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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: L. planata Müll.Arg. Lecidea plana Kremp. nom. illegit., Psora endochlora Müll.Arg.; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Persoon C.H. in Gaudichaud-Beaupré C., Voyage Uranie, Botan. 193 (1826); type specimen label data: Australia, Western Australia, Wallangering, 24 November 1891, R. Helms 72 (MEL 6898, neotype).

Thallus: Not subdivided parts, areolate (primarily areolate), continuous throughout; lobes angular at the front; separate thallus parts.1-.3 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, or grey, plane; not sorediate; without thalloconidia thalloconidia.

Ascocarps: Soon sessile, slightly constricted at the base, 20-70 per cm², .5-1.3-(2) mm in diam.. Margin: Not flexuose, persistent or excluded, 55-120 µm wide, epruinose. Disk: Plane to strongly convex, black, epruinose, without an umbo. Exciple: Hyphae radiating outwards; 2-3.5 µm wide; grey or pale brown; not inspersed with crystals or inspersed with crystals. Epithecium: Apical cells olive or green, cell pigment HCl+ blue. Hymenium: 60-85 µm high; white; iodine reaction: Lugol’s positive (bluish brown), hemiamyloid. Subhymenium: 12-30 µm high; white. Hypothecium: Brown.

Ascospores: Ellipsoid, (8.5)-13.1-14.3-(20) µm long, (5)-6-6.4-(8) µm wide; wall not ornamented.

Secondary Metabolites: Not detected or present, gyrophoric acid or lecanoric acid (traces).

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

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