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Physcia crispa Nyl.

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 crispa Nyl. Physcia. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Type Information: Basionym: Physcia crispa Nyl. Type: Physcia crispa Nyl.

Biogeography: Submontane. Continent: Northern America and Southern America. Checklist records: Mexico and Sonoran Desert (only from Baja California).

Ecology: Biotroph; lichenized; corticolous; episubstratic; growing sun-exposed or partially shaded; under conditions which are dry or moist.

Thallus: Foliose, subdivided into main parts, lobed; lobes ascending (at the tips); separate thallus parts up to 1 mm wide; thin; up to.15 mm thick. Thallus Size and Differentiation: Up to (3) cm in diameter; apex curved upwards; rounded (not rounded but crenulate). Thallus Outline: Irregular or orbicular; soon disappearing. Upper Surface: Grey (to cream) or pale grey, smooth; immaculate; rarely pruinose; pruina scarce; whitish; eciliate; without hairs; not isidate (but with isidiate protrusions along the margin becoming sorediate); with isidiomorphs; sorediate; soralia peripheral; not blastidiate; not schizidiate; not lobulate. Lower Surface: Present, white, firmly attached attached; attached by holdfasts (true rhizines); rhizinate; rhizines sparse, pale grey or white, without projections, not 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: Sometimes with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, soon sessile or substipitate, up to 2 mm in diam.. Margin: Lecanorine (with soralia), persistent, distinct. Disk: Plane; brown (to pale brown); epruinose. Epithecium: With epithecium; apical cells subulate (clavate with dark brown cap). 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)-20-25-(27) µm long, (8)-8-11-(13) 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: 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 – C –, KC –, PD – soredia: K – KC –.

(report generated 13.Nov.2007)

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