black corolla flower nature orange petal petals plant white yellow androecium anther buds calyx carpel carpels filament flowers gynoecium lilac plants pollen pollination saavem sepals abundance abundant Bignoniaceae bipinnate leaves blossoms colorful colourful cultural culture five-lobed flower flora flowering flowering tree jacaranda jacaranda mimosifolia ornamental purple purple flowers purple-blue corolla spring tree vigorous foliage green leaves anthers colors colours common cultivar dark display dusk filaments floral flowering-plant garden-flower garden-plant hibiscus leaf light Malvaceae papery pink shrub stamens staminal-column stigmas trumpet-shaped variety veins bright popular prolific brilliant flowering plant garden flower garden plant staminal column