Butterfly bush: It is a lively shrub and it sprouts purple florets that form a cone-shaped ball flower. When the flowers are in full bloom, many butterflies will be seen flying around the shrubs like they are dancing with joy. As their nectar is butterfly's favorite food, it is called butterfly bush.
Summer lilac: Lilac can be traced back to the word, "leylak" in Turkish language which is probably originated the name of the plant in the Balkans. Now, lilac is referred to as an aroma or a pale violet tone. Furthermore, Buddleja davidii's flowers are purple and fragrant, and it blooms in the summer. Hence, it is known as summer lilac.