Nordic J. Bot. 31, 1: 48 (2013).

Basionym: Placodium cladodes Tuck., Proc. Amer. Acad. Arts & Sci. 6: 265 (1866) [1864].

Thallus: crustose to subfruticose, areolate or elongate lobed, with elongated lobes, 3-6 mm long, 0.2-0.5 mm wide, prothallus absent; surface orange, smooth, without asexual propagules; cortex cellular, thin, 7-55 µm, granules absent; medulla dense, without granules. Apothecia stipitate, 0.5-1.5 mm, lecanorine; disc orange, flat, epruinose; margin persistent; thalline margin present, concolorous with thallus; proper margin visible, concolorous with disc; parathecium cellular (paraplectenchymatous); exciple below hypothecium prosoplectenchymatous; epihymenium golden, K+ red, H-, 10%N-, cN-, C-; hymenium hyaline, 70-85 µm tall; paraphyses 2-3 tip cells slightly swollen, with some branching; subhymenium hyaline. Asci cylindrical, 8-spored. Ascospores hyaline, 2 locules, ellipsoid, 12.5-7 x 5.5-7 µm, isthmus 1.5-3 µm, spore end wall thin. Pycnidia present, totally immersed, ostiole orange (Nash et al. 2001: xx)

Photobiont: Data lacking.

Chemistry: Apothecial margin K+ red, H-, 10% N-, cN-, C-; thallus K+ red, H-, 10%N-, cN-, C-; medulla IKI+ blue; parietin, fallacinal, emodin, and teloschistin. Nash et al. (2001: xx).

Ecology: On non-calcareous rocks