This flower called Pink Passion Vine from Switzerland on sale in a Sunday Market in the Philippines. Here is an interesting comment from peter (PJR61), our flickr friend -
Passionflower (Passiflora incarnata) is a vine whose leaves and flowers are widely used in Europe to make a herbal remedy for anxiety and insomnia. The plant, which is native to the tropical regions of North America, was first used by the Aztecs of Mexico as a folk remedy for these conditions. Passionflower is also known as maypop, apricot vine, passion vine, and granadilla. It grows as much as 30 ft (10 m) tall, with a thick, woody stem.
Passionflower received its name from the sixteenth-century conquistadors who claimed Mexico for the Spanish Empire. The priests and soldiers who accompanied Hernando Cortez thought that the whitish-purple flowers of the vine symbolized certain features of the passion of Christ. The corona in the center of the flower reminded them of Christ's crown of thorns, the five stamens of the number of Christ's wounds, and the tendrils of the whips that were used to scourge Christ.