*[http://www.biodiversitylibrary.org/search.aspx?SearchTerm=Syringa%20vulgaris&SearchCat= BHL]
*[http://www.efloras.org/florataxon.aspx?flora_id=5&taxon_id=220013210 Flora of Pakistan]
*[http://mansfeldbotanical.ipk-gatersleben.decom/apexbotanical/f?p=185:46:12626896830707::NO::module,mf_use,source,akzanz,rehm,akzname,taxid:mf,,botnam,0,,Syringa%20vulgaris,11623 mgmh/l/lilacs20.html Grieve's herbal]
*[http://www.ars-grin.gov/cgi-bin/npgs/html/tax_search.pl?Syringa%20vulgaris GRIN]
*[http://www.ipni.org/ipni/simplePlantNameSearch.do?find_wholeName=Syringa%20vulgaris&output_format=normal&query_type=by_query&back_page=query_ipni.html IPNI]