Syringa vulgaris
Syringa vulgaris L.
Engl.: common lilac, lilac.
Deu.: Gemeiner Flieder.
Suom.: pihasyreeni.
Sven.: syren, bondsyren, vanlig syren.
Lilac flowers.
Henriette's herbal blog: I've always thought that lilacs are more or less toxic.