Hibiscus finale

Think most of the Hibiscus flower's growth phases have been covered here, with the exception of the grand finale - the crucial and unfailingly  
spectacular bud-opening-to-full-bloom phase.
By now, all of those enormous reserves of energy that had been flowing up the plant and into the closed bud, powering the rapid growth of those tightly furled leaves and extravagant central stamen, have been completely exhausted. 
The ever-growing leaves have completely untwisted themselves, each extricating itself from the intertwined knot within the bud, and opened out to form the main spokes of the flower in full pink bloom.
The dark pink stamen has fully straightened itself out, while each of the small spikes at its outer end has been tipped with a strategically positioned knob of pollen, ready to rub off on to any visiting bees.
In the meantime, the body of the green outer casing of the bud remains in place, largely unchanged except for the section on top, which has transformed itself from a tight, pointy tip to fully splayed flower base.
The flower tends to stay in this full-on display phase for about a week, give or take - amateur's guesstimate - which in theatrical terms makes it something of an extended grand finale.
Which is a very Dame Nellie Melba way of making a final farewell.