Hi
taken this snap of Sunflowers in an agricultural field at Shyamkhola near Kolkata.
An interesting fact about this flower is that although we call it sun-flower but actually its an inflorescence made up of several florets....the larger Ray florets of the margin, and the tiny Disc florets of the central disc.
Just recollected this fact from my botany syllabus.... : )
Botanists can throw more light on this aspect.
regards
Shantanu : )