I find this a most intriguing and fascinating flower.
Clematis Duchess of Edinburgh. A deciduous plant so not a pretty sight in winter (a tangle of brown sticks!) But by March the leaves are beginning to unfurl. Then flower buds appear and are amazing.
The bud itself is tightly packed curled up inside itself surrounded by 6 bracts on long stems, which gradually open out to give a sputnik type appearance.
The flower opens in May and although not bright and colourful, I think it is very beautiful.