This flower was found in Antrim Park.
It is on page 166 in Newcomb’s Wildflowers.
Common name Flowering Dogwood. Scientific name: Cornus florida L.
Corolla: 4 separate petals.
Calyx: 4 fused sepals.
Adroecium: 4 separate stamen.
Gynoecium type: syncarpous (and # of carpels = 2)
Ovules are two per carpel.
Flower type/ovary position: epigynous
Flower symmetry: actinomorphic (regular).