 Disc floret

A disc floret is a small tubular flower within a flower head of Asteraceae. Its corolla usually ends in approximately equal lobes. In a radiating daisy-like head, disc florets occupy the central region, surrounded by ray florets; other heads can contain only tubular flowers. The word disc describes the collective arrangement, not a flat disc-shaped individual flower.^[ref]

A hand-lens comparison makes the unit clear. Lift one central disc floret from a common daisy head and follow its narrow corolla down toward the ovary. Then compare an outer ray floret with its extended strap-like corolla. Both are whole flowers, even though the outer one resembles a single petal of a larger blossom.

An illustrative count of twenty central disc florets and ten peripheral ray florets describes thirty constituent flowers, not thirty petals of one flower. Whether each unit is fertile must be checked from its reproductive structures and the species, rather than inferred just from its position.