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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: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 10. Vezdaea. Vezdaeaceae J.C. David & D. Hawksw. (1991); family of unknown placement (incertae sedis); Lecanorales.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-220 [208-209] (1997); Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest, N.S. 7: 1-893 [816] (1985); Coppins B.J., Lichenologist 19: 167-176 (1987); Giralt M., Poelt J. & Suanjak M., Herzogia 9: 715-724 (1993); Poelt J. & Vezda A., Biblioth. Lichenol. 9: 1-258 [257-258] (1977); Purvis O.W. in: Purvis O.W., Coppins B.J., Hawksworth D.L., James P.W. & Moore D.M. (eds), The lichen flora of Great Britain and Ireland: 1-710 [642-644] (1992); Rambold G. & Triebel D., Biblioth. Lichenol. 48: 1-201 [134] (1992).

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

Ecology: Biotroph; lichenized or lichenicolous; terricolous, bryophytic, or epiphyllous; substrate non-calciferous.

Lichen Photobionts: Primary photobiont present. Primary photobiont taxonomy: Leptosira (A. Beck 22-05-97); genus incertae sedis; Leptosira-group, Trebouxiophyceae, Eukariota. Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts, leprose or granular. Upper Surface: Brown, green, grey, or olive; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate; not cephalodiate; not lobulate; without granules or with 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 to stipitate. Margin: Indistinct; external filaments absent. Periphyses: Absent. Epithecium: Apical cells hyaline. Interascal Hyphae: Absent or present, distinctly branched, distinctly anastomosed.

Asci: Tholus thickened, amyloid, with amyloid tube or with amyloid cap; dehiscence lecanoralean.

Ascospores: c. 8 or more than 32 per ascus, ellipsoid, oblong, or filiform, 10-85 µm long, 1-11 µm wide, obtuse or aciculate; septa present; transversally septate, 1-11-transversally septate; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented or ornamented.

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