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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Moberg R. (95-11-28); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 2. Phaeorrhiza. Physciaceae Zahlbr. (1898); Lecanorineae; Lecanorales.

Taxonomic Literature: Hafellner J., Mayrhofer H., Poelt J., Herzogia 5: 39-79 (1979); Huneck S., Schmidt J. & Mayrhofer M., Herzogia 8: 137-139 (1989); Poelt J. & Vezda A., Biblioth. Lichenol. 16: 1-390 [245-246] (1981); Mayrhofer H. & Poelt J., Nova Hedwigia 30: 781-798 (1978); Rambold G., Mayrhofer H. & Matzer M., Pl. Syst. Evol. 192: 31-40 (1994).

Biogeography: Checklist records: Austria, Germany, Sonoran Desert, Italy, Sweden and Norway, and United States and Canada (continental).

Lichen Photobionts: Primary photobiont present; chlorococcal. Secondary photobiont absent.

Thallus: Crustose, not subdivided parts, squamulose or placodioid. Thallus Outline: Soon disappearing. Upper Surface: Brown, brownish yellow, or olive; special structures absent. Lower Surface: Attached by holdfasts; special structures present:; not pseudocyphellate; not cyphellate; rhizinate; without thalloconidia thalloconidia; not cavernulate; tomentose.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile. Margin: Indistinct to prominent; external filaments absent. Exciple: White or brownish yellow. Periphyses: Absent. Epithecium: Apical cells brown. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Brown or white to brownish yellow.

Asci: Tholus thickened, amyloid, with non-amyloid wide axial body and divergent amyloid flanks towards apex; dehiscence lecanoralean.

Ascospores: c. 8 per ascus, ellipsoid, 17-22 µm long, 8-10 µm wide, obtuse; septa present; transversally septate, 1-transversally septate; wall thin, not thickened at the septum to thickened at the septum, dark brown, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed to present; pycnidial; immersed, formed all accross the thallus surface.

Secondary Metabolites: Present, of the following substance class(es): orcinol depsidones to (tri-)terpenoids.

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