A new endemic species of the pantropical genus Scaevola L., S. barrierei A.S.Wulff & Munzinger, sp. nov. is described from New Caledonia. It grows in open shrub land on ultramafic substrate. It is characterized by its coriaceous and pubescent leafs on the abaxial side and its raised yellow flowers, pubescent on the exterior. This species is preliminarily assigned as “critically endangered” (CR) following IUCN Red List Categories and Criteria.