What is the name of this bush with pink flowers?
This is Bougainvillea! It is a genus of thorny ornamental vines, bushes, and trees with flower-like spring leaves near its flowers. Bougainvilleas are popular ornamental plants in most areas with warm climates. Locarno in Switzerland, with its mild Mediterranean climate, is famous for its bougainvilleas.
Bougainvillea are also known as:
bugambilia (Mexico andPhilippines),
Veranera (Colombia, Nicaragua, El Salvador, Costa Rica and Panama),
Trinitaria (Colombia, Cuba, Panama, Puerto Rico, Dominican Republic & Venezuela),
Santa Rita (Argentina, Bolivia, Brazil, Paraguay and Uruguay),
Orpapelillo (northern Peru).
But please note that the sap of the Bougainvillea can cause serious skin rashes, similar to toxicodendron species.