Abstract
Geranium lucarinii, a new species from central Italy (Umbria), is described. This species is morphologically closely related to G. macrorrhizum, from which it differs in some features regarding indumentum, leaves and calyx. The morphology, ecology, and conservation status of the new species are examined, as well as G. kikianum is re-evaluated, and an analytical key for the species belonging to Geranium sect. Unguiculata is provided.