Question

which plant us often known as butterfly bush​

Answer 1

Buddleja davidii (spelling variant Buddleia davidii), also called summer lilac, butterfly-bush, or orange eye, is a species of flowering plant in the family Scrophulariaceae, native to Sichuan and Hubei provinces in central China, and also Japan.

Answer 2

Buddleia plant us often known as butterfly bush​.