The sunflower opens.

 Late July. It's centre just visible in a sea of green.

 Here we are in August with it unfolding it's petals.

 Three days later and it is fully opened.

 All of these will soon make up one large seedhead.

 Only four days later and the centre is filling out and has convexed like a toddler's tummy. Very rotund.

Not long till the birds will be landing on it to pull at the seeds.