Young Blonde Girl With Red Petals Leaves Strips From The Wedding Dress

In many plants of the aster family such as the sunflower, Helianthus annuus, the circumference of the flower head is composed of ray florets. Each ray floret is anatomically an individual flower with a single large petal.
Although petals are usually the most conspicuous parts of a flower, some species, such as grasses, have either very small petals or lack them entirely.