in Arup et al., Nordic J. Bot. 31, 1: 36 (2013).

Basionym: Parmelia cerina var. pyracea Ach., Methodus, Sectio post. (Stockholmiæ): 176 (1803).

Synonyms: Index Fungorum

Protolog: Data lacking.
Type locality: Germany, Persoon (H-ACH - lectotype, selected by Arup 2009: 126).
Barcode: Data lacking.
Coordinates: Data lacking.

Thallus: crustose, endoxylic, up to 1 cm. Apothecia numerous, scattered, up to 0.8 mm diam., broadly sessile. Apothecia zeorine. Disc flat, persistantly yellow to orange yellow, never olive. Margin thin, 40 µm, slightly lighter than the disc, in very young apothecia prominent, but soon level with disc. Thalline margin more greenish generally hidden below the proper margin. Amphithecium rather dense, cells about 6.5 µm long, with few algae. Parathecium thin, fan-shaped, cells elongated, 5.5 µm long. Hypothecium 15 µm, consisting of intricately interwoven hyphae, with oil droplets. Hymenium 50 µm high with fine epipsamma. Paraphyses very loose, apically branched and inflated. Apical cells up to about 5.5 µm thick. Ascospores: Asci with 8 spores. Spores small, 11-13 x 5.5-6.5 µm. Septum 3.5-4 µm thick (Søchting 1989, p. 253).

Photobiont: Data lacking.

Chemistry: No lichen substances.

Ecology: Data lacking.

Molecular data: Genbank

Distribution: Database

Note: