present; (60)-65-90-120 µm wide; crystals small, abundant, dissolving in 10% KOH; photobiont abundant. Amphithecial Cortex: Absent, indistinct, pseudocortical, (35)-40-55-65 µm wide, not basally widened, (35)-40-55-65 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 or broadly ellipsoid, 8.5-10.5-12-(12.5) µm long, (5.5)-6-7-8 µm wide; wall thin, not ornamented.

Secondary Metabolites: Atranorin and psoromic acid, of the following substance class(es): orcinol depsides and orcinol depsidones.

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

(report generated 04.Okt.2007)


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