TYPE. CHINA. Sichuan, “Prov. Setschwan austro-occid.: In jugi Döko supra monasterium Muli ad septentr. pagi Yünnanensis Yungning regione alpina, ince, spite compacto. Substr. schisto argilloso; alt. s. m. ca. 4350 m”, 4.VIII.1915, H.R.E. von Handel-Mazzetti 7399 (WU, holotype; DUKE, S, isotypes).

Description. Life form: lichenized fungus.

Thallus foliose, loosely attached, gray, orbicular, 7-16 cm diam.; lobes (5-)10-15 mm wide; upper surface shiny, smooth with laminal pseudocyphellae. Pseudocyphellae usually small and raised, sometimes associated with larger as well as small and not raised pseudocyphellae Vegetative diaspores soredia in soralia; soralia often coarse and irregular in shape with soredia usually > 40 μm diam. Lower surface black, reddish brown near tips; rhizines sparse, simple, black. Photobiont trebouxioid green alga. Ascomata and conidiomata not known.

Chemistry. Cortex K+ yellow, C-; medulla K-, KC-; atronorin, imbricaric, 4-O-demethylimbricaric and anziaic acids.

Substrate and Habitat. Corticolous on tree trunks in forests.

Distribution. Asia, Europe, North America; in North Carolina found in the Blue Ridge. ecoregion.

Note. Hinds & Hinds (2007) considers this taxon to be a synonym of C. cetrarioides, “as part of C. cetrarioides s. lat.”, separated only by chemistry with the presence of imbricaric acid.

Literature

Kukwa, M., M. Pietnoczko & K. Czyzewska (2012) The lichen family Parmeliaceae in Poland. II. The genus Cetrelia. Acta Societatis Botanicorum Poloniae 81(1): 43-52.

Handel-Mazzetti, H. (1930) Symbolae Sinica 3: 1-254 (original description as Parmelia monachorum).

Hinds, J.W. & P.L. Hinds (2007) The Macrolichens of New England. Memoirs of the New York Botanical Garden No. 96. New York Botanical Garden Press, Bronx, New York. 584 pp.