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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 40. Ochrolechia. Pertusariaceae Körb. (1855); Pertusariineae; Lecanorales.

Taxonomic Literature: Awasthi D.D. & Tewari R., Kavaka 15: 23-27 (1987); Brodo I.M.,
Can. J. Bot. 69: 733-772 (1991); Clauzade G. & Roux C., Bull.
Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [529-532]
(1985); Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-662
[321-323], Wellington (1985); Hanko B., Leuckert, C. & Ahti T.,
Nova Hedwigia 42: 165-199 (1986) ["1985"]; Howard G.E., Bryologist
73: 93-130 (1970); Poelt J., Khumbu Himal 1: 251-261 (1966); Purvis
O.W. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain
and Ireland, London (1992); Verseghy K., Beih. Nova Hedwigia 1: 1-46,
12 pl. (1962).

Biogeography: Checklist records: Austria, Germany, Great Britain, Guianas, Italy, New Zealand, Sonoran Desert, Sweden and Norway, Thailand, United States and Canada (continental), and Republic of South Africa.

Ecology: Biotroph; lichenized; terricolous, bryophytic, lignicolous, or corticolous; substrate non-calciferous.

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

Thallus: Crustose, not subdivided parts, squamulose, granular, rimose, or areolate (primarily areolate). Upper Surface: Grey or brownish yellow; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate or isidiate; not sorediate or sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular or irregular, forming all across the thallus surface, soon sessile. Margin: Prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells black or brownish yellow. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: White.

Ascospores: 1–2 to c. 8 per ascus, broadly ellipsoid or ellipsoid, 29-75 µm long, 13-41 µm wide, obtuse; septa absent; wall thin, not thickened at the septum, laterally constricted where the septum meets the spore wall, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial; immersed or stipitate.

Secondary Metabolites: Present, of the following substance class(es): orcinol depsides, orcinol depsidones, ß-orcinol depsides, ß-orcinol depsidones, (higher) aliphatic acids, and xanthones.

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