Looks like Syringa reticulata...maybe Syringa reticulata Ivory Silk which is found in Canada. ....a lilac tree. Quote....."The creamy white fragrant blooms arranged in clusters up to 12 inches long arise above dark green foliage. After blooming, the tree is covered with emerald-green leaves." Syringa reticulata "Ivory Silk" canada - Google Search Syringa reticulata Ivory Silk leaves - Google Search:
