It looks like a single flower but it is in fact an inflorescence called:

Explanation

A capitulum, also known as a head or composite flower, is a unique type of inflorescence found in plants such as sunflowers and daisies. It consists of a dense cluster of small, individual flowers called florets, which are tightly packed together on a flattened receptacle. The outermost ring of florets is often larger and showier, resembling petals, while the inner florets are usually tubular in shape. The capitulum gives the appearance of a single flower, but it is actually made up of many individual flowers.