Acanthocereus

Plants shrub like, branched and stout. The stems are three-angled from light to dark green depending on age. The flowers are huge, 6 to...Read More 10 inches long and 4 to 5 inches in diameter. They open at night and last the day.
Honey bees go crazy. I've counted between 15 to 20 bees in each flower collecting nectar and pollen.
Propagation is simple: cut a stem, stick it in potting soil and water well. Keep moist until new stems start. Flower production starts after 4 or 5 years and occurs several times during the spring-summer season.
My plant is growing next to a stone wall and the stems have attached themselves to the wall.