 In the first phase, the individual small flowers, known as florets, remain unopened—and the flowerhead retains a compact shape—before they mature and split open, revealing the stigma, style, and anther.The anther is sessile, lacking a filament, and lies next to the stigma at the end of the style.The outermost florets open first, with anthesis progressing towards the centre of the flowerhead, which becomes darker and more open in appearance, and begins attracting birds and insects.