TYPE. THAILAND. Chiang Mai: Doi Suthep, ad corticem arboris, 1875 m, 1904, C.C. Hosseus s.n. (TUR-Vainio 27806, lectotype designated by Lücking et al. 2009)
Description.Life form: lichenized fungus.
Thallus crustose, whitish-gray to greenish gray, smooth, dull. Photobiont trentepohlioid alga. Ascomata lirellae, prominent, with a basal (to lateral) thalline margin, elongate, straight, curved or sinuose, unbranched or irregularly branched; labia convergent or partly divergent, not or slightly whitish pruinose along the slit, entire (hossei-morph); disk usually not or rarely visible from above. Exciple laterally to almost completely carbonized; hymenium clear. Asci (2-)4-8-spored; ascospores hyaline, with 11–17-septate, 50–110 × 8–14 μm.
Chemistry. No substances detected by TLC.
Substrate and Habitat. Corticolous on hardwood trees.
Distribution. Southeastern Asia - 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.