Why do some flowers start blooming at certain time in the morning?

Question

I live in the East Coast of Malaysia Peninsula. There’s this one type of flower I always pluck in the morning to use it in food colouring. I only choose blooming flower.

The sun rises around 7AM here. I usually pluck that flowers on that time. One day, when I came out again, I noticed the flowers on the same plant that didn’t bloom before were now fully blooming at 8AM. But one or two hour later, the same flowers that didn’t bloom at 8AM still didn’t bloom.

In: Biology

Answer 1

I forgot to put the name of the flower. Bunga telang =Asian pigeonwings