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Physcia neglecta Moberg

Data Set Maintenance: Data set compiled (from Sonoran Lichen Flora Vol.1). Data set author(s): Bungartz F. (02-02-07). Data set to be published after submission; February 2002.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: species. Currently accepted name Physcia neglecta Moberg. Physcia. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Basionym: Physcia neglecta Moberg. Type: Physcia neglecta Moberg.

Biogeography: Subtropical; colline and submontane. Continent: Northern America. Checklist records: Mexico and Sonoran Desert.

Ecology: Biotroph; lichenized; saxicolous (especially sandstone); episubstratic; growing sun-exposed or partially shaded; under conditions which are dry or moist.

Thallus: Foliose, subdivided into main parts, lobed; lobes with parallel margins; subconcave or plane; separate thallus parts 1-1.5 mm wide. Thallus Size and Differentiation: Up to (2) cm in diameter. Thallus Outline: Irregular or orbicular; soon disappearing. Upper Surface: Dark grey or pale grey, glossy (shiny), smooth; epruinose; eciliate; without hairs; not isidate; sorediate; soralia peripheral, soredia more or less coarse (inner parts almost isidiate); not blastidiate; not schizidiate; not lobulate. Lower Surface: Present, white; attached by holdfasts (true rhizines); rhizinate; rhizines sparse, pale grey or white, without projections, not branched or branched (rhizines simple to sparsely furcate), sparsely furcate; not sorediate; not tomentose.

Upper Cortex: Present; outer cortical layer paraplectenchymatous; inner cortical layer paraplectenchymatous. Medulla: White. Lower Cortex: Present.

Reproduction Strategy: With sexual (and possible asexual) stages (only seen in type material). Ascocarps: Apothecioid, orbicular, soon sessile or substipitate, sparse (only seen in type material), up to 1.5 mm in diam.. Margin: Lecanorine, persistent, distinct; more or less sorediate; not isidiate; not ciliate; not hirsute. Disk: Plane. Epithecium: With epithecium (simple or forked); apical cells subulate (clavate with dark brown cap), pale brown. Hymenium: White; not inspers. Interascal Hyphae: Scarcely branched (paraphyses simple or forked above). Subhymenium: White. Hypothecium: White; not inspers.

Asci: Cylindrical; dehiscence lecanoralean (Lecanora-Type).

Ascospores: Pachysporaria-type, c. 8 per ascus, ellipsoid, 18-22 µm long, 9-11 µm wide; septa present; transversally septate; 1-transversally septate; wall thickened at the septum, becoming pigmented, dark brown (at maturity) or middle brown.

Conidiomata: Present; sparse.

Conidia: Bacilliform (not bacilliform but cylindrical); 4-6 µm long; 1 µm wide.

Secondary Metabolites: Present; only in the upper part of the cortex, atranorin.

Spot Tests: Present reactions. Upper surface: K + deep yellow, C –, KC –, PD + yellow; cortex: KC + deep yellow, medulla: K + yellow; C –, KC – soredia: KC –.

(report generated 13.Nov.2007)

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