Xanthoparmelia pustuliza
≡Parmelia pustuliza Elix, Austral. J. Bot. 29: 367 (1981).
Description : Thallus tightly adnate on rock, 3–5 cm diam. Lobes imbricate or not, sublinear-elongate, irregularly to subdichotomously branched, 0.5–1.5(–2) mm wide. Upper surface yellow-green, plane, glossy, emaculate, often with transverse cracks, isidiate, lobe margins black. Isidia globose, coarse, short, appearing granular, apices epicorticate, erumpent, forming pustular or coarsely subsorediate masses. Lower surface plane, matt, black, rhizinate. Rhizines moderately dense, simple, black. Apothecia sessile, 1–3 mm diam., disc concave, dark-brown; thalline exciple smooth. Ascospores 6–9 × 3.5–5.5 μm. Pycnidia not seen.
Chemistry : Cortex K−; medulla K+ yellow→dark-red, C−, KC−, Pd+ yellow; containing usnic, norstictic, connorstictic, ±hypostictic (tr.), ±hyposalazinic (tr.) and ±constipatic (tr.) acids.
N: S: Otago (Central Otago). On smooth, moist, rock surfaces in mountainous areas. Known also from Australia and Tasmania (Elix 1994s: 282; McCarthy 2003c, 2006).
Australasian
Illustrations : Hale (1990: 182, fig. 61E); Elix (1994s: 280, fig. 103D); Kantvilas et al. (2002: 166).
Xanthoparmelia pustuliza is characterised by: the saxicolous habit; erumpent isidia which become pustulate and coarsely subsorediate; a black lower surface; and norstictic and connorstictic acids in the medulla.
