This term and its sub-classes apply to an individual flower (PO:000904). During this stage, a flower undergoes the process of flower development (GO:0009908), defined as the process whose specific outcome is the progression of the flower over time, from its formation to the mature structure. For the development stage of a whole plant (PO:0000003), use whole plant flowering stage (PO:0007016).

A reproductive shoot system development stage (PO:0025530) that occurs in an individual flower (PO:000904) during the interval between the onset of a flower meristem transition stage (PO:0025588) and the end of a flowering stage (PO:0007616).