Passion Flowers are perennial vine plants and know several species in the world. They are tropical plant and prefer to grow full sun area and reach to 10m (33 feet) length climbing hence or other plants. In USA Passion Flower blooms fragrant flowers in summer season and produces egg shape fruits (some of them are edible). They are easy to grow plants and often used as garden flower plant for adding exotic flavor. Passion Flowers are also used as herbal plants for anxiety and insomnia by drying the stems, leaves and flowers etc.
Second photo is for Fruit of Passion Flower.