I believe angelonia is the botanical name. It is also called summer snapdragon. It is classified as an annual.

Betty

The garden angelonia is Angelonia angustifolia.

but in my zone, it has behaved like a perennial. I love these!

Angeloni9a is a tender perennial. When the winter was mild it came back for me but it did not after the last two winters. It is said to be hardy in zone 9.