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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 alboflava (Körb.) Arnold, Lecidea virescens Müll.Arg.; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Körber G.W., Systema Lich. Germaniae 254 (1861); Nowak J., Tobolewski Z., Porosty Polskie (Warszawa & Kraków) 545 (1975); type specimen label data: Poland: "Sudeten" [no locality], G.W. Koerber (L-Koerb, holotype).

Taxonomic Literature: Taxonomic notes: A critical taxon of the Lecidea lapicida-complex; variability of characters insufficiently known. Hertel H., Biblioth. Lichenol. 58: 173 (1995).

Thallus: Not subdivided parts, areolate (primarily areolate) (sometimes almost bullate), continuous throughout; lobes angular or rounded at the front; separate thallus parts.45-1.5 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: White, lemon (citrine), brownish yellow, grey, or brown (beige to yellow-brown), plane or convex; not sorediate; without thalloconidia thalloconidia.

Upper Cortex: Epicortex present (no pigment layer). Medulla: Iodine reaction in Lugol's solution positive.

Ascocarps: Forming on the pro- or hypothallus, soon sessile, slightly constricted at the base, 10-60 per cm², .8-1.6-(2.5) mm in diam.. Margin: Not flexuose, persistent to excluded, 35-70 µm wide, epruinose. Disk: Weakly convex to strongly convex, black, epruinose, pruina scarce to abundant, without an umbo. Exciple: Hyphae radiating outwards; 2.5-3.5 µm wide; grey; not inspersed with crystals to inspersed with crystals. Epithecium: Apical cells olive to green, cell pigment reacting with 10% HCl (in H2O). Hymenium: 45-87 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 0-70 µm high; white. Hypothecium: White to brownish yellow to brown to dark brown.

Ascospores: Ellipsoid, (8)-10.5-13.8-(18) µm long, (4.3)-5.6-6.7-(8) µm wide; wall not ornamented.

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

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