This is Oenothera filiformis, also known as Large flowering Gaura, Gaura longiflora, and Long Flower Beeblossom. Growing up to 6 feet tall this plant likes to live in full sun to partial shade. Blooming in the Summertime this plant has white blossoms. Oenothera filiformis is a larval host for the White-lined Sphinx, Proud sphinx, and Juanita sphinx moth. This plant is grown as an annual everywhere and it is a short lived perennial in USDA Hardiness Zones 4 to 8