Syringa × persica
Syringa × persica, the Persian lilac, is a hybrid, thought to originate from a cross of Syringa × laciniata and S. afghanica. Its height grows up to 4–8 ft and spreads about 5–10 ft, and prefers warmer winter climates than many species of lilac.
This is a different plant than Melia azedarach, also sometimes called Persian lilac.