Lecanora oreinoides
≡Aspicila oreinoides Körb., Abh. schles. Ges. vaterl. Cult. Abth. Naturwisws 2: 32 (1862).
Description : Thallus areolate, white, tartareous, 0.3–0.7 mm thick, in spreading patches 1–5 cm diam., delimited at margins and between areolae by a black prothallus. Areolae angular, plane, smooth, 0.5–1 mm diam. Medulla I ±brown. Apothecia scattered to crowded, rounded, 0.2–0.4(–0.6) mm diam., immersed, aspicilioid, disc plane, black, matt, epruinose. Thalline exciple reduced. Hymenium colourless, I+ blue, 50–80 μm tall; epithecium grey-green to green-black, 8–12 μm thick, unchanged in K. Hypothecium colourless, 80–120 μm thick. Asci 30–40 × 8–14 μm. Ascospores ellipsoidal, 7–11(–13) × 3.5–6(–6.5) μm. Pyncnidia scattered, immersed. Conidia cylindrical, 8–15 × 0.8–1 μm.
Chemistry : Cortex K+ yellow, C−, KC+ yellow, Pd ±yellow; containing atranorin and confluentic acid (Rambold 1989: 101).
St: (The Paps, South Cape). On exposed granite rock outcrops in subalpine grassland. Associating with Amandinea lecideina, Labyrintha implexa, Rimularia psephota and Schaereria fabispora. Known also from North America, Brazil, Africa, Asia, Hawai'i (Hertel 1971a, 1977a; Aptroot 2002e; Ryan et al. 2004b: 249) and Australia (Rambold 1989; McCarthy 2003c, 2006; Lumbsch & Elix 2004).
Cosmopolitan
Illustrations : Rambold (1989: 102, fig. 9); Flora of Australia56A (2004: xiv, pl. 16).
Lecanora oreinoides is characterised by: the saxicolous habit; the thick, white, tartareous thallus; the black immersed, aspicilioid apothecia; a green epithecium; a colourless hypothecium; ellipsoidal ascospores, 7–11(–13) × 3.5–6.5 μm; cylindrical conidia, 8–15 × 0.8–1 μm; and a chemistry of atranorin and confluentic acid.
