We usually call it butterfly bush because the flowers on the ends of long stems just dance in the breeze. But the nursery knows it as Guara, a native of Texas.
@ludwigsdiana It appears to have both spellings. The tag from the plant says guara, but when I looked it up on line it had both spellings. It is also called wand flower or bee blossom. My neighbors call it butterfly bush, but the nursery took me to a different plant with that name. Thanks for pointing this out.