Lecanora novaehollandiae
Description : Thallus crustose, uniformly closely attached, continuous to areolate, coarsely to minutely verrucose, yellow-white to grey-white, without pruina, with or without granular soredia. Prothallus lacking or grey-white at margins. Apothecia scattered, solitary or 2–3-together, rounded or deformed through mutual pressure, 0.5–1.0(–1.5) mm diam. Thalline margin concolorous with thallus, thin to thick, smooth, crenulate to verrucose. Disc plane, orange-brown, epruinose. Epithecium 10–15 μm tall, yellow-brown to red-brown, granular at surface. Hymenium colourless, 75–85 μm tall. Asci clavate, 60–70 × 12–16 μm. Ascospores broadly ellipsoidal, 12.5–15.5 × 8.5–10.5 μm.
Chemistry : Thallus and apothecial margin: K+ yellow, C−, KC−, Pd+ orange; containing atranorin and pannarin (major); chloroatranorin, argopsin, methyl virensate and unidentified compounds (minor).
N: Northland (Waiwera Hill Scenic Reserve). On Metrosideros excelsa bark in lowland, northern coastal forest. Known also from E Australia in mainly upland rainforest from northern New South Wales to Queensland (Lumbsch 1994: 120; McCarthy 2003c, 2006; Lumbsch & Elix 2004).
Australasian
Illustration : Lumbsch (1994: 119, fig. 64A–C).
Lecanora novaehollandiae is characterised by: the corticolous habit; the areolate to verrucose, yellow-white thallus, with or without granular soredia; the orange-brown, epruinose apothecia; broadly ellipsoidal ascospores, 12.5–15.5 × 8.5–10.5 μm; and atranorin and pannarin (Pd+ orange).
