Rinodina inflata
Description : Thallus epiphytic, areolate, of discrete, crenulate squamules, 0.1–1 mm diam., whitish to grey, sorediate. Soralia erupting from margins and upper surface of squamules, eventually covering surface of squamules. Apothecia lecanorine, scattered, solitary, rarely in groups, 0.3–0.8 mm diam., thalline margin concolorous with thallus, prominent, smooth, swollen; disc brown to dark-brown, epruinose. Epithecium red-brown, 10–15 μm thick. Hymenium 85–95 μm tall. Paraphyses simple to 1.5 μm thick, apices swollen to 4–6 μm diam. Hypothecium colourless, 50–55 μm thick. Asci Lecanora -type. Ascospores Pachysporaria -type, spore ontogeny type A, torus well-developed slightly constricted at septum, (20–)22–28(–30) × 10–15(–18) μm, wall strongly scabrid. Pycnidia immersed. Conidia bacillar, 6–8 × 1 μm.
Chemistry : Thallus and soralia K+ yellow, C−, KC−, Pd−; containing atranorin.
S: Canterbury (Hanmer State Forest). On bark of Picea abies and Salix. Known also from Austria (Kalb 1976; Giralt et al. 1993b; Hafellner & Türk 2001).
?Cosmopolitan
Illustrations : Kalb (1976: 79); Edler (2002: 49, fig. 13; 52, fig. 14H).
Rinodina inflata is characterised by: the corticolous habit; the large, subsquamulose areolae to 1 mm diam.; soralia erupting from margins and upper surface of areolae; ascospores of Pachysporaria -type, with a well-developed torus, (20–)22–28(–30) × 10–15(–18) μm; conidia bacillar, 6–8 × 1 μ; and atranorin in the thallus.
