A lilac is a small Eurasian tree or shrub that is known for its vibrant, fragrant purple and white flowers. Because of its small size, the lilac tree is used mostly as an ornamental tree. The lilac is part of the olive family in the genus Syringa.
The blooms on a lilac tree form in clusters and include pink shades along with prominent purples and whites. Because of the lilac blooms' dominant purple coloring, the word "lilac" is also used to describe an object that is a light shade of purple. The lilac is the official state flower of New Hampshire.