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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 buttonlike stigma, giving an appearance rather like a large-headed nail. The flowers can be minute, such as those of the corkystem passion flower (Passiflora suberosa), 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.