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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. Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Zahlbruckner A., Bull. Torrey Bot. Club 27: 644 (1900); type specimen label data: USA, Southwestern California, Santa Monica Range above Hollywood, (270 m), 1899, H.E. Hasse (W, holotype).

Taxonomic Literature: Magnusson A.H., Acta Horti Gothob. 10: 38-39 (1936); Culberson F.H., Hertel H., Bryologist 75: 374 (1972); Hertel H., Decheniana 127: 63 (1975).

Ecology: Biotroph; lichenized; normally endosubstratic or episubstratic; substrate non-calciferous.

Thallus: Not subdivided parts, areolate (primarily areolate); lobes angular at the front; separate thallus parts 0-.25 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: White, plane; not sorediate; without thalloconidia thalloconidia.

Ascocarps: Soon sessile, slightly constricted or strongly constricted at the base, .5-1.2-(1.1) mm in diam.. Margin: Not flexuose, persistent, 70-110 µm wide, epruinose. Disk: Plane, black, epruinose, without an umbo. Exciple: Grey; inspersed with crystals. Epithecium: Apical cells olive, cell pigment reacting with 10% HCl (in H2O). Hymenium: 50-55 µm high; white. Subhymenium: 0-10 µm high; white. Hypothecium: White.

Ascospores: Ellipsoid, (12)-13-13.4-(14.5) µm long, (5.5)-5.8-6.2-(7) 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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