The stewartia (Stewartia pseudocamellia) flowers are similar to the Franklin tree blooms or, as the species name indicates, camellias: white petals with orange anthers.
The growing flower buds look like pin cushions.
This native of Japan is a three-season tree: beautiful summer blossoms, excellent fall color, and exfoliating bark (for winter interest).
These trees do not establish easily. Green-Wood has several young stewartias that I hope will survive the drought.