Passion flower

Passion flower, (genus Passiflora), also spelled passionflower, genus of more than 500 species of mostly tendril-bearing vines in the family Passifloraceae, and their characteristic flowers. Most species are found throughout neotropical regions of the Americas. Some are cultivated as ornamentals; others are grown for their edible fruits. Many are important host plants to butterflies.

Most passion flowers are climbing or prostrate vines with grasping tendrils; some are trees or shrubs. The plants can be herbaceous or woody. The simple leaves are entire or lobed, and a single plant may produce a diversity of leaf shapes. The passion flower blossom varies in form from a shallow saucer shape to a long cylindrical or trumpet-shaped tube, producing at its upper border five sepals, five petals, and many threadlike or membranous outgrowths from the tube, which constitute the most conspicuous and beautiful part of the flower, called the corona. From the base of the inner part of the tube rises a stalk bearing above the middle a ring of five stamens (the male pollen-producing structures). Above the stamens is the female structure, or ovary, at the top of which arise three widely spreading styles. Each style ends in a button-like stigma, giving an appearance rather like a large-headed nail. The flowers can be minute or large and showy. The ovary, with a single compartment, contains numerous seeds arranged in three groups and ripens into a berrylike or capsular fruit. [Source]

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