TYPE. UNITED STATES. North Carolina, Guilford Co., 8 mi. SW of Greensboro, on trunk of Quercus falcata, 10.VI.1969, M.J. Dibben 20653 (DUKE, holotype).
Description.Life form: lichenized fungus.
[modified from Dibben 1980] Thallus gray or yellowish-gray, episubstratal, thin to moderately thick or thicker, the margin +/- entire and at times zoned, generally more yellow-white than the thallus). Surface initially smooth to soon heavily verrucose, shiny or matt, predominantly continuous to locally lightly fissured (substrate, never areolate. Vegetative diaspores absent. Fertile warts high-arched and hemispherical or flat-topped, generally smooth-surfaced (rarely radiately-fissured), numerous and crowded, often fused 2-5(-8) or as multiperforate sheets, (0.4-)0.8(-2.2) mm diam. Ostioles 1 or 2-4-(5) or more per wart, always dark beneath, level or minutely papillate, infrequently surrounded by a yellow-pink border, but predominantly sunken, (0.05-)0.1(-0.2) mm wide, at times grouped in a central depression, (0.1-0-.4-(0.8) mm in diam. Ascomata pertusaroid apothecia (1-)2-3(-5) per wart, (0.24-)0.55(-0.96) mm in diameter; hymenium hyaline to yellow-brown; hypothecium pallid (rarely hyaline); epithecium hyaline to dark-brown or black, K- or K+ weakly wine-red. Asci clavate or cylindrical, (35-)58(-85) x (235-)335(-445) μm. Ascospores 8 per ascus, predominantly biseriate and irregular (occasionally lateral) to less often (apically) uniseriate in ascus, simple, ellipsoid or fusiform, (20-)35(-50) x (50-)85(-135) μm, the wall and lumen K-. Outer spore wall (1)-3-(7) μm thick, at times thickest in the midplane; inner spore wall (2)-4-(9) μm thick, smooth, unzoned, but always trimmed; end wall (6)-13-(28) μm thick. Conidiomata not seen.