Botanische Staatssammlung München © 1995–2008
Data remain intellectual property of the data set authors.

Physcia rolfii Moberg

Data Set Maintenance: Data set compiled (from Sonoran Desert Lichen Flora Vol. 1). Data set author(s): Bungartz F. (02-02-21).

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

Type Information: Basionym: Physcia rolfii Moberg. Type: Physcia rolfii Moberg.

Biogeography: Submontane and montane. Continent: Northern America and Southern America. Checklist records: Mexico and Sonoran Desert.

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

Thallus: Foliose, subdivided into main parts, usually dispersed throughout and distinctly seperate, lobed; lobes convex; not imbricate (wider lobes sometimes overlapping); separate thallus parts narrow. Thallus Size and Differentiation: Up to 5 cm in diameter. Thallus Outline: Irregular or orbicular. Upper Surface: Maculate (whitish); more or less pruinose; eciliate; without hairs; not isidate; sorediate; soralia peripheral (situated in the lobe sinuses), sometimes helmet-shaped or sometimes labriform (semicircular to upwardly curved), erose; not blastidiate; not schizidiate; not lobulate. Lower Surface: Present, white or pale brown (to brownish), firmly attached attached; attached by holdfasts (true rhizines); rhizinate; rhizines more or less abundant, grey, brownish brown, or white (for all 2, 6 and 8: of same colour or darker than lower surface), without projections or with projections (rhizines simple to sparsely furcate), sparsely furcate; not sorediate; not tomentose.

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

Reproduction Strategy: With sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, soon sessile or substipitate, moderately abundant or abundant, up to 1 mm in diam.. Margin: Lecanorine, persistent, distinct; sometimes sorediate; not isidiate; not ciliate; not hirsute. Disk: Plane; often pruinose, pruina white. 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.

Ascospores: Pachysporaria-type, c. 8 per ascus, ellipsoid, (16)-19.5-24-(25) µm long, (7.5)-8.5-11-(14) 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; throughout the thallus medulla (atranorin, zeorin and some unknown triterpenes), atranorin or hopane-6a,22-diol, metabolite(s) of unresolved identity: present (triterpenes).

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

(report generated 13.Nov.2007)

In case that additional characters and states are required to be included in this data set, consult the LIAS Instructions to Participants and follow the procedures described there.