Posted: 14/05/2013 at 19:19
I actually suggested this earlier but didn't think you had seen my post.
You can rule our Syringa persica laciniata completely....
correctly called Syringa x laciniata
The leaf is very very different.
Laciniata means cut leaf.
Your lilac definitely does not have a cut leaf!
The internet is wonderful but not every picture on it is correctly labelled.
See this accurate pic of the leaves!....