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Data Set Maintenance: Data set standard item. Data set author(s): Hertel H. (99-01-01). Data set not revised.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: species. Lecidea. Synonyms: Lecidea decorosa Arnold, Lecidea subcretacea (Arnold) Sydow; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Nylander W., Flora 68: 44 (1885); type specimen label data: France, Dépt. Hautes Pyrenées, Cirque de Gavarnie, July 1884, E. Lamy (H-Nyl 15639, holotype).

Taxonomic Literature: Hertel H., Beih. Nova Hedwigia 24: 41-43 (1967); Hertel H., Herzogia 2: 48 (1970); Culberson C.F., Hertel H., Bryologist 75: 373-375 (1972); Kilias H., Hoppea 37: 120 (1978); Clauzade G., Roux C., Bull. Soc. Bot. Centre-Ouest, nouv. ser., num. spec. 7: 464 (1985); Hertel H., Biblioth. Lichenol. 58: 172 (1995).

Thallus: Not subdivided parts, areolate (primarily areolate) (eroded specimens), continuous throughout; lobes angular at the front; separate thallus parts.2-1.5 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: White or grey (pale to bluish), plane; not sorediate; without thalloconidia thalloconidia.

Ascocarps: Soon sessile, slightly constricted at the base, .6-2-(3) mm in diam.. Margin: Not flexuose, persistent or excluded, 25-120 µm wide, epruinose. Disk: Weakly convex to strongly convex, black, epruinose, without an umbo. Exciple: Grey or rarely pink (rosé); inspersed with crystals. Epithecium: Apical cells olive, green, or turquoise, cell pigment reacting with 10% HCl (in H2O). Hymenium: 45-65 µm high; white or normally pale green; iodine reaction: Lugol’s positive. Subhymenium: 10-40 µm high; white or pale green. Hypothecium: Brownish yellow or brown.

Ascospores: Ellipsoid, (6.5)-7.4-10-(12) µm long, (3.5)-4.1-5.3-(6) µm wide; wall not ornamented.

Spot Tests: Medulla: K –, C –, PD – ascocarp margin (in section): K –, C + red; disk: C – hypothecium: K – epihymenium: K –.

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