After comparison between Corsican and Sardinian Centranthus sect. Nervosae, two species are distinguished. One is endemic to Corsica (C. trinervis), the other one is a new endemic species from Sardinia : C. amazonum. The two species have narrowly restricted ranges : one population in Corsica with about 100 plants and one (maybe 2) in Sardinia (about 30 plants). Comparison of cultivated plants from seeds collected in the field confirms the distinction between the species.