[Lecidea enterochlora Taylor, more, Lecidea parasema var. prasinula Wedd., Lecidea prasinula (Wedd.) B. de Lesd., Lecidea prasinula f. major B. de Lesd., Lecidea prasinula f. prasinula (Wedd.) B. de Lesd., Lecidea scabra Taylor, Lecidea scabra f. scabra Taylor, Lecidella prasinula (Wedd.) Hertel 1980]
Thallus: crustose, strongly rimose to areolate, 0.1-0.3 mm thick; prothallus: absent surface: yellowish white to dirty grayish yellow, pulverulaceous, dull, sorediate soredia: granular, 20-40 µm in diam., in yellowish to greenish white soralia up to 1.2 mm in diam. Apothecia: absent (not seen) or present, semi-immersed to sessile, slightly constricted at base, 0.7-1.6 mm in diam. disc: black to sometimes blackish brown (if damaged ?), plane to weakly convex, epruinose margin: thin, 0.05-0.075 mm wide exciple: hyaline to strongly black, or rarely greenish black, without algal cells parathecium: brown to reddish brown, sometimes with crystals epihymenium: bright green to blackish green, or rarely olive (if damaged ?) hymenium: hyaline to sometimes greenish hyaline, 50-80 µm tall, not inspersed; paraphyses: simple, rarely anastomosing or branched, slightly thickened apically hypothecium: brown to reddish brown asci: clavate, lecanoral, 8-spored ascospores: hyaline, simple, broadly ellipsoid to ovoid, 10-18 x 6-10 µm; wall: thick and smooth, not halonate Pycnidia: not seen Spot tests: thallus surface K+ yellow to rarely K-, C+ yellowish red, P+ yellow to rarely P- Secondary metabolites: 4,5-dichloro-3-O-methylnorlichexanthone, 4,5-dichloronorlichexanthone, arthothelin (2,4,5-trichloronorlichexanthone), asemone (=4,5,7-trichloronorlichexanthone), atranorin, chloroatranorin, thiophanic acid (=2,4,5,7-tetrachloronorlichexanthone), and thuringione (=2,4,5-trichloro-3-O-methylnorlichexanthone). Substrate and ecology: on non-calciferous rocks World distribution: Europe and North America Sonoran distribution: southern California in the Channel Islands.