[Modified from Kalb et al. 2018] Thallus crustose, whitish gray to lead gray, continuous, smooth or uneven, dull or rarely slightly glossy; vegetative diaspores absent. Photobiont trentepohlioid alga. Ascomata lirellae, erumpent to prominent, with thick lateral thalline margin, short to elongate, straight, curved or sinuous, sparsely branched; labia convergent, entire, black, epruinose; disk concealed (marginata-morph). Exciple laterally carbonized; hymenium inspersed. Asci (2–)4–8-spored; ascospores hyaline, transversely 11–21-septate, 50–100 × 10–12 μm, rarely the last locules with 1 longitudinal septum, with halo, laterally up to 1 μm thick, up to 6 μm thick at both ends.
Chemistry. No substances detected by TLC.
Substrate and Habitat. Corticolous on hardwood trees.
Distribution. Southeastern Asia (Thailand) - southeastern North America; in North Carolina found in the Coastal Plain ecoregion.
Literature
Kalb, J., R. Lücking & K. Kalb. (2018) The lichen genera Allographa and Graphis (Ascomycota: Ostropales, Graphidaceae) in Thailand – eleven new species, forty-seven new records and a key to all one hundred and fifteen species so far recorded for the country. Phytotaxa377(1): 1-83.
Lücking, R., A.W. Archer & A. Aptroot (2009) A world-wide key to the genus Graphis (Ostropales: Graphidaceae). Lichenologist41(4): 363-452.
Vainio, E.A. (1921) Lichenes in summo monte Doi Sutep (circ. 1675 m.s.m.) in Siam boreali anno 1904 a D:re C.C. Hosseo collecti. Annales Botanici Societatis Zoologicae Botanicae Fennicae "Vanamo"1(3): 33-55 (original description).