syringa
noun
sy·rin·ga sə-ˈriŋ-gə 
: mock orange sense 1
Example Sentences
Recent Examples on the Web In every yard a dozen landmarks (here a lilac bush, there a sweet syringa) are missing. 
New York Times, 30 Aug. 2021
New York Times, 30 Aug. 2021 Word History
Etymology
New Latin, genus name, from Greek syring-, syrinx panpipe
First Known Use
1664, in the meaning defined above