A foliose lichen species, Lobaria retigera mediated environmentally sustainable, economically viable green synthesis procedure to access Ag doped SnO2 (Ag@SnO2) and hierarchical Ag doped SnO2 decorated reduced graphene oxide (rGO-Ag@SnO2) nanohybrid material is reported. Carbohydrate, a primary metabolite present in the aqueous lichen extract is presumed to be responsible for the reduction and stabilization of the nanoparticles. The nanoparticles were mostly spherical with brid material. The reduction of nitroaromatics to amino-compounds were confirmed by UV–visible spectroscopy and LC-MS study. The recyclability of the catalysts were confirmed by performing repeated reduction reactions with virtually no loss of its catalytic features. BET study of the hybrid materials revealed a type IV with H3 hysteresis loop indicating a high mesoporous nature with significant extended surface area. The dispersed Ag doped rutile-SnO2 over rGO sheet could be clearly discerned from TEM and SEM micrographs. Elemental mapping distinctly revealed the homogeneous distribution of the constituent elements in the hybrid materials. Keywords: Green synthesis; RGO; Lobaria retigera; Nitroaromatics; Catalysis.