FOR Majorca's magnificent display of oleanders in public places, private gardens and, also and especially, its motorways. At some points the variety of colours and the abundance of blossoms are almost such as to be a traffic hazard, so appealing do they solicit even passing attention. The dictionary tells us that these oleanders are “poisonous” but that can refer only to the sap they release if cut. Otherwise they fulfil perfectly in a southern climate the role that the rhododendrom plays in British landscapes.