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Lecanora stramineoalbida Vain.

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., Guderley, R. & Elix, J.A., Bryologist 99: 269 291[285] (1996).

Biogeography: Continent: Northern America and Southern America.

Ecology: Corticolous.

Thallus: Areolate (primarily areolate); separate thallus parts thin. Thallus Outline: Indistinct; soon disappearing. Upper Surface: Verrucose or verruculose, lemon (citrine) or pale grey, matt, smooth; epruinose; not sorediate.

Upper Cortex: Gelatinized.

Ascocarps: Soon sessile. Margin: Lecanorine, verrucose or verruculose, smooth, slightly flexuose, persistent, indistinct or prominent, concolourous with the surrounding thallus; without a thin rim between disk and thalline margin. Disk: Plane, brownish yellow, pruina scarce. Parathecium (proper excipulum): White, dissolving in 10% KOH. Amphithecium (thalline excipulum): Present; crystals dissolving in 10% KOH; photobiont abundant. Amphithecial Cortex: Present, distinctly developed, eucortical, 15-20-25-(30) µm wide, basally widened, 20-45-70-(75) µm wide at the base; inspersed with oil droplets. Episamma: Soluble in KOH. Epithecium: Apical cells not swollen, hyaline or dark brown, soluble in 10% KOH. Hymenium: Not inspers. Hypothecium: Brownish yellow or brownish red; not inspers.

Ascospores: c. 8 per ascus, ellipsoid, 11-12.8-14.5-(15) µm long, (6)-6.5-7.8-9 µm wide; wall thin, not ornamented.

Secondary Metabolites: 2'-O-methylperlatolic acid and atranorin, of the following substance class(es): orcinol depsides.

Spot Tests: Upper surface: C –, PD –.

(report generated 04.Okt.2007)


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