TYPE. “Habitat in America ad corticem Cinchonarum.” (Acharius 1814); AMERICA MERIDIONALIS [South America]. H-ACH 586, lectotype designated by Staiger (2002).
Description.Life form: lichenized fungus.
Thallus crustose, off-white to whitish gray, continuous, smooth, dull or rarely slightly glossy; vegetative diapsores absent. Photobiont trenteophlioid alga. Ascomata lirellae, erumpent to prominent lacking a thalline margin or with basal thalline margin, elongate, straight or curved, unbranched, rarely trifurcate; labia convergent, striate, black, not pruinose; disk concealed (striatula-morph). Exciple laterally carbonized; hymenium clear, 70-100 μm high; paraphyses ~1.5 µm thick, tips browned and somewhat thickened. Asci 8-spored; ascospores hyaline, transversely 7–15-septate, 25–45 × 6–8 μm.
Chemistry. No lichen substances detected by TLC; spores I+ blue-violet.
Substrate and Habitat. Corticolous on hardwood trees.
Distribution. Pantropical, north into eastern North America; in North Carolina found in Coastal Plain ecoregion.
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.
Staiger B. (2002) Die Flechtenfamilie Graphidaceae. Studien in Richtung einer natürlicheren Gliederung. Bibliotheca Lichenologica85: 1–526.