Wi' purple blossoms to the spring.
And I a bird to shelter there,
When wearied on my little wing;
How I wad mourn when it was torn
By autumn wild and winter rude!
But I wad sing on wanton wing
When youthfu' May its bloom renew'ed.
Robert Burns 1759-1796
The lilac is a member of the olive family but known as Blue-pipe in allusion to its hollow stems being used for pipes.
Called May Flower and Lily-oak by country people and many of them were superstitious about bringing the lilac indoors. Particularly the white variety whose meaning was Youthful Innocence.
In some villages a lilac branch is said to signify a broken engagemanet.