Gyrographa fecunda sp. nov. (Roccellaceae) is described from rhyolite in eastern New South Wales. It has a pale to medium greyish brown, minutely areolate thallus containing gyrophoric acid, very small adnate to subsessile ascomata with a lirelliform to contorted-gyrose disc, a blackish lateral excipulum, a dark hypothecium and 3-septate ascospores.